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Central Bank of Oman
Central Bank of Oman Alternative Site at KOM, Muscat Volume IV Architectural Specification
May 2011
Central Bank of Oman
Central Bank of Oman Alternative Site at KOM, Muscat Volume IV Architectural Specification May 2011
Report no.
210206
Issue no.
0
Date of issue
May 2011
Prepared
HMB
Checked
SVHK
Approved
NIBU
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Table of Contents 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10
General Information Project Details Associated Contracts General Requirements ‘As-Built’ Drawings and Information to be provided Manufacturers’ Data Site Meetings Warranties & Guarantees Manufacturer’s Recommended Spares Substantial Completion and Handover Period of Maintenance
6 6 7 7 11 12 13 14 15 15 19
2 2.1 2.2 2.3
Plasterwork and Floor Screeds General Materials Execution
21 21 22 23
3 3.1 3.2 3.3 3.4
Membrane Roofing General Materials Execution Protection
29 29 30 32 34
4 4.1 4.2 4.3
Carpentry and Joinery General Materials Execution
35 35 36 39
5 5.1
Metal Doors General
46 46
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5.2 5.3
Materials Execution
47 47
6 6.1 6.2 6.3
Wooden Doors General Materials - Doors Execution - Doors
49 49 50 52
7 7.1 7.2 7.3 7.4 7.5
Aluminium Doors & Windows General Relevant standards Materials and Performance Execution Automatic doors
54 54 54 55 57 58
8 8.1 8.2 8.3
Ironmongery General Materials Execution
59 59 60 60
9 9.1 9.2 9.3 9.4
Glazing General Materials Execution Structural Glazing
62 62 62 64 68
10 10.1 10.2 10.3 10.4
Ceramic Tiling General Materials Execution Special Requirements
69 69 70 72 76
11 11.1 11.2 11.3
Hard Floor Tiling General Materials Execution
77 77 77 79
12 12.1 12.2 12.3
Concrete/Screed Hardener General Materials Execution
81 81 81 82
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13 13.1 13.2 13.3
Suspended Ceilings General Materials Execution
83 83 84 86
14 14.1 14.2 14.3 14.4
Raised Access Flooring General Materials Installation Inspection and Testing
89 89 89 90 91
15 15.1 15.2 15.3 15.4 15.5
Demountable Partitions Scope of Work Standards Submittals Materials Installation
92 92 92 92 92 93
16 16.1 16.2 16.3
Painting General Materials Execution
94 94 96 98
17 17.1 17.2 17.3
Carpeting General Materials Execution
104 104 105 106
18 18.1 18.2 18.3
Stone Cladding General Materials Execution
108 108 108 109
19 19.1 19.2 19.3
Metal Cladding General Material Execution
111 111 111 112
20 20.1 20.2 20.3
Joints, Sealants and Joint Covers General Materials Execution
113 113 113 114
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21 21.1 21.2 21.3 21.4 21.5 21.6
Sanitary Ware General Materials Fixing Sealant Protection Inspection and Testing
116 116 116 116 117 117 117
22 22.1 22.2 22.3 22.4 22.5
Wall Guard Systems General System Description Submittals Manufacturer Execution
118 118 118 119 119 120
23 23.1 23.2 23.3 23.4 23.5
External Work – Ground Finishes Scope General Materials Pre-cast Concrete Paving Blocks Workmanship
122 122 122 124 127 131
24 24.1 24.2 24.3 24.4
Flood Gates Scope General Products Execution
136 136 136 139 141
25 25.1 25.2
Vertical Transportation Systems Passenger Lifts and Goods Lift Execution
144 144 175
26 26.1 26.2 26.3
Asphalt Paving General Asphalt Paving Concrete Kerbs
178 178 178 178
27
Through Coloured Render
181
28 28.1 28.2
Carpets General Materials
183 183 184
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28.3
Execution
184
29 29.1 29.2 29.3
Flagpoles and Flags General Materials Execution
186 186 186 186
30 30.1 30.2 30.3
Carpark shades General Materials Execution
187 187 187 187
31 31.1 31.2 31.3 31.4
Epoxy Resin Flooring General Material Preparation Of Substrates Laying Flooring
188 188 188 189 190
32 32.1 32.2 32.3
Anti- Static Vinyl Tiles General Material Laying Flooring
192 192 192 193
33 33.1 33.2 33.3
Porcelain Tiles General Material Execution
194 194 194 196
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General Information
1.1 Project Details 1.1.1 General The project comprises of the following works: •
Construction of new Office Building comprising of 6 floors (Basement, Ground floor, 4 typical floors) in accordance with the drawings and specifications.
•
The construction of the basement raft and the retaining walls all around along with the access ramp and the water tank structure have been constructed in package .
•
Construction of Security Buildings, ETS building and fenced compound with services buildings.
•
Construction of external works including boundary wall – partly K4 rated, parking and access roads, etc.
•
Modification to existing road around the plot for entry and exits.
1.1.2 Location The project site is located within the premises of Knowledge Oasis Muscat at Al Khod Seeb. 1.1.3 Site Conditions A copy of the Site Investigation Report is available for review at the Engineer’s office. It is a requirement that all Tenderers shall read the report and acquaint themselves fully with its contents. No consideration shall be given to any claims arising from non-acquaintance of the site conditions. The Main Contractor will be responsible for all making-up of ground to finished levels where required including compaction and testing of the made up ground. The principal foundation system for the building will be concrete, bored castin-situ pile foundations under the columns in accordance with the recommendations of the Site Investigation Report and strip foundations or ground slab thickening under the walls.
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All foundations and basements are to be protected as shown on the drawings. All basement areas are to be fully tanked as detailed on the drawings.
1.2 Associated Contracts The present tender includes the general construction work, complete with most finishes, fittings and electro-mechanical engineering installations, specialist security and Data Centre requirements and associated external work.
1.3 General Requirements The following contains a description of general requirements to be part of the scope of work. These works shall be deemed to be included in the Contractor’s Preliminaries. 1.3.1 Signboards Supply and fix project sign board(s) in compliance with the requirements of KoM at the entrance to the site. Prepare layout sketch for the Engineer’s approval prior to fabrication and erection. 1.3.2 Notices and Permits It is the Contractor’s responsibility to obtain all Authority approval/permits required for the execution of the entire project work. 1.3.3 Use of the Site The work shall be carried out to cause minimum disturbance to the operation of the adjacent roads and adjoining buildings. The Contractor shall within one week from the Instructions to Commence submit a site plan including all site facilities, stores, cranes and stationary equipment for the Engineer’s approval. 1.3.4 Consultant’s Site Facilities Provide site facilities for the Consultant in accordance with the schedule in the preliminaries section and Appendix A hereto. The site facilities shall be maintained and serviced for the duration of the project. 1.3.5 Record Photographs The Contractor shall provide progress photos, on a monthly basis. Three sets of photos shall be submitted monthly and shall remain the sole property of the Client. The Contractor shall not use any photos for other purposes without the Client’s written consent. The Contractor should note that photography in the area is strictly controlled and that improper use of cameras could lead to difficulties with the Security Forces.
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1.3.6 Contractor’s Supervision The Contractor shall provide a suitable supervision team full time on site. The Contractor’s Engineers shall have relevant successful experience from similar projects. Qualifications and experience details of the main members of the team are to be submitted with the tender for the Engineer’s approval, and interviews with the Engineer are to be conducted prior to approval of any staff. 1.3.7 Standard of Workmanship & Materials All work shall be executed with the best workmanship and to accepted standard practices. Relevant British Standards and other Codes of Practice shall be followed unless otherwise indicated in accompanying drawings/specifications or where otherwise directed by the Engineer. Reference to British Standards which shall refer to the edition current at the time, shall not preclude the use of materials from sources where other standards apply, but no materials to be incorporated in the works shall be in any respect inferior to those which specifically comply with the British Standard. Should the Engineer discover on the works any material other than those approved, he may order their removal from the site, including the demolition of any works already built with these materials. All proprietary materials incorporated in the works shall be fixed or applied strictly in accordance with the Manufacturer’s instructions. Where proprietary materials are referred to in this specification the intention is to establish the type and quality of materials required. Similar materials of equal and alternative manufacture may be offered in substitution, for approval by the Engineer. The Engineer has no obligation to approve the alternatives offered by the Contractor. All materials to be used in the permanent works shall be stored on racks or supports, in bins, under cover etc. as appropriate to prevent deterioration or damage from any cause whatsoever. Storage arrangements for specific materials shall be as approved by the Engineer. Where materials, products and workmanship are not fully specified, they shall be suitable for the purpose of the works stated in or reasonably to be inferred from the Contract Documents, and in accordance with good building practice, to the satisfaction of the Engineer. Approval of all products or materials specified is required. The Contractor shall submit samples or other evidence of suitability to the Engineer at least 21 days before the approval is required. The Contractor shall not confirm orders or use materials until approval has been obtained. Delays due to non-submission of samples or inadequate support literature shall be the sole responsibility of the Contractor. Approved samples shall be retained on site for comparison with products and materials used in the works and shall only be removed when no longer required by the Engineer.
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Where samples of finished work are specified, the Contractor shall obtain approval of stated characteristics before proceeding with the works and shall retain approved samples on site for comparison with the works. Samples which are not part of the finished works shall be removed when no longer required by the Engineer. 1.3.8 Inspection and Testing Whenever considered desirable the Engineer or his representative may visit the source of supply or Manufacturer’s work areas to test the materials or supervise their production. Materials shall be tested before leaving the supplier’s premises or Manufacturer’s works as well as after delivery to the works. The Contractor shall allow reasonable time for the Engineer to make arrangements for inspection and give permission for dispatch to the site. Delay to the works arising from late notification of such details will not be accepted as reason for delay in completion of the works. All Manufacturer’s certificates of tests, proof sheets, mill sheets etc. (in English language) showing that the materials have been tested in accordance with the requirements of the appropriate British Standards, other relevant standard or this specification, shall be supplied free of charge, if required by the Engineer. 1.3.9 Working Drawings (Shop Drawings) 1.3.9.1General Requirements Prepare working drawings for all services, assemblies and pre-cast/fabricated components in accordance with this section and relevant sections of the Services Specification. Submit to the Engineer for approval four copies of all working details and drawings and also supply two copies for the use of the Employer and other interested parties. These drawings must be submitted as soon as possible after the contract is awarded to give ample time for all concerned to study and comment thereon prior to the programmed commencement date for the related works. Latest submission shall be 3 weeks before commencement date for the work. Carefully check the work described on working drawings for all clearances, field conditions, maintenance of architectural conditions and proper coordination with all trades on the job. To this end, during production drawing stage, co-ordinate drawings of all other trades that might interfere with the proper installation of the work. Any unresolved conflict between trades shall be referred to the Engineer. 1.3.9.2 Details to be shown Services and equipment layouts shall be detailed on the drawings, showing the exact method of installation and clearly illustrating components to be used in making of all connections. Site layout drawings shall be drawn to a scale of 1:200.
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General layout drawings shall be drawn to 1:50 scale, unless agreed otherwise with the Engineer. Toilet piping layout, details and hangers, cleanouts, distribution boards, power and control panels, methods of fixing of all equipment, including pipes and conduits, detailed cross sections of service ducts, etc. are to be drawn to 1:10 scale. Prepare schedules and drawings showing precise details of holes in concrete, block work, etc. bases, frames or support required and the like. The schedules shall show in-detail the builder’s work required to be performed by all other trades for the services installations. These drawings and schedules, in an approved form, must be submitted to and properly approved by the Engineer before any structural work requiring holes or other modifications is constructed. 1.3.9.3 Approval Procedures Submit all drawings as prescribed hereunder. All drawings submitted for approval shall be supplied in the form of prints and signed by a principal of the Contract. After approval, the negatives will be signed by the Engineer and returned to the Contractor who shall then provide four sets of prints to the Engineer. Signed and approved drawings will not be departed from unless a signed variation or omission certificate is issued in writing by the Engineer. Drawings returned to the Contractor for alteration or amendment shall be re-submitted to the Engineer for approval. Amended or altered drawings shall show the nature of the amendment or alteration in a revision block on the drawing, together with the revision number or letter and the date of the revision. The Engineer’s approval of working details and drawings will not relieve the Contractor of his responsibility for errors and incorrect setting out. The Engineer’s approval is only general and not intended to serve as a check and does not relieve the Contractor from furnishing the materials and performing the works as required by the Drawings and Specifications. Should the Contractor prove to be unable to produce satisfactory “Working Drawings” or be unable to produce drawings to conform to the progress of the work, the Engineer reserves the right to take whatever steps are necessary to have drawings undertaken by others and debit the cost of the same to the Contractor’s account. Any decision taken by the Engineer to have working drawings produced elsewhere will not relieve the Contractor of his contractual obligations and the Contractor must provide to the Engineer all necessary details, physical dimensions, descriptive literature, etc. of all equipment to be incorporated on drawings within 10 days of a request from the Engineer.
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1.4 ‘As-Built’ Drawings and Information to be provided 1.4.1 General Requirements Arrange to keep on site a full set of drawings showing the progress of the Works, which must be kept up-to-date. Keep a record as the work proceeds of any work installed not in accordance with the drawings. Upon completion of the Works, prepare a completely new set of drawings for the work as executed and submit same in duplicate to the Engineer. Submit two sets of diskettes (AutoCAD), and two copies of all drawings duly marked ‘AsBuilt’ clearly defining all locations, depths, shapes and dimensions of all permanent works executed. These shall include, but not necessarily be limited to Architectural, Structural, all Services and purpose-made components and assemblies. The words “AS BUILT” shall be clearly indicated on all drawings adjacent to the title block. Each set of prints shall be bound into the Operation and Maintenance (O & M) manuals, with each drawing separately folded and contained in plastic sleeves. There will be no entitlement for any extra payment or extension of time for the correction, preparation and supplying of the above mentioned drawings and information. The completion certificate for the work will not be issued until the Service Manuals and ‘As-Built’ Drawings are approved. 1.4.2 Service Requirements For Mechanical and Electrical plant and equipment, provide the following information to be incorporated in the O & M manuals:1. Detailed Design Conditions & Criteria and schedules of the Plant as actually installed. 2. Instructions for the Maintenance and Overhaul of the Plant installed. 3. Recommendations for consumable supplies, e.g. packings, lubricants, etc. for the Plant installed. 4. Drawings showing the internal construction of the major items, with parts listed and reference numbers for ordering spares. 5. Complete assembly drawings of machinery and ancillary plant showing all pipe connections and fittings. 6. General arrangement drawings showing all equipment, cabling, tray-work, etc. 7. Detailed arrangement of any conduit work buried in floors, walls or ceilings, in any buildings or concrete works. 8. Detailed wiring diagrams of the main circuits. 9. Diagrams of connections between all items of equipment (e.g. main and auxiliary switchboards, motors, starters, batteries, meters, instruments,
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relays, electronic and allied equipment, etc., with component values and types suitably marked thereon). There will be no entitlement for any extra payment or extension of time for the correction, preparation and supplying of the above mentioned drawings and information. The completion certificate shall not be issued until all service manuals and ‘As-Built’ Drawings are approved.
1.5 Manufacturers’ Data Manufacturers’ performance data and certified factory drawings of apparatus, giving full information as to capacity, dimensions, materials and all information pertinent to the adequacy of materials and equipment shall be submitted for approval. Manufacturer names, sizes, catalogue numbers and/or samples of all materials shall be submitted for approval. Submittals and working drawings should, as far as possible be complementary so that drawings and submittals can be cross-checked. Ordering details of material submitted for approval must be accompanied by relevant drawings, technical data, catalogues and samples. Where data certified drawings or other required information is not available until after orders have been placed, the Engineer will give provisional approval conditional on all requested drawings and information being supplied to the Engineer found to be acceptable by him. Ensure that all necessary information is supplied to the Engineer in accordance with the progress of the work. 1.5.1 Preliminary Programme (Clause 14) A preliminary outline programme for carrying out the works shall be prepared by the Contractor and submitted with the Tender. Within 14 days after the acceptance of the Tender, prepare a final programme for carrying out the works and submit copies of the programme to the Engineer for approval. The programme shall be sufficiently detailed to show in itemised graphic bar chart form all trades and activities necessary for the completion of the structural works. The programme shall identify a “critical path” of activities essential for timely completion of the works which shall define the earliest and latest possible dates for commencement and completion of each activity. 1.5.2 Detail Programme (Clause 14) The final programme shall be prepared by the Contractor and submitted within six weeks after acceptance of the Tender. It shall be accompanied by a comprehensive materials ordering schedule showing latest dates for approval of proposed materials in order to meet the requirements of the programme. Allow at least six weeks for review and approval of material approval submittals: on no account will delays to the work be accepted where caused by failure to obtain approvals of materials from the Engineer.
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The material ordering schedule shall list the following information: i. ii. iii. iv. v. vi. vii. viii. ix. x.
Schedule of Rates/Bills of Quantities reference. Material Description. Approval Date (Programme). Approval Status. Ordering Date (Programme). Ordering Status. Delivery Date (Programme). Delivery Status. Installation Dates (Programme). Installation Status.
The preliminary and detail programmes shall be accompanied by details of labour force monthly loadings for each trade, including subcontractors and supervisory staff. The Working Programme shall show the periods for installation, inspection, testing and commissioning the electrical and mechanical plant and equipment, and periods allocated for general snagging and rectification of defects. Programme to be prepared and submitted within 2 weeks. Allow at least 1 (one) week for review and approval of Material Approval Submittal. 1.5.3 Programme Priorities The programme of works shall include the following works as immediate priorities at the outset of the construction period: A site survey and preparation of site survey drawing at 1:200 scale to verify the information on the site survey drawing included in the tender documents. 1.5.3.1 Establishment of Acceptance Standards Where there are a number of similar rooms or similar elements in the project, then one of these rooms or other elements should be selected to be completed in advance of others in order that the standard of finish, or any other matter, may be commented upon. Thereby, a standard is to be set on which future inspections of similar rooms or similar elements will be based. Such areas should be programmed separately. 1.5.4 Shop Drawing Production Programme The detailed production programme shall be accompanied by a working drawing production programme. Submission of such programme shall not relieve the Contractor of any of his duties or responsibilities under the Contract.
1.6 Site Meetings Site meetings shall be held on a weekly basis or as otherwise directed by the Engineer.
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Attend with adequate representation the site meetings and all other meetings to which the Engineer has given instruction to attend. Inform and present to attend meeting(s) representative(s) for sub-contractors, suppliers, etc., if so requested by the Engineer. The Engineer will chair the meeting and be responsible for the preparation and distribution of Minutes. Hold co-ordination meetings with sub-contractors two days prior to the Site Meetings to ensure accurate reporting on progress, information, etc. Submit the following information, in writing, one day prior to each site meeting: i)
Progress report showing percentage completion scheduled and actual percentage completed for each activity of the programme.
ii) Plant and Labour reports for the month. iii) Minutes of Contractor’s Co-ordination meeting. iv) Schedule of Information requirements. v)
Updated Material Ordering Schedule
vi) Records of daily temperature, humidity and rain-fall vii) Record of Site Instructions issued since previous meeting viii) Record of Payments ix) Estimates of anticipated variations and instructions if previously requested by the Engineer.
1.7 Warranties & Guarantees All equipment and installations supplied under a manufacturer’s warranty shall be covered by warranty for the entire maintenance period and such additional periods as outlined below. The warranties are specifically required for the following elements:♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦
Roof Waterproofing Anti-Termite Treatment Ironmongery Window & glazing installation Waterproofing membranes Chiller compressor and coating External Paint System Internal Paint System
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10 years 15 years 5 years 10 years 10 years 5 years 5 years 5 years
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10 years 10years 10years
Sample form of warranty shall be submitted with the tender. The final original certificate shall be included in the O & M Manuals.
1.8
Manufacturer’s Recommended Spares
Provide all tools, keys etc. together with spare parts and consumable stores sufficient for operating all services installations for a period of one year commencing from the date of the Completion Certificate all in accordance with manufacturer’s recommendations and the Engineer’s approval.
1.9 Substantial Completion and Handover 1.9.1 Definition “Substantial Completion” is that stage in the execution of the work under the Contract when: • •
the Works or a separable part of the Works, as the case may be, are complete except for minor omission and minor defects; which do not prevent the Works or that separable part of the Works from being used for its intended purpose, and
•
in relation to which the Engineer determines that the Contractor has reasonable grounds for not promptly rectifying them, and
•
rectification of which will not prejudice the convenient use of the Works or of that separable part of the Works, and
•
those tests which are required by the Contract to be carried out and passed before the Works or the separable part of the Works, as the case may be, are handed over to the Employer have been carried out, documented and passed, and
•
Such Documents and other information required under the Contract which, in the opinion of the Engineer, are essential for the use, operation and maintenance of the Works have been supplied. This includes As-Built Drawings and Operation & Maintenance manuals.
1.9.2 Handover Programme As the works approach substantial completion, submit to the Engineer a programme outlining the main events leading up to the Final Handover Meeting to ensure that the handover arrangements proceed efficiently. The programme shall include the following events:1.
Preliminary snagging by Contractor.
2.
Preliminary snagging by Engineer/Contractor.
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3.
Final snagging inspection by Engineer/Contractor.
4.
Testing and commissioning of electrical and mechanical plant and equipment on site.
5.
Familiarization of Employer nominated operatives with the electrical and mechanical equipment.
6.
Substantial Completion Inspection of the Works by Employer/Engineer including all required submissions of manuals, drawings, spare parts, etc.
7.
Issue of the Certificate of Completion.
8.
An inspection or series of inspections (as demanded by the size and nature of the project) by Engineer and relevant technical experts to obtain clearance for occupation of the Works by the Employer.
9.
Final Handover Meeting at which the keys are handed over to the Employer for occupation of the site.
1.9.3 Documentation for Testing and Commissioning By the end of mobilization period, submit formats for the contents of all electrical and mechanical Testing and Commissioning Schedules and the layout and contents of all electrical and mechanical Testing and Commissioning Certificates. Testing and Commissioning Certificates are to be signed by the Contractor and countersigned as approved by the Engineer before issue. Certificates for electrical installations in buildings are to be in accordance with the ‘IEE Regulations - 15th Edition’. The site commissioning and test results are to establish the optimum conditions for plant and equipment and form the basis for future condition monitoring. After items of electrical or mechanical plant or equipment have been tested and commissioned copies of each of the following shall be bound into the O & M Manuals: 1. Testing and Commissioning Certificates 2. Full site performance test result sheets and reports. 1.9.4 Familiarisation with the Works Programme The Client’s staff responsible for operation and maintenance of the works after hand over, shall be given the opportunity of familiarization with the facilities including the documentation (in particular for the mechanical and electrical plant and equipment) in advance of the Handover Meeting. The Project Programme shall include for this familiarization period.
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1.9.5 Demonstration of Plant and Equipment Demonstrate the operation, regulation and general maintenance of the plant and equipment and bear all costs relating to the familiarization (including the cost of any specialist training for particular equipment). 1.9.6 Draft Documentation The following draft submissions shall be provided as early as possible in the construction period but no later than the scheduled time for familiarization with the Works: 1. One set of the Operation and Maintenance Manuals. 2. One copy of the priced list of breakdown spares (together with any special tools required) for one year operation and where appropriate also for five years operation as recommended by the Manufacturer. 3. One copy of the priced list of consumable spares (e.g. filters) and other consumables (e.g. chemicals for dosing water supply) for one year’s operation, as recommended by the manufacturer. 4. One set of prints of the electrical and mechanical As-Built Drawings. The Operation and Maintenance Manuals are required to describe the complete working system. It will not be sufficient to submit only the manufacturer’s literature for the component parts of the system, although such literature may form part of the manual. The As-built Drawings must include the modified infrastructure drawings where this is appropriate. 1.9.7 Submissions Make the following submissions on or before the date of Substantial Completion. The works shall not be considered Substantially Complete until all of these submissions have been made (draft manuals are not acceptable at this stage): 1.
Three sets of the approved Operation and Maintenance Manuals. These manuals are to include detailed descriptions of the operation of the system, and are to explain the nature and frequency of the various routine maintenance tasks. These manuals must be suitable for use on site (i.e. plastic covers, based on A4 size, capable of being laid flat when opened, fully indexed). One copy of each of the approved Testing and Commissioning Certificates, site performance test result sheets and reports, and the Testing and Commissioning Schedules (as carried out) is to be included in each set of manuals.
2.
An additional set of manuals for specialist equipment shall be supplied for the use of the specialist User.
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Additional copies of operating instructions for individual items of equipment which can be adjusted by non-specialist users (room controls for A/C’s, fire safety procedures etc.) shall be provided for each item of equipment. 3.
Three copies of the approved priced list of break-down spares (together with any special tools required) for one year operation and where appropriate also for five years operation.
4.
One set of the breakdown spares (together with any special tools required) for one year operation and where appropriate also for five years operation.
5.
Three copies of the approved priced list of consumable spares and other consumables for one year operation.
6.
One set of the consumable spares and other consumables for one year’s operation (actual delivery having due regard to shelf life where appropriate).
7.
Three sets of the keys for all locks (including floor and ground master keys where necessary), two sets of valve keys, and two sets of manhole cover lifting keys.
8.
Three sets of prints of all the approved As-Built Drawings (the electrical and mechanical ‘As Built’ Drawings must be adequate for the operation and maintenance of the facilities).
9.
Two sets of copy transparencies of all the approved As-Built Drawings to a standard suitable for photo reduction.
10. The original of all approved Testing and Commissioning Certificates (bearing the signature of the Engineer who witnessed the tests). 11. Three copies of an Asset Register for all electrical and mechanical plant and equipment requiring routine maintenance. The Asset Register is to have the following items included in the schedules: a) b) c) d) e) f) g) h) i)
Item reference number - to be assigned by Employer. Description Rating Manufacturer Model number Total quantity Unit cost - FOB at the time of purchase Purchase order no. - issued by the Contractor Identification and location: i. quantity at a given location or in a facility ii. serial no. of the equipment where applicable iii. tag number or title given to design on item or class of items (where applicable) iv. location of facility j) As-Built Drawing reference.
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1.9.8 List of Outstanding Work a) Prepare three copies of the list of outstanding work. This list is to include all items which are still outstanding at the date of Substantial Completion, and which are to be finished by the Contractor during the Period of Maintenance in accordance with the programme set by the Engineer. Unless there is good reason for the contrary, it is expected that the outstanding work would be satisfactorily completed within at least 28 days of Substantial Completion. b)
The items on this list must be relatively minor items of outstanding work or the making good of minor defects in the work already completed. Items of plant and equipment, any other items where the full Period of Maintenance is required, are not to be included on this list, but shall be considered as work required to be completed before the issue of the Certificate of Completion. However, this does not necessarily preclude the certification of completion of stages as defined in Clause 48(2) of the Conditions of Contract.
c)
Attention is drawn to the amendments to the Standard Conditions of Contract requiring the Engineer to set a programme for the completion of the outstanding work and the remedy on the Contractor’s failure to carry out such work within the set programme.
1.9.9 Completion by Stages If there are any outstanding items of work of such a nature that a separate Maintenance Period is required, such items shall be included on a list of outstanding work, for each stage. 1.9.10 Final Handover Meeting a) The final Handover Meeting is to enable the works to be handed over by the Contractor to the Employer for occupation of the site. At this meeting the keys are to be handed over to the Employer. b) The Handover Meeting shall take place after all the necessary inspections have been completed after issue of the Completion Certificate. c) The following parties shall be represented at the meeting: 1) The Contractor 2) The Engineer 3) The Employer
1.10 Period of Maintenance 1.10.1 Division of Responsibilities The Contractor’s responsibilities during the Period of Maintenance are clearly defined in the Conditions of Contract. The Employer shall be responsible for
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routine maintenance and operation of the works, making good fair wear and tear, and any repairs not considered to be the liability of the Contractor (e.g. damage to the works by the User). 1.10.2 Rectification of Defects a) The Engineer will inform the Contractor in writing of those minor defects for which the Contractor is responsible for making good. Non urgent repairs must be carried out within 10 days of notification to the Contractor or, if this not possible, within a programme to be set by the Engineer. b) Where there is not a need to have defects repaired immediately, then depending on the number and importance of these defects, the Employer will group them so that the Contractor is called back to the Site to carry out the work as few times as possible. For most practical purposes it would be satisfactory to clear the outstanding defects at (say) three monthly intervals. Emergency repairs must be carried out immediately. c) Keep a register of all requests showing the date of the request, and the date on which the work was satisfactorily completed. 1.10.3 Inspection Prior to End of Maintenance Period By approximately one month before the end of the Maintenance Period, all outstanding items shall be completed, and a joint inspection will take place. 1.10.4 Notice by the Contractor Inform the Engineer in writing as soon as all the outstanding defects have been remedied and the works have been satisfactorily completed and maintained in accordance with the Conditions of Contract. The Engineer will inspect the works and reply confirming agreement or pointing out any defects that have still to be remedied prior to issue of the Maintenance Certificate.
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Plasterwork and Floor Screeds
2.1 General 2.1.1 Scope of Work This section of the specification covers all internal and external plasterwork including “render” and floor screeds. The specification for roof screeds is included under section 7 - Membrane Roofing. 2.1.2 Relevant British Standards Conform to the recommendations made by the following British Standards where applicable: BS 12 : 1978
Ordinary and Rapid hardening Portland cement
BS 890 : 1972
Building limes
BS 5492 : 1990
Code of Practice for internal plastering.
BS 882 : 1992
Aggregate from natural sources for concrete
BS 1202
Specification for nails
BS 8000 : 1989, Part 9
Code of Practice for cement/sand, floor screeds and concrete floor toppings.
BS 8000 : 1989, Part 10 Code of Practice for plasticizing and rendering BS 1199 : 1976
Sands for external renderings and internal plastering with lime and Portland cement.
BS 1369 : 1987
Metal lathing (steel) for plastering.
BS 4887 : 1986/87
Mortar admixtures
2.1.3 Co-ordination Check and verify the positioning and fixing of all conduits or other similar items which are to be concealed by either plaster or render or screed. Ensure
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that such items requiring testing have been satisfactorily tested and approved by the Engineer before plasterwork is commenced. 2.1.4 Material Storage All branded materials are to be delivered to the site in their original packages bearing the trade names of the material concerned. Cement, hydrated lime and similar materials shall be stored off the ground, under cover and away from all possible source of damp. Store sand under clean conditions to prevent contamination by soil or other deleterious substances. 2.1.5 Shop Drawings Submit shop drawings showing the position of all external wall render and movement joints for the approval of the Engineer. 2.1.6 Literature and samples In the case of proprietary products submit comprehensive technical literature for the Engineer’s prior approval. When so requested by the Engineer, prepare samples of plasterwork and/or render for his approval. Samples to be a minimum of 10m2 in area for rendered surfaces and complete at least 1m2 with the required finish.
2.2
Materials
2.2.1 Cement Ordinary Portland cement complying with BS 12 : 1978 2.2.2 Lime Comply with BS 890. Quicklime's to be slaked in a manner appropriate to their type. Non-hydraulic and semi-hydraulic limes may be used dry or preferably soaked to a putty 16 hours before use. 2.2.3 Sand for plastering/rendering Comply with BS 1199. Sand to be hard, clean and free from deleterious matter likely to affect adversely the hardening, strength, durability of appearance of the plaster. 2.2.4 Fine aggregate (including sand) and coarse aggregate for screeds Comply with BS 882. 2.2.5 Water Clean potable water free from harmful matter and from any unusual proportion of dissolved salts. Sea-water or brackish water shall not be used.
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2.2.6 Metal lath, corner/stop beads etc Proprietary expanded aluminium or galvanised steel lath internally, stainless steel externally, with associated accessories. Building paper shall conform to BS 1521 Class B. Steel lath to comply with BS 1369. 2.2.7 Mortar plasticizers Mortar plasticizers shall comply with BS 4887. 2.2.8 Nails Nails shall be clout headed galvanised nails to BS 1202. 2.2.9 Metal Lathing Metal lathing for plastering shall be galvanised expanded steel complying with BS 1369.
2.3 Execution 2.3.1 General All plasterwork shall be executed in a neat and workman-like manner all to the approval of the Engineer. Conform to the recommendations of BS 5492 in regard to plastering. 2.3.2 Screeds
a) Jointing, Setting out of Bays Screeding under in-situ flooring shall be carried out in accordance with the general recommendations and BS 8203 & BS 8000, Part 9 in the case of resilient and hard flooring materials respectively. Cement and sand screeds which are to be covered with linoleum, vinyl or other thin material shall be laid in strips approximately 3m wide. Other joints shall coincide with joints in the concrete base. The fill-in bays in this system shall not be laid until the alternate bays have hardened.
b) Preparation To ensure proper bond any laitance on the concrete base slab shall be removed by scrabbling. Remove all dust and completely clean entire surface of base slab and keep well wetted for several hours before laying screed/topping. Remove free water and then brush in cement slurry or prime as necessary and use a bonding agent in accordance with manufacturer’s recommendations. Intended method to be agreed with the Engineer prior to commencing work.
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Cover any pipes, floor trunking etc. with a strip of heavy gauge expanded metal lathing or light gauge steel reinforcing fabric 500mm wider than the embedded item.
c) Granolithic Screed Granolithic flooring finishes laid thicker than 40mm shall be laid in two courses of which the upper shall be at least 18mm thick. Both courses shall have the same mix proportions including water-cement ratio. The lower course shall be thoroughly compacted and the upper course then immediately placed on it. After topping has been fully compacted, trowel surface at least 3 times at intervals during the next 6 to 10 hours to produce a uniform hard surface, free from laitance and with as much coarse aggregate as possible just below the surface. Form skirting and up-stands etc. by trowel or formwork as appropriate on wellkeyed backgrounds to required thickness and profiles. Thoroughly bond to the floor layers and form neat angles and junctions.
d) Sand/Cement Screed Floor screeds shall be mixed in the volume of 3 parts sand to 1 part cement by weight. They shall be finished flat and smooth with a wood float if required to receive a further finish. Screeds for carpet shall be finished flat and smooth with a steel trowel. Generally screeds shall be laid in bays not exceeding 12 square metres and in strips not exceeding 4.5m in width and/or 15 square metres. Joint allocations to be approved by the Engineer prior to starting work. Screeds should be laid to the thickness shown on the Drawings or to falls as shown for areas which drain. Where a level screed is required variation in level should be limited to ± 3mm under a 3m straight edge. The cement-sand ratio shall be 1:3 by volume. If laid within three hours of the placing of the base, or lesser time in hot weather, the screeding shall be not less than 12mm and not more than 25mm thick. The screed shall be brought to a smooth and even surface to the required levels. Where the screed is to be laid on a set and hardened concrete base the screed shall not be less than 40mm thick and the base shall be prepared as described in Sub-Clause (b). Where the screed is not bonded to the base its minimum thickness shall be 50mm. Screeds over 40mm thick shall be formed in fine concrete of mix proportions 1:1:5:3 cement-sand-coarse aggregate (10 mm maximum) and shall be brought to a smooth and even surface to the required levels. Screeds less than 80mm thick, to be laid in one layer. For screeds over 80mm thickness lay in two layers, the first being not less than 20mm thick and the second being placed immediately after compaction of the first layer.
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Compaction of screeds to be carried out by approved mechanical means. Areas inaccessible to such equipment may be steel trowel compacted and floated manually. Bring surface to a smooth uniform finish free from defects and blemishes to provide a satisfactory surface to receive the floor finish required. Where cement and sand screeds are to receive terrazzo, clay or ceramic tiles the screed shall be finished with a slightly rough finish to accept the cement paste and tiles. Check levels to ensure compliance with the requirement of the Drawings. Permitted tolerance will be 3mm in 3000mm in any direction. e)
Consistency of Mixes - Water Cement
The water content of the mixes used for cement and granolithic finishes shall be the minimum necessary to permit spreading and compaction. f)
Service Penetrations
Pipes and/or conduits shall not be cast into the screed without the Engineer’s prior approval. Should they be required they must have reinforcement overlaid as described in part (b). g) Laying The screed should be laid while the slurry or bonding agent is still wet. Ensure that it is well compacted. The screed should be cured by closely covering screeded areas with polythene sheeting as soon as the screed is set and keeping this in position for 7 days. The screed should be kept damp during the curing period and wetted whenever necessary to achieve this. During laying of screeds all existing work should be adequately protected against spillage, staining or any other damage. h) Curing As soon as the trowelling is completed maintain the concrete in damp condition for at least seven days with waterproof sheeting well lapped and kept in close contact. Thereafter ensure drying out continues slowly; protect from heat or any other conditions that might accelerate the drying. i) Monolithic Finish Monolithic finish to concrete floor slabs shall comprise carborundum dust evenly sprinkled on whilst the concrete is still green at a rate of not less than 1 kg/m2 and lightly trowelled in before final finishing. j) Bathrooms In bathrooms and W.C’s the structural slab shall first be treated with 3 coats of a waterproof membrane before application of screeds and tiling. The
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membrane shall extend around all walls to a height of 150mm above finished floor level. The membrane shall be applied in accordance with the manufacturer’s recommendations. A 10 year warranty shall be provided. 2.3.3 Plastering/rendering a) General Plastering/rendering will be carried out in accordance with BS 8000, Part 10 and BS 5492. Remove ridges and other imperfections from shuttered concrete surfaces before cleaning down. All surfaces to receive plaster/render to be thoroughly clean and free from any extraneous material which would adversely affect the plaster/render bond. Roughen smooth surfaces to ensure a keyed bond to plasterwork. Thoroughly wet block work, concrete and other similar surfaces before plasterwork is commenced to reduce suction. b) Metal lath, corner/stop etc. All plasterwork stop ends, junctions with other materials and corners to have appropriate metal stop and corner beads. Expanded metal lath to be installed where shown on the Drawings or as instructed on site by the Engineer. Provide such reinforcement to cover all construction joints, electrical conduits and service pipes running within walls. Metal lathing shall be fixed with galvanised steel staples with joints lapped 40 mm and tied with galvanised or stainless steel wires. The long way of the mesh should be at right angles to the supports. The slope of the strands should be all in one direction which for vertical work should be inwards and downwards. c) Plaster/render mix proportions All materials used for plasterwork shall be proportioned by volume by means of gauge boxes as follows: Internal plastering : 1 : 1 : 6 (Cement:Lime:Sand) External rendering : 1 : 3 to 4 (Cement : Sand) Note: Lime putty may be added if required to improve workability but to a proportion not exceeding ¼ of that of cement by volume. 2.3.4 Mixing of plaster/render/screed Except where hand-mixing of small batches is approved by the Engineer, mechanical mixers of an approved type shall be used for the mixing of plaster. Caked or lumped materials shall not be used. Mechanical mixers, mixing boxes and tools shall be cleaned after mixing each batch and kept free of plaster from previous mixes. Plaster shall be thoroughly mixed with the proper amount of
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water, uniform in colour consistency. Re-tempering will not be permitted and all plaster which has begun to stiffen shall be discarded. Hand mixed plaster shall be first mixed in the dry state being turned over at least three times. The required amount of water should then be added and the mix again turned over three times or until such times as the mass is uniform in colour and homogeneous. Plastering mix containing self-setting materials shall be used up within the recommended working time for the mix concerned. Mixes containing cement shall be used up within two hours of the first contact of the cement with water. All material remaining after this period shall be discarded. 2.3.5 Handling and Storage Metal lathing shall be stored in dry conditions and protected from damage. 2.3.6 Mixing Hand mixed plaster shall be first mixed in the dry state being turned over at least three times. The required amount of water should then be added and the mix again turned over three times or until such times as the mass if uniform in colour and homogeneous. Plastering mixed containing self-setting materials shall be used up within the recommended working time for the mix concerned. Mixes containing cement shall be used up within two hours of the first contact of the cement with water. All material remaining after this period shall be discarded. 2.3.7 Application of plaster/render Unless indicated otherwise on the Drawings the thickness of plaster/render shall be as follows: Internal walls
2 coats, total 15mm thick
Exposed Internal ceilings, soffits
2 coats, total 12mm thick
External render
2 coats, total 20mm thick
Carry out a sample for approval of each type of render on a suitable wall of approximately 10m2, including 1m2 with a final finish, as a test panel for approval before continuing the operation. 2.3.8 Curing of plaster Allow adequate ventilation to remove excess moisture from the plaster and keep it moist in accordance with the recommendations of BS 8000, Part 10 for curing; do not allow the render to dry out too rapidly. Under no circumstances use membrane methods of curing.
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2.3.9 Defects in plaster/render Defective areas of plaster/render to be carefully cut out to rectangular shape, using sharp chisels and taking care not to loosen adjacent material, the edges undercut to form dovetail key; apply bonding agent and allow to cure, re-plaster in accordance with the specification, allowing adequate time for drying between coats and finish flush with the face of surrounding plasterwork.
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Membrane Roofing
3.1 General 3.1.1 Scope of work Supply and installation of roof screed, protected waterproof membrane, insulation and protection for flat roofs. 3.1.2 Relevant Standards Conform to the recommendations of the following British Standards where applicable: BS 1470 : 1987
Specification for wrought aluminium and aluminium alloys for general engineering purposes.
BS 6229 : 1982
Code of practice for flat roofs with continuously supported coverings.
BS 8000 : 1989, Part 4
Code of Practice for waterproofing.
3.1.3 Submittals Submit to the Engineer for his approval at least 60 days prior to use, proposals for the complete roofing systems together with full specifications, technical literature and samples. Evidence must be provided of three successful installations of a similar nature which are at least ten years old. The roofing system is to be approved in writing by the Engineer before commencement of the work, and the work is to comply in all respects with the approved specification. 3.1.4 Co-ordination Check and verify the positioning and fixing of all conduits and other items which are to be concealed or laid within the screed thickness. Ensure that such items requiring testing have been satisfactorily tested and approved by the Engineer before screeding is commenced.
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3.1.5 Workforce All roofing works are to be carried out by competent operatives skilled in this particular work. Roof membrane shall be applied by an approved specialist subcontractor. 3.1.6 Guarantee Completed waterproof membranes shall be guaranteed for a period of not less than ten years from the date of contract completion. Should any damage occur to the building or its contents as a result of faulty materials or workmanship, the Contractor shall make good such defects to the satisfaction of the Engineer.
3.2 Materials 3.2.1 Cement Ordinary Portland Cement complying with BS 12:1978, or Omani Standard No. OS 07. 3.2.2 Fine Aggregates Sand for use in roof screed shall comply with the requirements for sand for concrete as specified elsewhere herein. 3.2.3 Coarse Aggregates Aggregates for use in roof screeds is to be 10mm and shall comply with the requirements for aggregate for concrete as specified elsewhere herein. 3.2.4 Water Clean potable water, to conform to Concrete Works specification. 3.2.5 Roofing Membrane The roof membrane shall be “Bituthene 8000 HC” manufactured by GRACE or equal and approved. Proprietary high performance 1.5mm thick solar reflective roof cold applied, flexible pre-formed waterproofing membrane comprising a four layer cross laminated high density HDPE carrier film with a solar reflective surface and a self-adhesive rubber/bitumen compound which conforms to the following requirements: Property Tape Strength Tensile Strength Elongation Film
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Test Method ASTM D638 ASTM D638 ASTM D638
Typical Value Long
5.2 N/mm
Trans
5.8 N/mm
Long
40 N/mm2
Trans
36 N/mm2
Long
200%
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170%
Elongation Compound
ASTM D638
125%
Tear Resistance
ASTM D 1004
Long
270 N/mm
Trans
270 N/mm
Adhesion to Primed Concrete
ASTM D 1004
1.8 N/mm
Adhesion to Self
ASTM D 1000
1.8 N/mm
Puncture Resistance
ASTM E 154
290N 65mm
Water Resistance
ASTM D570 after 24 hrs after 35 days
0.14% 0.94%
Environmental Resistance
ASTN D543
Conform
Moisture Vapour Transmission Rate
ASTM E96
0.2 g/m2 / 24 hrs
3.2.6 Membrane related Products and Appurtenances All products and appurtenances associated with the roofing membrane are to be proprietary items as supplied or recommended by the membrane manufacturer. Examples include solar reflective membranes and paint, surface primers, fillets, mastic sealants and flashings. 3.2.7 Insulation 600 x 1200 x 50mm thick proprietary extruded closed cell polystyrene rigid foam, with skin, and rebated edges. The material shall have the following properties: 1. Five year aged average thermal conductivity of 0.032 W/mk when tested at 24oC in accordance with DIN 52612 or ASTM C-518. 2. Compressive strength of 280kPa average, when tested according to DIN 53421 or ASTM D-1621. 3. Water absorption of 1% in volume average when tested in accordance with ASTM D-2842. 4. Water vapour permeability of 0.6 perm inch average when tested in accordance with ASTM C-355. A minimum density of 33 kg/m3. 3.2.8 Flashings 1 mm thick super purity aluminium sheet to BS 1474.
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3.2.9 Separation Layer Polyester based synthetic fibre mesh. 3.2.10 Gravel 15 to 30mm diameter smooth edged wadi gravel. 3.2.11 Paving Slabs 400 x 400 x 50mm thick proprietary white precast concrete paving slabs.
3.3 Execution 3.3.1 Preparation for Screeds Concrete surfaces which are to receive screeds are to be thoroughly “scrabbled” preferably by mechanical means to form a regular rough texture. A tamped finish will not be accepted. Thoroughly clean the concrete surface and ensure that it is free from all loose particles and other extraneous matter which would adversely affect the adherence of the screed material. Spray concrete surface with water to thoroughly wet the surface to be screeded. Allow free water to drain before screed application. 3.3.2 Lightweight Roof Screeds Flat roofs shall be covered with a lightweight concrete roof screed which shall have a maximum density of 500 kg/m³ consisting of cement and sand with a foaming agent. Light weight aggregate may also be used. The work shall be carried out by a specialist agency approved by the Engineer strictly in accordance with the manufacturer’s recommendations. The roof screed shall be laid to falls to ensure adequate run-off or rainwater and to prevent ‘ponding’. The minimum thickness shall be 50mm and the screed shall be laid in alternate bays of exceeding 3000mm in any direction. The screed roof shall be thoroughly brushed clean of all dirt, loose stones etc. Any small cracks shall be filled with an approved tropical grade thixotropic cold bitumen emulsion with added rubber latex. The screed surface to be waterproofed shall be even and smooth with any high spots knocked back and local depressions and sudden changes filled with epoxy mortar or similar high strength mortar to present a true surface. All sharp projections and arises caused by formwork etc. shall be ‘scrabbled back’ to give rounded corners. Primer shall be touch dry prior to the application of one layer of the membrane. The primer must not be poured onto the surface and care must be taken to avoid ponding in depressions. All internal angle fillets shall be preformed triangular black PVC 50mm x 50mm extrusions with a wall thickness of 5mm, and shall be coated on two faces adjacent to the corner, protected by silicone coated release paper. The material shall be of a grade suitable for use in hot climates.
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External corners shall be trowelled to provide a 25mm x 25mm splay. Where the membrane is to be terminated at an up stand, a 25 x 20mm deep splayed chase shall be provided. The chases shall be thoroughly clean and dry, and all dust, dirt, laitance etc removed from the faces by wire brushing and compressed airline. All inside and outside angles shall be provided with an additional 300mm wide reinforcing strip of the membrane centred along the axis of the corner, prior to laying of the main membrane. 3.3.3 Roofing Membrane Installation of roofing membrane shall be carried out in strict accordance with the manufacturer’s written instructions. Ensure substrate is laid to the correct falls as shown on the drawings. Thoroughly clean the surface which is to receive roofing membrane. Ensure surface is dry and clear of loose particles and grease. All roof up stands, parapets, service penetrations and expansion joints are to be constructed in accordance with the standard details as instructed on the drawings, or as recommended by the membrane manufacturer. Reinforce all inside and outside angles, and other vulnerable areas with an additional 300mm wide membrane strip prior to laying of the main membrane. Dress the roofing membrane into the roof rainwater outlets, which are to be of a design to allow draining both at membrane level and at the top of the roof tiles. Prior to covering the completed membrane request the Engineer to make an inspection. Clean and patch any damaged areas to the approval of the Engineer. 3.3.4 Roof Insulation Boards Lay boards in accordance with the manufacturer’s instructions, in a brick bond pattern. Where the tiles are laid over a change or roof slope they shall be neatly cut with a saw along the line of the change in roof plane. The joint shall leave a small gap. Cut the tiles carefully around up stands, pipe work and roof mounted plant. Alternatively in order to avoid small cut pieces the tiles may be set out to create a space round the up stand or pipe work which may then be filled with gravel or ballast. 3.3.5 Separation Layer Lay a separation layer loose over the entire area to be insulated, carefully trimming and allowing a 50mm up stand at parapets, pipe penetrations, rainwater outlets, etc. Lap joints at least 300mm. 3.3.6 Gravel Spread gravel over the areas indicated on the roof plans to a thickness of about 50mm to provide a neat even finished surface.
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3.3.7 Paving Slabs Where indicated on the roof plans lay paving slabs with tight but open joints, secured in place with 1:6 cement: sand mortar dabs. 3.3.8 Pipes and Services through Roof Slabs All waste stacks, ducts and pipes penetrating the roof slab are to be weatherproofed in accordance with the Architects details, consisting of a block work up stand and concrete slab with the pipe turned through 90 degree. Plinths for equipment shall be built off the roof slab prior to commencing roof waterproofing. Plinths supporting pipe runs and cable trays may be built off the roof slab or precast plinths may be located on top of the insulation prior to laying paving slabs. 3.3.9 Testing All horizontal roofing areas shall be water flood tested prior to the installation of the protection course. No areas shall be water tested less than 72 hours after application of waterproofing membrane. Water testing shall include flooding of the entire area either by section or in its entirety to a depth to be agreed with the Engineer for a minimum period of 72 hours.
3.4 Protection The Contractor shall employ whatever methods are required to protect the roof at all times, up to the building handover, from damage from any cause whatsoever, and make good any such damage at his own cost.
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Carpentry and Joinery
4.1 General 4.1.1 Scope of Work The scope of work includes the following: Manufacture and installation of: • • • •
Doors and door frames Counters and vanity units Fitted kitchen units (where required) Miscellaneous timberwork and specialist joinery
All in accordance with drawings. The doors should further comply with the specific sections of this specification. 4.1.2 Standards Comply with the following standards where relevant and to the extent stated here. •
BS 5268 : 1991
Structural Use of Timber
•
BS 1186 : 1988-91
“Timber for & Workmanship in Joinery”
•
BS EN 942 : 1996 Timber Quality.
Timber in Joinery - General Classification of
•
BS 8000:1990, Part 5 General Fixings.
Code of Practice for Carpentry, Joinery and
4.1.3 Setting out All work is to be set out and constructed to the dimensions given and to the full intent of the drawings and specifications. Check dimensions on site before cutting or pre-fabricating components. In general, site dimensions will take precedence over drawings, the Engineer’s approval is however required in such cases.
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4.1.4 Shop Drawings Do not commence manufacture of joinery components without the prior approval of the Engineer and his agreement to the shop drawings. Details of construction shown on drawings prepared by the Engineer may only be altered with the prior agreement of the Engineer. All work including joint types, fixings, etc must be detailed on shop drawings and approved by the Engineer before manufacture. 4.1.5 Samples Prior to general manufacture, full size samples of each type of timber construction must be fabricated and installed in order to approve all parts of the process. 4.1.6 Joinery in General Unless otherwise specified, all joinery is to be purpose made, worked to detailed drawings where provided and constructed in accordance with approved best practice. It shall be mortised and tenoned, dowelled, dove-tailed, tongued, grooved, glued, pinned, screwed etc. as necessary and best suited for the particular purpose.
4.2 Materials 4.2.1 Timber Generally All timber shall be sound, thoroughly seasoned, of mature growth, clean sawn, square-edged, free from sap, ring shakes, cracks, splits, large, loose or dead knots, boxed heart, wanly edges, insect attack, fungus growth, rot, dote or incipient decay, stained sapwood and other defects and shall be to the approval of the Engineer. Timber shall be straight and true; any warped or twisted timers will be rejected. All materials and components are to be stacked on suitable bearers clear of the ground and protected from the weather until they are fixed in position. If necessary provision shall be made for temporarily covering or otherwise protecting materials and components after they have been fixed in position 4.2.2 Hardwood for Internal Use Unless otherwise specified, selected Beech (Fagns Sylvatica) or Cherry complying with the requirements of BS EN 942,Class J2 without sapwood. Density to be approximately 700 kg/m3. 4.2.3 Hardwood for External use Unless otherwise specified, selected Meranti Nimusu complying with the requirements of BS EN 942, Class J2 without Sapwood. Density to be approximately 700 kg/m3.
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4.2.4 Exposed Timber All faces of timber which will be exposed when the building is complete shall be wrought and shall have been selected as to quality of face. Grains shall be parallel to the length under max 60% degrees. 4.2.5 Pressure Impregnation All Meranti timbers shall be vacuum treated for termite resistance and preservation. Timber shall be impregnated by Hickson Vac-Vac process to achieve an average loading of 40 litres “Vascol WR” preservative per m3 of timber or equal. All ‘cut ends’ joint forming, planning and/or any on-site cutting shall be liberally treated with Hickson “Vasele” end grain preservative. 4.2.6 Moisture Content of Timber Timber shall be properly and carefully air seasoned to 20-25% moisture content prior to kiln drying. The moisture content shall be suitable for the situation of the finished timber but shall be limited to 11% ± 2% for internal use and 13% ± 2% for external work. When fixed in position the timber shall remain stable and free from any expansion or contraction or other movement which will detract from the satisfactory performance or required appearance of the element. The timber shall be free from any drying defects whatsoever and there shall be no indication of shrinkage. The Contractor shall replace at his own expense any timber which has been damaged or shrunk on finished work caused through the use of imperfectly seasoned timbers. Immediately before manufacture the moisture content of timber should be ascertained using an electrical moisture meter to manufacturer’s recommendations. Test 5% but not less than 10 lengths of each cross-section; average results shall be in the centre of the specified range. During delivery, storage, fixing and thereafter to practical completion maintain conditions of temperature and humidity suitable for specified moisture content(s) of timber components. The moisture content at the time of matching to the dimension indicated shall conform to the requirements of the said standard specification for the kiln drying of timber, for items customarily kiln dried. The timber in any consignment shall be deemed to be satisfactorily kiln dried if upon inspection of representative samples drawing from the consignment, tests indicate that for: Interior use/Interior joinery and door stock - At least 90% of the samples shall have a moisture content not exceeding 11% and the remaining samples shall have a moisture content not exceeding 13%.
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Exterior joinery - At least 90% of the samples shall have a moisture content not exceeding 13% and the remaining samples shall have a moisture content not exceeding 15%. The Engineer may require the Contractor to submit timber for testing. The Contractor shall replace joinery in which defects occur through improper moisture content. 4.2.7 Timber for Joinery The Contractor shall carefully select the timber for joinery so to minimise disfiguring defects on finished faces. 4.2.8 Plywood Plywood shall conform to the requirements of BS 1455:1972 grade 1 where varnished, grade 2 where painted, grade 3 where hidden. All plywood shall be obtained from an approved manufacturer. All plywood shall be resin bonded external quality. Both faces of all plywood shall have a fine sanded finish and be free from all knots except those which are sound and tight and exceeding 12mm diameter. Plywood shall, in addition to the general specification requirements for timber, be free from all defects such as lifting at the edges, blistering, surface cracks, sinking or raising of the surface due to defects in the base material and no patches or plugs will be permitted. 4.2.9 Fixings Nails shall comply with BS 1202. Wood screws shall comply with BS 1210. All other fixings shall comply with the requirements of the relevant British Standard or be of a good merchantable quality approved by the Engineer. Any metal screws, bolts, nails, fastenings, fixing devices etc. used in the construction or fixing or joinery work to be located externally, shall be of stainless steel. All brad nails, etc. shall be best quality of appropriate gauge, strength and shall be long enough to enter the second timber for at least half their length before punched. Screws shall be of sufficient length and gauge for their purpose. Screws for door furniture and other ironmongery shall be of material and pattern to match the various fittings. All screws for interior use shall be solid brass counter-sunk, flathead wood or twin fast screws. All nails and bolts for internal use shall be galvanised. All necessary fastenings and fixings are deemed to be included in the works even if not specifically mentioned in the drawings and specification. All necessary means of support and connection are deemed to be included in the works even if not specifically mentioned in the drawings and specification. 4.2.10 Adhesives Adhesives for external work shall be synthetic resins and comply with the requirements of BS 1204 : Part 2:1979 for the BR grade except that when glue lines are exposed to the weather they shall be of WBP grade.
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Adhesives for internal work shall be synthetic resins complying with the requirements of BS 1204 : Part 2 and shall be MR or INT grade unless otherwise specified.
4.3 Execution 4.3.1 General Timber for carpentry work shall be carefully sawn square and shall hold the full dimensions shown on the drawings. Softwood used in carpentry shall be put together with steel nails except where specified as framed when it shall be properly jointed and held together with glue and screws. Timber, used for joinery work shall be finished wrot to the exact size shown on the drawings and no joinery shall be built in until inspected and approved by the Engineer. All work shall be carefully put together and properly jointed in accordance with best practice: all joints shall be glued and screwed or dowelled. Any screws appearing on face work shall have the heads let in and be pelleted unless specified otherwise. All exposed rises in joinery work shall be pencil rounded. All timber before being built-in shall be given specified coats of wood preservative or priming. Joinery generally shall comply with the requirements of BS 1186: Part 1 for quality of workmanship and shall whatever possible be fabricated and assembled prior to delivery on site. Joinery work is to be accurately set out framed and executed directly after the commencement of the building, but it is not to be wedged up until it is required for fixing in position. All exposed surfaces are to be wrot. Except where the work is to be built-in obtain all dimensions for joinery works from the building structure. Carpentry work which does not form an essential part of the structural fabric shall not be carried out nor brought onto the building site until required. Provide and maintain all temporary covering, and box in and protect all work liable to damage, and shall provide temporary doors where necessary during the progress of the work. Ensure that the work of other trades is properly arranged to obtain the best results both in the joinery and in other trades involved. Take all necessary measures to check or prevent capillary penetration of water in the joints and open connections of external joinery works. 4.3.2 Dimensions Timber for joinery is to be wrote or moulded on all faces to the dimensions and shapes shown on the drawings or otherwise specified. Where nominal dimensions are given a deduction of 4mm for each wrote or moulded face shall be allowed. Full size details shall be held to show actual finished sizes unless otherwise stated.
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4.3.3 Moisture Movement Precautions shall be taken, as far as possible to minimise the effect of moisture movement. These may include sealing the ends and concealed faces of timber and the edges and faces of sheet materials and assembling with slotted fixings to minimise distortion. 4.3.4 Joints Where joints are not specifically shown on the drawings they shall be of the recognised and accepted form for their location and purpose. All joints shall comply with the requirements of BS 1186: Part 2 in principle or detail. All joints shall be put together with a suitable adhesive or filler. All joints exposed to the weather shall be sealed, or otherwise protected to prevent the ingress of water. All nails, sprigs, pins, etc. are to be punched below the surface and stopped with putty in the case of joinery which is to be painted and with a suitable hard stopping matching final finish in all other cases. Timbers are to be in one piece of the length required wherever possible. Where joints in the length are unavoidable, timbers up to 75mm in depth are to be halved and timbers exceeding 75mm in depth are to be splay scar fed. Joints are to be so constructed that they will resist the stresses and transmit the loads to which they will be subjected and shall be to the approval of the Engineer. Joints are to be accurately formed and tight fitting and secured with an adequate number of screws and nails of the correct length properly clenched at right angles to the grain, unless bolted joints are specified. The jointing surfaces of all connections exposed to the weather are to be thickly primed with approved priming paint immediately before the joint is made. Wherever possible in brandering, battening and similar members' length joints shall be formed over the points of support. All joints of architraves, skirting, etc., at angles shall be neatly mitred and all mouldings at tee inter-sections shall be neatly scribed. All joinery work which is to be painted is to be prepared and primed in accordance with the specification immediately after it is ready for fixing. The jointing surfaces of all connections of joinery to be painted are to be thickly primed with approved priming paint immediately before the joint is made. Where external joinery has to have glued joints, an approved waterproof adhesive shall be used. All nail heads are to be punched and screws countersunk. Where a bolted joint is specified, it is to be made with screw bolts with nut and two washers or as specified and approved. Nuts are to be well tightened but not to the extent of damaging the timber under the washer. 4.3.5 Nailing Wire nails, unless otherwise specified, shall be of the greatest diameter practicable consistent with their spacing and the avoidance of splitting. Where necessary to avoid splitting lead holes of a diameter not greater than 80 percent of the diameter of the nail shall be bored. Nails which are described to be clenched shall be of a length not less than 10 mm greater than the total
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thickness of the timbers to be fixed and the points shall be bent at right angles to the grain and hammered flush with the surface. 4.3.6 Screws Woodscrews shall be of the length, gauge and type and at the spacing given in the drawings. Alternatively and when not otherwise specified, screws shall be of a length to engage all pieces being fixed and give a point side penetration of not less than seven times the diameter of the screw. Lead holes of a diameter not greater than 90 percent of the diameter of the root of the thread adjacent to the shank shall be bored for all screws and the screws shall be screwed home with screwdriver for their full length. 4.3.7 Fixing to Block work & Concrete The whole of all timbers in carpentry work which are in contact with walls or concrete are to be thoroughly brush coated before delivery to site with two coats of wood preservative. All timber which is cut after being treated is to be re-treated with two coats of preservatives. Where carpentry or joinery work is to be fixed to concrete or block work, the latter shall have neat mortises made of the required depth which shall be plugged in accordance with the best practice ready to receive proprietary expanding plugs/bolts. Ensure adequate penetration of masonry bolts into masonry; do not fix expanding bolts near edges of masonry; use resin anchors instead. 4.3.8 Bolting Bolts are as follows: a) Use bolt lengths that will project at least one complete thread beyond the head of the nut without undue tightening. b) Drill holes at right angles to the faces being brought together. c) Drill holes slightly larger than bolt diameters unless timber has dried to the moisture level in service. d) Use large thick washers under head and nut. e) Do not split out the timber on the reverse side when drilling. If necessary to prevent this, drill from both sides after a small lead hole. f) Tighten so that washers just compress the timber. Do not tighten so much that the washer or timber deforms. 4.3.9 Straps and Anchors a) At each timber contact fix with a minimum of two screws when the number not detailed.
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b) When strapping joists and rafters, and so on, use straps to span at least two members. c) When strapping to masonry, block any gaps between timber members and masonry. d) Ensure that any strap taken into a masonry wall cavity is turned down tight against the inner skin for an adequate distance. e) When fixing straps to tops of masonry walls (for example, lateral restraint at gables) ensure that the fixing is not limited to a small masonry unit (such as a cut block, a single brick). f) Ensure that all faces intended to be in contact are in close in contact without unspecified bending and improvisation. 4.3.10 Joist Hangers Unless otherwise indicated, use screw-to-wall hangers. Select hangers of the correct size to fit the timber and to suit the loadings. Fix as follows: a) With all supporting or fixing surfaces in close contact with the background and the timber being supported. A 6mm (max) gap is permitted between end of joist and hanger back plate. b) Nail to the timber being supported through all pre-drilled holes. c) Ensure joists are properly levelled and undertake any unavoidable notching carefully and accurately. 4.3.11 Framing Anchors Subject to approval of the proposed type and locations, framing anchors may be used instead of timber joints. 4.3.12 Wall Plates If possible fix wall plates in one piece between changes of direction; otherwise make 100mm lap joints. Bed in mortar truly level and fix with straps where necessary. Plug and screw or strap to lintels. 4.3.13 Bearings Bear timbers in full contact on designed supports. Liberally coat with preservative ends built into masonry. Protect from contact with potentially damp surfaces and structures by DPC, where packing are necessary use material that will not rot or compress. 4.3.14 Fixing to Aluminium Where aluminium components are fixed to joinery work, aluminium or cadmium plated steel screws and washers are to be used.
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4.3.15 Exposed Fixings All nails heads should be punched below timber surface which will be visible in completed work. Holes to be stopped with approved filler. 4.3.16 Pelleting Countersink screw heads 6 mm below timber surfaces which are to be clear finished. Glue in grain matched pellets not less than 6 mm thick and cut from matching timber. Finish off flush with face. 4.3.17 Plugging Locate specified plugs accurately into drilled holes for screw fixings to concrete, masonry and block work. Use proprietary plugs in accordance with the manufacturer’s recommendations. When plugging through applied finishes ensure that plugs and fastenings have ample penetration into the structural backing. 4.3.18 Built in Joinery Where joinery is described as “to be built-in” for setting it in position, plumb, level, brace and temporarily prop it so that it cannot be displaced during subsequent buildings operations. Provide and fix to the joinery any holdfasts, anchors or other fixings required to permanently fix it in the completed works. If instructed by the Engineer, provide and fix protection pieces to edges and surfaces likely to be damaged during the construction process and remove them and make good on completion. Unless designed and intended to support loads, built-in joinery shall not be used as a temporary support for lintels or other parts of the structure. Sufficient clearance shall be provided around all units to ensure that deflections of the surroundings structure cannot impose load on the unit and any bedding, or pointing, of such clearances shall be with a resilient material. Where joinery works are to be built in before the surrounding building carcass is complete the Contractor shall ensure that the necessary fixings are incorporated in the carcass. The work shall be fixed in plumb and true in accordance with the drawings with all necessary wedges and shims as detailed or as may be directed. Overhead clearances and levels shall be maintained where applicable. Where timber work is required to be wrote, it shall be machine dressed, unless otherwise directed. All joints, mortises, housings etc. shall be perfectly formed and fitted, and all joints shall be painted over with preservative before fixing. 4.3.19 Protection Surfaces to be painted shall be primed as soon as possible after fixing, and hardwood surfaces, or surfaces for clear finishes, shall be given a sealing coat of a clear sealer compatible with the final finish as soon as possible after fixing.
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4.3.20 Preservatives Preservatives shall be applied by brushing, steeping, vacuum pressure or double vacuum processes as stated in the description or appropriate to the type of preservative. Brushing shall be two full coats brush applied: steeping or dipping shall be complete immersion for a period of not less than three minutes. Vacuum pressure and double vacuum treatment cycles shall be as specified in BS 5589 and a certificate of treatment shall be provided. Before applying preservative by any method, the timber shall be clean, free from surface moisture and dirt and at a moisture content not exceeding 22 percent. Treatment is normally to be carried out after all cutting, boring or shaping is complete. If cutting, boring or shaping after treatment is unavoidable a liberal coating of the same, or a compatible, preservative solution must be given to the cut surface. When pressure treatment with a water-borne preservative is required by the description the timber must be dried after treatment to the specified moisture content. 4.3.21 Adhesives and Fillers Surfaces to be coated with adhesive or fillers shall be clean, free from sawdust or dust, oil or other contamination, and shall be freshly cut. Except in the case of plywood, hardboard and similar surfaces which have to be lightly scored to assist adhesion they should not be sandpapered. All adhesives must be stored and mixed in clean containers and the maker’s instructions concerning mixing, pot-life, application and setting conditions strictly followed. Adequate pressure must be applied to all glued joints to ensure intimate contact of the meeting faces and pressure must be maintained until the adhesive has set. Organic glues and casein adhesives may be used in internal joinery where the joint is not load bearing and moisture contents are not likely to exceed 16%. In all other cases synthetic resin or PVA adhesive must be used. If mechanically secured joints are to be put together with filler it shall be a white lead paste or suitably formulated mastic to the Engineer’s approval. 4.3.22 Veneered Work Work which is described to be ‘veneered’ shall be covered on exposed surfaces with wood, or other, decorative veneers selected by the Engineer. Unless otherwise specified or agreed, all panels shall have a suitable compensating veneer on unexposed surfaces.
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4.3.23 Clear Finish Timber described as ‘to be for clear finish’ shall be selected for grain and colour to avoid excessive con-contrast between adjacent pieces and shall be fine-sandpapered. 4.3.24 Finishing for Polish, Paint or Stain All joinery which is to be polished, stained or painted shall be finished smooth and clean by rubbing down by hand with fine glass-paper. 4.3.25 Scribing All skirting, plates, and other joinery-work described as ‘scribed’ shall be accurately scribed to fit the contours of the surfaces against which they abut. 4.3.26 Protection from damage All joinery shall be protected from damage during the construction of the works and when handed over shall be to the Engineer’s entire satisfaction. Before handing over the Contractor shall ensure that all moving parts move easily. Make all necessary adjustments including those needed during the maintenance period. 4.3.27 Timber Handrails Timber handrails shall be turned from milled wood to finished profile as shown on drawings in unbroken lengths. Joints shall be lapped and scarfed to match grain and free ends shall be bull-nosed. Fixings shall be stainless steel proprietary fixings, secret fixed, at centres, not to exceed 1.20m in straight runs and 0.8m at changes of direction. 4.3.28 Finish All timber members shall be treated as specified in the ‘Painting’ section. 4.3.29 Making good all defects in work Should any shrinkage or warping occur or any other defects appear in the joinery work before the end of the defects liability period all defective work shall be taken down and renewed to the entire satisfaction of the Engineer and any work disturbed made good at the Contractor’s expense.
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Metal Doors
5.1 General 5.1.1 Scope of Work Supply and installation of proprietary steel doors. Relevant Standards Conform to the recommendations of the following British Standards where applicable: BS 1245
Specification for metal door frames (steel)
BS 5286 : 1978
Aluminium framed glass doors - sliding
BS 6496 : 1984
Specification for powder organic coating
CP 153
Cleaning, durability, sound insulation fire hazards
5.1.2 Literature, Shop Drawings and Samples Submit comprehensive technical literature giving details of all proposed metal doors for the prior approval of the Engineer. Submit illustrations and samples of various powder coating and colours for selection by the Engineer. Submit shop drawings of the proposed metal doors including installation and fixing details for the Engineer’s approval. After finalisation of all details, full sized samples, inclusive of all fixings, ironmongery and other components shall be fabricated for approval by the Engineer prior to full production for each door type. 5.1.3 Evidence of Performance Provide independently certified evidence that all doors comply with specified performance requirements. Provide evidence from the manufacturer of their suitability in terms of their resistance to the action of the elements i.e. wind, rain, temperature, and general structural integrity. Where doors are specified as fire rated, a certificate of compliance with R.O.P. approval must be submitted.
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5.1.4 Storage and handling All items described under this section shall be handled, delivered or stored in a manner that will avoid damage, rust or deformation. Items shall be stored offground and shall be entirely covered with weatherproof coverings in storage area. Items which become rusted or damaged because of non-compliance with those conditions will be subject to rejection, and such items shall be replaced without additional cost to the Employer. All visible anodized or powder coated surfaces shall be protected by suitable low tack tape or lacquer before delivery to site.
5.2 Materials 5.2.1 Steel Doors Proprietary steel doors to the sizes, detailing and configuration shown on the Drawings. Construction to be of two skins of 1.22mm (18 g) zinc steel sheet, lock seamed at vertical stiles and in filled with impregnated honeycomb board insulation material. Finish to be factory applied stove painted to later colour selection. Fire-rated doors to be constructed accordingly and have proven certified fireratings in compliance with door schedules. All weather stripping shall be easily replaceable. 5.2.2 Glazing As noted in the schedules and as specified under “Glazing” section herein. Glazing where specified in doors must comply with R.O.P. requirements and must not compromise the fire rating of the door.
5.3 Execution 5.3.1 Steel doors Install doors in accordance with the manufacturer’s recommendations. Provide adequate protection until handover. The units shall be transported, handled and stored in accordance with the manufacturer’s recommendations and the Contractor is responsible for ensuring that the installed units are not damaged. Before fixing any metal work which will be in direct contact with concrete should have 2 coats of bitumen solution or mastic impregnated tape applied to the surface of the components. Black bitumen coating solution shall be as for cold application to BS 3416 type. All visible anodized and power-coated surfaces to be protected using low tack tape or lacquer before delivery to site. Any item delivered to the site which show any defect or deformation will be rejected.
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5.3.2 Installation of Doors Ensure that adequate drainage holes if required are complete and neatly finished before installation. Install the doors in accordance with the approved shop drawings. Anchorages to be arranged to allow for adjustment with proper allowance for normal building movement. Fixing of frames for all units to the building shall be such to ensure solid, void free, waterproof joints. Seal any gaps between frames and openings with sealant in accordance with section “Sealants” herein. 5.3.3 Protection Adequately protect finished surfaces against damage from subsequent building operations such as plastering, etc. Carefully cover with masking tape or other approved means. 5.3.4 Completion Before project handover remove all protective tape and clean exposed surfaces or extraneous marks to the satisfaction of the Engineer. Ease and adjust as necessary all opening lights and leave in perfect working order
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Wooden Doors
6.1 General 6.1.1 Standards All materials and workmanship shall comply with the relevant British Standard or Code of Practice unless amended herein. Conform to the following British Standards where applicable: BS 459, Parts 3 and 4
Wooden doors
BS EN 942
Timber in joinery - General classification of timber quality
BS 1186 : Part 2
Specification for workmanship
BS 4787 : Part 1
Internal and external wooden door sets, door leaves and frames
BS 5588 : Part 3
Means of Escape for Offices
6.1.2 Local Authority Requirements Where fire resisting properties are required ensure that construction details and materials are to the approval of the R.O.P – Civil Defence Section. 6.1.3 Delivery and Storage Wooden doors are to be delivered to the site un-primed. Stack doors horizontally in piles and ensure adequate protection from direct sunlight, moisture, excessive heat, etc. 6.1.4 Submittals Submit detailed shop drawings of all wooden doors giving details of all joint details, built-in frames or ironmongery, glass fixing etc. After finalization of all details full sized samples inclusive of all fixings, stripping, glazing and other components shall be fabricated for approval by the Engineer prior to full production for each door/window/screen type.
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6.1.5 Evidence of Performance Provide independently certified evidence that all doors comply with the specified performed requirements, including R.O.P. certificate where applicable. Provide evidence from the manufacturer of suitability of the materials to action of the elements i.e. wind, rain, temperature and structural integrity.
6.2
Materials - Doors
6.2.1 Doors and Frames Generally All wooden doors and frames are to be proprietary items manufactured under mass-production factory conditions by a company specializing in this work. Door and frame types to be as detailed on the drawing and the door schedule. Notwithstanding other specification clauses elsewhere herein all timber for doors and frames shall be kiln dried with a moisture content of between 10% and 12% and must be treated and guaranteed against termite/fungus treatment. All other general specifications herein regarding timber are also to be applied in regard to doors and frames. 6.2.2 Doors Flush doors shall have solid wooden cores and hardwood lipping to all edges, and shall comply with the standards specified for half-hour fire resistant doors in accordance with BS 4787 and of the size and thickness as shown on the drawings. Doors shall be covered with 6mm minimum thickness of plywood both sides. Internal doors shall be constructed using MR adhesive and MR plywood except in wet areas where WBP plywood shall be used and WBP adhesive used for the assembly of the door. External doors shall be WBP ply and be assembled using WBP adhesives. Openings for glass shall have glazing fillets in accordance with BS 459 Part 2. Doors fixed in pairs shall have rebated meeting stiles worked solid on the lipping unless noted otherwise on the drawings. Separate fillets will not be permitted. A teak veneer finish is required to both sides of wooden doors. Where specified, the veneer shall be horizontal grain and veneer matching pattern. Where doors are installed in pairs, the veneer pattern must be pair and set matching. All doors shall be manufactured to allow for incorporation of the desired door accessories. 6.2.3 Wooden frames All wooden door frames are to be taken from the solid and rebated and shaped to the profiles indicated on the drawings. All edges to be pencil rounded.
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6.2.4 Steel frames Steel door frames to be proprietary items to the profile indicated on the drawings, pressed from 1.6 mm zinc coated steel sheet. All joints to be bolted butt joints. Finish to be factory applied self-etch stoved primer paint ready to receive site applied top coats. 6.2.5 Core material Semi-solid cores where specified shall be filled with particle or mineral board. 6.2.6 Lippings Edges of all doors to be capped with 10mm thick lipping all round. 6.2.7 Fire resistant linings Minimum 6mm approved mineral fibre board suitable for application in fire resisting door construction. Products containing asbestos are not acceptable. 6.2.8 Intumescent strips Single leaf fire doors shall be fitted with IF30/IF60 fire and smoke seals and intumescent plugs to suit the particular requirement as manufactured by Sealmaster Ltd, Cambridge CB2 4HG, England. Double leaf fire doors and fire doors to CO2 protected areas shall be fitted with N30/N601MN/IMP fire and smoke seals and intumescent plugs to suit the particular requirement. 6.2.9 Door Louvre Panels Door Louvers shall be extruded aluminium with finish to match the door. All blades, frames and trim members shall be 6063.T52 alloy, minimum1.27mm thick. All fastenings to be stainless steel or aluminium. A separate adjustable trim member shall be supplied to securely and neatly clamp louvre trim opening. Interior trim frame to be secured by counter sunk Jackson head screws. All frames and trim members to be mitred at corners and rigidly secured by corner brackets. Louvers shall have sight-proof blade as Model DL-138 manufactured by Construction Specialties, Inc. or equal and approved. 6.2.10 Door Weather Seals Provide and fix aluminium threshold and jamb seals to external doors as indicated on the schedules. Threshold seals shall be type B/BSD and jamb seals type JMX as manufactured by Sealmaster U.K. or equal and approved with powder coated finish to match window framing. The weather seals shall be easily replaceable.
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6.2.11 Adhesives Complying with BS 1204 : Part 1 and 2. Use external (type WPB) where applicable. 6.2.12 Ironmongery Ironmongery is covered by a prime cost sum, in BOQ and is to be selected at a later stage. The following should however be considered in manufacture of doors: •
Ironmongery will mainly be concealed type. The ironmongery shall confirm to the operation requirements noted on the schedules and shall maintain the dimensional stability of the composite door.
•
The supply and installation of doors shall include for incorporation of ironmongery.
6.2.13 Door Thresholds External - As according to the details, shown in the drawings.
6.3 Execution - Doors 6.3.1 Workmanship Workmanship generally to conform to BS 1186 : Part 2. 6.3.2 Door framing Stiles and top rail to have a minimum width of 80mm; bottom rail minimum 200 mm unless indicated otherwise on the drawings. Provide adequate lock and hinge rails/plates as required. 6.3.3 Jointing generally Top and bottom rails to be either morticed and tenoned or dowelled. Intermediate rails, glazing bars, etc., to be sub tenoned. All contact surfaces of dowels, tenons and wedges to be glued with adhesives. 6.3.4 Fire doors Fire rating of doors where applicable to be as indicated on the drawings or door schedules. Such doors are to comply with the requirements of BS 476 : Part 8. Construction to comply with the local Fire Prevention Officer’s requirements in regard to stability, integrity and insulation. Intumescent strips are required to all fire resisting doors and are to be fixed continuously along all edges of frame. 6.3.5 Wooden door frames Finished wooden door frames are to be screw/plug and pellet fixed to block work/concrete walls only after completion of relating wall and floor finishes.
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6.3.6 Steel door frames Build in metal door frames securing the frame to either block work or concrete by any method recommended by the frame manufacturer which meets the approval of the Engineer.
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Aluminium Doors & Windows
7.1 General 7.1.1 Scope of Work Supply and installation of proprietary aluminium doors and windows.
7.2 Relevant standards Conform to the recommendations of the following British Standards where applicable: BS 4873
Aluminium alloy windows
BS 1474
Wrought aluminium and aluminium alloys for general engineering purposes.
BS 3987
Anodic oxide coating on wrought aluminium for external architectural applications.
BS 5368
Method of testing windows Part 1 : 1976
Air permeability test
Part 2 : 1980
Water-tightness test under static pressure
Part 3 : 1978 BS 6375
BS 6496 : 1984
Wind resistance tests
Performance of windows Part 1 : 1989
Classification for weather tightness
Part 2 : 1987
Specification for operation and strength characteristics
Specification for powder organic coating
7.2.1 Literature, Shop Drawings and Samples Submit comprehensive technical literature giving details of all proposed doors and windows for the prior approval of the Engineer.
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Submit illustrations and samples of various colours for selection by the Engineer. Submit shop drawings of the proposed doors and windows including installation and fixing details for the Engineer’s approval. After finalisation of all details, full sized samples, inclusive of all fixings, ironmongery and other components shall be fabricated for approval by the Engineer prior to full production for each window/door type. 7.2.2 Evidence of Performance Provide independently certified evidence that all doors and windows comply with specified performance requirements. Provide evidence from the manufacturer of their suitability in terms of their resistance to the action of the elements i.e. wind, rain, temperature, and general structural integrity. 7.2.3 Storage and handling All items described under this section shall be handled, delivered or stored in a manner that will avoid damage, rust or deformation. Items shall be stored offground and shall be entirely covered with weatherproof coverings in storage area. Items which become rusted or damaged because of non-compliance with those conditions will be subject to rejection, and such items shall be replaced without additional cost to the Employer. All visible surfaces shall be protected by suitable low tack tape before delivery to site. 7.2.4 Guarantee Provide a 10 year guarantee for breakage, leakage etc. caused by manufacturing and installation defects (guarantee excludes elastic sealant for installation).
7.3 Materials and Performance 7.3.1 Aluminium Windows and Doors All aluminium windows and doors are to comply with the requirements of BS 4873 and BS 6375. All frames shall be of rigid and robust construction with welded or mechanical corners preventing torsion opening the corners when fitted in the building. All opening lights are to be weather-stripped and meet the requirements of testing as defined below: (Test procedures BS 6375, Part 1) Air permeability 600 Pa (special) Water tightness 200 Pa
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Wind resistance
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1600 Pa
Operation and strength performance to comply with BS 6375 : 1987, Part 2. All doors and windows are to be supplied from their manufacturer complete with all necessary glazing inserts, sealing strips, gaskets, weather strips, glazing beads and all ironmongery as specified. All exposed aluminium work shall have powder coated finish, colour to be selected by the Engineer unless otherwise specified. The application process shall conform to BS 6496. Submit details for process for approval prior to fabrication. All external aluminium windows and doors to be complete with weather-seals, thresholds, jamb seals and cills. 7.3.2 Ironmongery Ironmongery will be mainly be concealed type. The ironmongery shall conform to the operation requirements noted on the schedules and shall maintain the dimensional stability of the window/door assembly. The supply and installation of windows/door shall include for incorporation of ironmongery. Ironmongery is covered by a prime cost sum, refer B.O.Q and is to be selected at a later stage. The following should be considered in manufacture of windows: •
The openable windows will be provided with maintenance key operation only.
•
Ironmongery will mainly be of concealed type. The ironmongery shall conform to the operation requirements noted on the schedules and shall maintain the dimensional stability of the window assembly.
•
The supply and installation of windows shall include for incorporation of ironmongery.
7.3.3 Glazing As noted in the schedules and as specified under “Glazing” section. 7.3.4 Weather Stripping Chloroprene rubber, solid complying with BS 4255, Part 1 or cured ethylene propylene diene monomer (EPDM). 7.3.5 Fixings All fixings shall be stainless steel grade A4/316 7.3.6 Sills Externally & Internally - Pre-cast concrete sills complying to Section- 4, “Concrete”.
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7.4 Execution 7.4.1 Fabrication and delivery of aluminium elements All jointing shall be tightly fitted and executed in an inconspicuous manner with hairline joints. All panels shall have overlapped joints to prevent rocking and to provide a positive weather seal. All weather stripping shall be easily replaceable and securely fixed to avoid gaps at corners and joints. Fabrication of all aluminium windows shall be carried out at the manufacturer’s workshop/factory and be delivered to site only when complete and ready for installation. The units shall be transported, handled and stored in accordance with the manufacturer’s recommendations and the Contractor is responsible for ensuring that the installed units are not damaged. Before fixing any metal work which will be in direct contact with concrete should have 2 coats of bitumen solution or mastic impregnated tape applied to the surface of the components. Black bitumen coating solution shall be as for cold application to BS 3416 type. Any item delivered to the site which shows any defect or deformation will be rejected. 7.4.2 Installation of aluminium windows and doors Paint the backs of all aluminium frames and any other aluminium surface in contact with different material with two coats of black bituminous paint to BS 3416 (or other approved protective coating) before installation to prevent electrolytic action. Ensure that adequate drainage holes if required are complete and neatly finished before installation. Install the windows in accordance with the approved shop drawings. Anchorages to be arranged, to allow for adjustment with proper allowance for normal building movement. Timber sub frames shall be hardwood complying with Section 16 of this Specification plugged into the opening prior to fixing the window casement. Fixing of frames for all units to the building shall be such to ensure solid, void free, waterproof joints. Seal any gaps between frames and openings with sealant in accordance with section 26. 7.4.3 Protection Adequately protect finished surfaces against damage from subsequent building operations such as plastering, etc. Carefully cover with masking tape or other approved means.
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7.4.4 Completion Before project handover remove all protective tape and clean exposed surfaces or extraneous marks to the satisfaction of the Engineer. Ease and adjust as necessary all opening lights and leave in perfect working order.
7.5 Automatic doors Automatic doors shall be installed as shown on the drawings. 7.5.1 Sliding Glass Doors Automatic, sliding glass doors shall be as DORMA ST-G with all-glass section system, or equal approved. Doors shall be 2-leaf, with or without side panels according to location. Glazing shall be laminated safety glass VSG. Door operator shall be DORMA ES90/ES-100; modular design; complete with microprocessor unit; closing force monitor; main and ancillary closing edges; direction reversal on encountering obstruction. In the event of power failure door should revert to closed position. In the event of fire alarm activation, the door should revert to the open position. Door should incorporate self-teach operator intelligence adjustable opening and closing force, opening and closing creep speed, and hold-open timing. Control programmes: Off-Auto-permanent open-Partial open-Exit only. The following options are to be included: •
Electromechanical locking
•
Internal manual lock
•
Emergency power supply module
•
Radar (microwave) detector
Colour: White RAL 9010.
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Ironmongery
8.1 General 8.1.1 Scope of Work Supply and installation of all ironmongery as required for internal and external doors, windows and the like. 8.1.2 Relevant British Standards All items of ironmongery shall conform to the following standards where applicable: BS 1227:1967
Specifications for hinges
BS 3261:1980
Specification for thief-resistant locks
BS 4951:1978
Specification for builders’ hardware : lock and latch furniture.
BS 5725:1981
Emergency exit devices
BS 5872:1980
Specification for locks and latches for doors in buildings
BS 6459:1984
Door closers
8.1.3 General Standard Ironmongery shall be of type complying to British Standard or similar standard specification shall be of the best quality obtainable from an approved manufacturer, all to the approval of the Engineer. 8.1.4 Schedules Provide full ironmongery schedules prepared by the approved ironmongery manufacturer(s) for the Engineer’s approval. In compliance with the schedules provided in the drawings. The requirements of hold-open doors, etc.as per STET – Security Consultants requirements to be taken into consideration while preparing the final schedule.
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8.1.5 Keys All items of ironmongery with a locking device are to be provided with 4 No. keys. These are to be handed over to the Engineer on completion of the contract complete with the key tags. 8.1.6 Master key system Contractor shall allow for the supply of a single step master key system. On approval of the material proposed, master keys shall be directly supplied by the manufacturer to the Client. 8.1.7 Literature and samples Provide manufacturer’s literature and, if requested by the Engineer, samples of ironmongery items proposed.
8.2
Materials
8.2.1 Ironmongery Items All items of ironmongery are to be from one manufacturer. All ironmongery used externally shall be of an approved non-ferrous type and fixed with matching non-ferrous screws. Ironmongery to be in brushed Stainless Steel matt finish. Handle levers to be in solid stainless steel.
8.3
Execution
8.3.1 Installation All items of ironmongery to be installed/fixed in accordance with the manufacturer’s instructions and generally in compliance with best general practice. All cut outs, sinking, key access and spindle access holes shall be neat, tidy and workmanlike. Fixing screws shall be non-ferrous driven properly and shall be of the correct size to match the relevant fitting. Hinges for doors shall be let into timber frames for the thickness of one leaf of the hinge and let into the door or window shutter for the thickness of one leaf of the hinge. The leaf of the hinge when fixed shall be flush with the timber surface. Ironmongery and furniture shall function smoothly and positively, without undue pressure being required to operate the mechanism. Ironmongery and furniture shall be left free of paint, stains, marks and damage. Hinges shall be firmly screwed and free of packing. All hinge screws shall be countersunk and flush fitting.
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8.3.2 Completion Remove all ironmongery after first fix to allow completion of final decorations. Re-fix, lubricate, clean and leave in perfect working order on completion, all to the satisfaction of the Engineer.
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Glazing
9.1 General 9.1.1 Relevant British Standards and Codes All items and work relating to glazing shall conform to the following British Standards where applicable. BS 952 : 1978/1980
Glass for glazing
BS 5713:1979
Specification for hermetically sealed flat double glazing units
BS 6262: 1982
Code of practice for glazing of buildings
BS 6375 :1983/1987
Performance of Windows
9.1.2 Technical Literature Submit detailed technical literature concerning the properties of the glass types being proposed, as well as samples with the tender submission, for the review and approval of the Engineer. 9.1.3 Guarantee Provide a 10 year guarantee against leakage, failure of sealing and similar manufacturing defects.
9.2
Materials
9.2.1 External Double Glazing The standard double glazed assembly specified in the schedules for external doors and windows shall be double glazing units with 6mm thick float glass external panes, 6mm thick low emissive (Low E) inner glass panes, having the following combined properties:a. Daylight transmittance 0.29 (minimum) b. Daylight reflectance
0.13 (maximum)
c. Solar radiation transmittance
0.25 (maximum)
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d. Solar radiation reflectance
0.11 (minimum)
e. Solar radiation absorption
0.64 (minimum)
f. Solar radiation total transmittance
0.36 (maximum)
g. U-Value
3.15 w/m2k (maximum)
h. Shading coefficient total
0.41 (maximum)
i.
To approved sample
Colour
63
In addition the inner panel should be finished with an approved solar reflective film to approved sample. The assembly generally shall comprise 2 x 6mm thick panes with 10mm airspace. The units shall incorporate a two part seal with continuous rolled aluminium spacer in natural colour with a desiccant to keep the air in the unit dry and free from organic vapours. The perimeter of the unit shall be hermetically sealed with a two part system made up of butyl and a silicone seal to BS 5713. Glass shall be annealed or toughened as recommended for specific applications by BS 6262. Double glazed panels in external doors shall be 6mm toughened safety glass. 9.2.2 External Single Glazing Single glazed panels in external entrance doors shall be 12mm laminated glass consisting of two 6mm layers of body tint anti-sun glass to match the window external panes. 9.2.3 Internal Glazing For internal fanlights to doors glass should be 6mm polished plate unless otherwise noted on the drawings. Decorative stained glass panels to internal doors shall be constructed with lead cams in coloured body glass or Cathedral glass to design and colour approved by the Client. Panels shall be of the size and shape as shown on the detail drawings. Clear glass used in doors shall be toughened glass or laminated glass in accordance with the relevant BS and clearly identified as such on each panel. 9.2.4 Distance pieces, setting and location blocks Small pieces of rot-proof non-absorbent material not hard enough to fracture the glass as follows: Distance pieces and location blocks - resilient material such as plasticized PVC to BS 2571 Setting blocks - no compressible material such as sealed hardwood or rigid nylon.
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9.2.5 Putty and Glazing Compound Linseed oil putty shall conform to BS 544 : 1969. Proprietary metal casement putty compound may be used in appropriate locations subject to the approval of the Engineer. Flexible glazing compound, glazing sealant, glazing tape, springs, spacers, etc. May be used subject to the Engineer’s approval. They shall be proprietary products suitable for the application proposed. Any glazing compounds which are not to be painted should be submitted for approval of their colour prior to ordering. Wash leather for internal glazing shall be supplied and fitted as recommended by the manufacturer. Back bedding and pointing should be as per manufacturers specification. 9.2.6 Sprigs Headless rustproof or non-ferrous nails.
9.3
Execution
9.3.1 Measuring glass Before measuring check that surrounds, rebates and other surfaces are dimensionally true, without distortion and fit for glazing. Edge cover for single glazing should be in accordance with the following:Glass area in m2
Edge cover
up to 0.5
5mm
0.5 to 1.5
9mm
1.5 to 4
12mm
over 4
As recommended by sealant manufacturer
Edge cover and clearance for solar glazing to be as recommended by the manufacturer. Ensure that no voids or spaces are left in backing or bedding compounds and when stripping surplus off this should be flush with top and side edges and angles at the bottom to avoid water collection. 9.3.2 Cutting glass Cut all glass and perform all edge and surface treatment at glass works. Cut to produce clean square edges. Any work to toughened glass must be undertaken by glass manufacturer prior to toughening process. Do not nip the edge of any multiple glazed units.
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9.3.3 Preparing for glazing Generally: Clean and dry rebates before priming or sealing and glazing. Check that any unspecified primers/sealers/glazing compounds are compatible. 9.3.4 Preparing wood surrounds For linseed oil putty : one coat of primer unless a pre-applied primer is in good condition. For metal casement putty and other glazing compounds : two coats of sealer. 9.3.5 Preparing metal surrounds Coat the rebates if so required by the manufacturer of the surround or the glazing compound. 9.3.6 Beads Treat bedding surfaces of wood or metal beads as specified above for wood or metal surrounds, as appropriate. 9.3.7 Preparing for adhesive sealants a) Remove any protective coverings (e.g. tapes, wax coatings etc.). b) Clean surfaces with a degreasing solvent and wash off. c) Repeat (b) immediately before glazing but allowing time to dry. 9.3.8 Checking solar and tinted glass These glasses are liable to fracture after glazing if edges are damaged. Take precautions as follows: a) Check the edge condition of any anti-sun, tinted or opaque glass exposed to sunlight when fixed. b) Reject any such glass if edges are shelled, vented or otherwise damaged. c) Ensure that pane sizes allow for full specified edge clearance; edge nipping is not permitted. 9.3.9 Location of glass in surrounds Use 25mm long spacers to locate and prevent movement of glass or glazing units over 0.2m2 in area as stated below. Place setting blocks under bottom edge, sized and located as follows: a) Width :Thickness of glass plus back clearance in order to locate the block against the back of the rebate. b) Thickness : to suit edge clearance specified in clause 13.3.1 c) Location : at the surround’s point of least deflection. d) Location blocks
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Place at sides of panes or units in opening windows or doors, sized and located as follows: a) Width :
as stated at 13.3.9 (a)
b) Thickness : to suit edge clearance specified in clause 13.3.1. c) Location: at points which will restrict the likely sideways movement (dropping) when the frame is opened. 9.3.10 Distance pieces Place in pairs on both sides of bead fixed panes or units (except where preformed tapes are specified) sized and located as follows: a) Thickness : equal to the specified thickness of the glazing compound. b) Width : depth of bedding less min. 3mm to ensure adequate cover. c) Location : to coincide with bead fixing points but at maximum 300mm centres and not coinciding with setting and location blocks. Where beads are continuously fixed, locate about 50mm from each corner and then at 30mm centres. 9.3.11 Wired or patterned glass Locate panes with wires of a directional pattern parallel to the surround and align with similar adjacent panes. Fix textured glass with smooth side externally. 9.3.12 Glazing into rebates with beads a) Generally: Bed the beads against the approved glazing compounds and tapes, and securely fix to prevent movement. When the bead is internal, it need not be bedded against the surround. Fix pins or screws at 75mm from each corner and elsewhere not more than 200mm apart. If beads are prefixed, remove and refix; provide additional matching fixings if necessary to attain secure fixing. b) Internal glazing with tape : Fix to glass over full embedded surface and trim surplus back to sight line. c) Single glazing with putty : Fix the glass as follows: i.
Apply sufficient putty to rebate and insert setting and location blocks.
ii. Press glass into putty to form solid backing about 1.5mm thick iii. Apply putty to glazed face to form adequate bedding for beads. iv. Fix the beads v. Strip surplus putty on both sides and finish to a smooth chamfer. vi. Seal the putty to the glass with a light brushing. d) Glazing with hand grade non-setting compound : Fix glass or insulating units as follows: i.
Apply sufficient compound to rebate and insert setting and location
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blocks. ii. Press glass into compound to form a solid backing about 3mm thick. Insert distance pieces. iii. Apply compound to glazed face to form adequate bedding for the beads. iv. Insert distance pieces in locations which oppose those already fixed. v. Fix beads and, if uncapped, tool compound to a smooth chamfer on both sides. e) Glazing with two-part rubberizing compounds: Clean and prime all surfaces. Thoroughly mix components and use during ‘open’ time. Clean off compound at time of glazing, allow 7 to 14 days to cure and finally clean. 9.3.13 Protection of putty Protect with paint: Paint as soon as surface has hardened sufficiently, ensuring paint seals putty to glass. Leave opening lights closed until putty has hardened. 9.3.14 Protection Protect all glazing during construction and as portions reach completion, against any form of damage or deterioration. Such protection shall include coverings, guard rails or other appropriate methods. Particular attention is drawn to the need for the protection of solar reflective glass from damage from mortar or similar splashes. Provide protection as necessary. 9.3.15 “Glazing completed” indicators Traditional white marks or adhesive stickers are permitted if they do not damage the glass surface. Whiting is suitable but do not use alkaline material (e.g. lime). Adhesive labels must be easily removable without scrapping. No indicators of any sort are permitted on solar control glass. 9.3.16 Keep glass clean Keep glass reasonably clean at all times. Clean and polish both sides of all glasses and mirrors on completion. 9.3.17 Protect glass Provide protection against mechanical damage. Protect against damaging splashes and weld splatter etc. Remove any alkaline splashes before they harden. 9.3.18 Test and replace glass Test all glazing to ensure that it is weather tight. Replace defective or damaged glazing elements to the satisfaction of the Engineer.
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9.4 Structural Glazing Structural glazing, where specified or shown on the drawings shall be designed and supplied by an approved specialist. 9.4.1 Core Application Rules for Building Façade Glass panels are to be as shown on elevation. The glass joints to align with stone / metal cladding joints 9.4.2 Technical Details 9.4.2.1 Aluminium Frame The aluminium support frame for the glazing shall white powder coated. Aluminium mullions as per manufacturers specifications. 9.4.2.2 Butt Joints To be 19mm total width 9.4.2.3 Caulking Grey sealant as Dow Corning 795: Grey or equal approved 9.4.2.4 Glass Specification Glazing units shall be insulated, laminated low iron glass (e.g. Starphire) comprised of 6mm glass with 12mm air space and 6mm low iron glass with internal side. Contractor shall provide a sample panel of the glass for approval of the Engineer.
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Ceramic Tiling
10.1 General The scope of work includes supply and installation of ceramic tiles for walls in accordance with the finishes schedule mainly to the following areas: Bathroom and toilets Kitchen and pantry areas All other areas as shown in the finishing schedules The tile material specification given in the following is intended for the purpose of quoting for installation only. The actual tile material will be specified by the interior designer in due time. 10.1.1 Relevant standards Conform to the following British Standards and codes of practice where applicable: BS 5385
Wall and floor tiling
BS 5980
Specification for adhesive for use with ceramic tiles and mosaics.
BS 8000, Part 2
Code of Practice for wall and floor tiling
BS 6431:Part 9:1984
Ceramic floor and wall tiles.
10.1.2 Samples and literature Samples and/or literature of proposed adhesive, sealants and grouts to be submitted to the Engineer for approval. 10.1.3 Shop drawings Provide detailed shop drawings of the tiling installation for the approval of the Interior Designer. Shop drawings are to show the following: i.
floor plans showing tile layouts, floor gulleys and any other relevant floor fixtures.
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Wall elevations showing tile layouts, mirrors, sanitary fixtures and any other, relevant wall fixtures.
Tile designs will be issued by the Interior Designer prior to preparation of shop drawings.
10.2 Materials 10.2.1 Tiles Tiles shall comply with the following minimum requirements in all respects: 10.2.1.1 General Areas Fully vitrified tiles conforming to R10, non-slip, resistant to oil, grease, and lyes. 10.2.1.2 Fully vitrified ceramic floor tiles Pressure strength
min 150 N/m sqm.
Bending strength
min 20N/m sqm.
Water absorption
max. 3%
Abrasion (=wear group 4)
max 12 cc/50 c sqm.
Note: In order to reach the necessary breaking and impact strengths, a minimum thickness of 15mm is required. All tiles to be submitted for Client approval. 10.2.2 Adhesives 10.2.2.1 Adhesives for floor tiling works Thin set latex mortar composition adhesive shall be used in accordance with the following characteristics: Shear bond
3.5 MPa (500 psi)
Shear bond water immersion
2.3 Mpa (340 psi)
Water absorption
4% max
Compressive strength
34.5 Mpa (500 psi)
TLA service rating
extra heavy
Tensile bond (BS 5890)
1575 N (355 lbs)
Shear adhesion (14 days)
22.8 kN95126 lbs)
Coefficient linear thermal expansion
65 x 10-7/(° F) 117 x 10-7/(° F)
All materials to be mixed and applied strictly in accordance with the manufacturer’s written instructions.
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10.2.2.2 Grout Compounds Grout system shall be epoxy based stainless grout. Grout shall comply with the following characteristics: Stainless, pigment free colourfast epoxy grout suitable for floor and wall installations of ceramic tile, brick and stone. Tensile strength
17.7 MPa (2577 psi)
Compressive strength
101 Mpa (14700 psi)
Thermal shock resistance
7.6 MPa (1100 psi)
Shrinkage
0.07%
Sag resistance
pass
Water cleanability
> 80 minutes
The completed system should carry a full warranty from the supplier. 10.2.2.3 Adhesives for bathroom areas Adhesive shall be two part latext modified as per manufacturers specification. 10.2.2.4 Grout compounds for bathroom areas Grout system shall be epoxy based stainless grout as per manufacturer's specification. The grout shall comply with the following characteristics: Stainless, pigment free, colour fast epoxy grout suitable for floor and wall installations. Tensile strength
11.7 MPa (1700 psi)
Compressive strength
51.7 Mpa (7500 psi)
Thermal shock resistance
7.6 MPa (1100 psi)
Shrinkage
0.19%
Sag resistance
pass
Water cleanability
> 80 minutes
10.2.3 Joint sealant, back-up strip, performed joint and grout As recommended by BS 5385. 10.2.4 Cement Ordinary Portland cement complying with BS 12 or Omani Standard No. OS7. 10.2.5 Sand Clean sharp sand complying with BS 882 (grading Zone 2 or 3). 10.2.6 Water Clean potable water shall comply with specification for Concrete Work.
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10.2.7 Mortar for floor tiles Thin-set mortar as specified here in. 10.2.8 Separating membrane Polythene sheet, 250 microns thick. 10.2.9 Grout Proprietary grout as recommended by tile manufacturer. Colour to match the tile and to the approval of the Engineer. The grout shall be water resistant.
10.3 Execution 10.3.1 Preparation Ensure that surfaces which are to receive tiling are free from lose or friable material, are perfectly clean and dry and will provide an adequate key for bedding. All surfaces to receive tiling to be left for at least 14 days after erection/ casting before tiling work is commenced. 10.3.2 Setting out Carefully set out tiling joints prior to starting to minimise tile cutting; avoid unduly narrow cut-off; and ensure alignment of vertical and horizontal joints. All wall tiling shall be laid with continuous joints running in both directions unless otherwise instructed by the Engineer. 10.3.3 Tolerances The maximum permitted tolerance for finished tiling will be 3mm when measured under a 3m straight edge unless specified otherwise. 10.3.4 Fixing of wall tiles 10.3.4.1 Fixing Pattern Tiling work to the walls shall be laid in orthogonal or diagonal pattern or as indicated in the drawings. The width of the borders shall be adjusted individually to suit the laying of the tiles. (Pattern to Architect’s drawing). The joints of the border tiles shall correspond to the joints of the adjacent border tiles. Where pattern are indicated to be diagonally laid, the setting out of the diagonal grid shall start from the central axes of a wall or as indicated on the respective drawings. All tiles must be laid in a full square pieces or a half-diagonal piece at 45 degree angle, with no exception. However, all borders width must not be more than half the diagonal measurement of a tile. Where patterns are indicated to be laid in orthogonal pattern to the axes, it must be laid parallel to the axes, the setting out shall start from the central axes of a
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wall or as indicated on the respective drawings. The joints of all tiles must correspond to the joints of the adjacent tiles. 10.3.5 Fixing of wall tiles 10.3.5.1 Thick bed adhesive method Generally wall tiles are to be fixed using the thick bed method as detailed by BS 5385: Part 1. Apply adhesive as a floated coat to a thickness of approximately 6mm or as recommended by adhesive manufacturer. Press tiles, which must be perfectly dry, firmly into position within stated working time of adhesive. Tiles may be buttered prior to fixing if so recommended by adhesive manufacturer. Use adhesive in strict accordance with manufacturer’s instructions. Note: Alternative wall tile fixing methods (thin bed systems or sand/ cement mortar system) may be used only if so approved by the Engineer. 10.3.5.2 Cement mortar method Setting out on site shall be to Engineer’s approval in accordance with approved drawings. Wall tiles shall conform to BS 6431 including all angle fillets, beads, etc. Tiles shall be obtained from a maker approved by the Engineer. Corner tiles shall have finished edges. Thin bed tile adhesives shall conform to BS 5980. Grout shall be to the approval of the Engineer. Jointing mastic shall be a 2-pack polysulphide mastic conforming to BS 4254. Wall tiling shall be carried out in compliance with BS 5385 for internal wall tiling in normal conditions. Tiling shall be applied to rendered block or concrete walls which have been allowed to thoroughly cure and dry initially for at least two weeks. Unless otherwise scheduled, glazed tiles shall be applied to a rendered surface. Preparation for wall tiling shall be generally as for internal wall finishes for preparing the background. Tiling requires true vertical and horizontal alignment of the tiling base. A render coat should be applied as a levelling course. Permitted deviation is 3mm over a 2m long straight edge. After preparation the wall surface apply a scratch coat of 1:3, cement: sand (04mm) omitting any lime additives. This coat to be 3-4 mm thick. Following the scratch coat apply a render coat of 1:3 or 1:4 cement: sand mix (sand 0.2mm) or a proprietary adhesive in accordance with BS 5980 and approved by the Engineer.
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Before fixing, tiles should be soaked in water and then allowed to drain for a minimum of 15 minutes until surface water is removed. If a cement mortar method is used, fixing should commence within two hours of laying the scratch coat. Care should be taken not to spread mortar or adhesive over too large a wall area in advance and it is important to check the bonding as the work proceeds by regularly detaching a tile to ensure that at least 65% of the tile back is covered by mortar or adhesive. Wall tiles should be laid after floor tiles and butt against them neatly. In areas where the floor tiles has a coved skirting, the skirting may be laid first. Movement joints shall carry through backgrounds to backing structure. Insert backing strip and seal joints with sealing compound to finish flush with surface of tiles. Corner tiles shall accurately fixed to blend with the surrounding tile work. Joints shall be sharp and well defined. Joints between tiles shall be grouted, not less than 12 hours nor more than 24 hours after the tiles have set, with non-staining white cement applied with a brush to fill thoroughly all joints. Tiles shall be cleaned, taking care to avoid damaging their surface, using one part muratic acid to 10 parts of water. Excess grout shall be removed before it has time to set. 10.3.6 Fixing of floor tiles 10.3.6.1 Fixing Pattern Tiling work to the floors shall be laid in orthogonal or diagonal pattern or as indicated on the drawings. The width of the borders shall be adjusted individually to suit the laying of the tiles. The joints of the border tiles shall correspond to the joints of the adjacent border tiles of the wall. Where pattern are indicated to be diagonally laid, the setting out of the diagonal grid shall start from the central axes of a room or as indicated on the respective drawings. All tiles must be laid in a full square pieces or a half-diagonal piece at 45 degree angle, with no exception. However, all borders width must not be more than half the diagonal measurement of a tile. Where patterns are indicated to be laid in orthogonal pattern to the axes, it must be laid parallel to the axes, setting out shall start from the central axes of the room or as indicated on the respective drawings. The joints of all tiles installed on the floor shall be in line with the installation of the tiles on the walls and threshold tiles, or as indicated on the drawings. Where the tile floors meet the plaster walls a 150mm width matching tile skirting, unless otherwise specified, shall be installed to the plaster walls. The joints of the wall/skirting tiles shall correspond to the joints of the border tiles.
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10.3.6.2 Fixing Methods Any of the three following methods (thin bed system or sand/cement mortar systems) may be used if so approved by the Engineer. a)
Thin bed method
Prepare base according to adhesive manufacturer’s instructions and apply adhesive direct to dry base in a layer not exceeding (5mm). Lay dry tiles onto bedding and tamp down (or butter backs of tiles with bedding and tamp down (or butter backs of tiles with adhesive, apply tiles direct to prepared base and tamp down). Leave joints to 3 mm (minimum) between tiles. In all cases ensure that tiles are solidly bedded without the formation of air pockets. 10.3.7 Quality of tiling All joints in tiles to be flush. Cutting and fitting of tiles to be done neatly and to connect closely with abutting work. All cuts to be rubbed smooth with a fine stone. Provide and install round-edge tiles to the top course of all tiled areas and to any exposed vertical edges. Tiles are to be fitted sufficiently close to plumbing fixtures, outlets, pipes, recessed accessories or other adjacent elements to ensure coverage of the joints by related plates or covers. Floor tiles to be laid to falls where required. Round edge tiles to be provided where such edges would be exposed to view. 10.3.8 Grouting Joints between the tiles shall be grouted not less than 12 hours and not more than 24 hours after the tile is set. Before the grout has set the joints are to be tooled and compacted and the excess grout to be washed and sponged from all sources, care being taken to avoid damage to the tiles, in accordance with the grout suppliers instructions. 10.3.9 Movement joints Provide movement joints to the full depth of the finish at all wall/floor and wall/ceiling junctions and elsewhere as specified on the Drawings or as instructed by the Engineer. Movement joints to be to the full depth of the finish and all in accordance with the recommendations of BS CP 202. 10.3.10 Tiled access panels Provide tiled access panels in tiled areas where access to concealed valves, traps and other similar items as required. Access panel shall be proprietary items such as “Frost” touch latch access doors as specified by F.C. Frost Ltd, U.K. Future Maintenance.
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10.3.11 Completion Thoroughly clean completed tile surface using one part muratic acid to ten parts of water if necessary. Leave tiling free of all imperfections to the satisfaction of the Engineer. 10.3.12 Future Maintenance As part of the contract, the Contractor shall store in a suitable place as advised by the Engineer/Client an additional 10% of the quantity of tiles used, for future use.
10.4 Special Requirements 10.4.1 Generally The following specification notes refer specifically to the Entrance lobbies and associated areas. It is the responsibility of the Contractor to ensure that the materials supplied are fit for purpose and to the approval of the Engineer. All floors shall be true and level unless specified otherwise. Transitions between different floor finishes should be flush and level. Supply and fix stainless steel finishing strips between all floor element finishes. The strip shall be Ti-Lock or equal approved and 6mm thick to approved sample. Grouts should match the colour of the selected floor tile and be in accordance with the detailed specification. Tiles in showroom area shall be laid in running bond. Rectangular tiles shall be laid with the longest edge of the tile parallel to the main entrance.
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Hard Floor Tiling
11.1 General 11.1.1 Scope of Work The scope includes supply and installation of hard floor tiles to the following main areas: The Contractor should refer to the finishes schedule for details of specific tiling areas. Ceramic tile flooring is specified under Section 14 ‘Ceramic Tiling’. The tile specification given in the following is intended for the purpose of quoting for installation only. The actual material will be specified by the Engineer in due course. 11.1.2 Relevant British Standards Conform to the recommendations of the following British Standards where applicable: BS 8000, Part II
Code of Practice for Wall and Floor Tiling
BS 4131
Terrazzo tiles
11.1.3 Literature and samples Provide comprehensive technical literature on all proposed floor tiling products together with illustrations of all colours/patterns/textures available. Selection of all material shall be to the approval of the Engineer. 11.1.4 Shop drawings Provide detailed shop drawings showing patterned floor tiling where called for on the drawings, for the approval of Engineer.
11.2 Materials 11.2.1 Terrazzo tiles The pre-cast terrazzo tiles and skirting shall be made from cement and coloured stone chipping as approved by the Engineer and manufactured in the Sultanate of Oman to comply with Omani Standard OS 3 and BS 4131:1973. The tiles
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shall be polished hard, durable and non-absorbent, of exact shape and even thickness and shall have sharp true edges and be the best of their respective types. Floor tiles: 300 x 300 x 20mm pre-cast terrazzo floor tile with fine grit finish. Stair treads: 600 x 275 x 30mm round edged tiles with two 5 x 5mm non-slip grooves shall be used for stair treads. Colour, size of chips etc. to be specified by the Engineer at later date. 11.2.2 Marble Tiles or granite 20mm thick natural imported marble or granite tiles as noted in the finishes schedules. Standard size to be 300 x 300mm or 300 x 600mm unless otherwise indicated on the drawings. Where used as a finish for stair treads the marble is to be 30mm thick to the profile shown on the drawings, and with a grit blasted flamed finish non-slip strip 40mm wide 20mm behind the nosing. 11.2.3 Skirting Terrazzo : 300 x 150mm high, 20mm thick with chamfered top edge. Skirting in conjunction with marble or granite finishes shall be 300x150mm high and finished in the same material as the floor. Top edges of all skirting shall be chamfered or moulded to approved sample. 11.2.4 Non-slip Tiles and Skirting Shower, bathroom and kitchen areas shall have an approved fully vitrified ceramic non-slip tile to approved colour and texture. 11.2.5 Cement Ordinary Portland Cement to BS 12:1978, or Omani Standard No. OS7. 11.2.6 Sand Clean sharp sand complying with BS 882:1983 (grading Zone 2 or 3) 11.2.7 Water Clean potable water to comply with concrete specification. 11.2.8 Separating membrane Polythene sheet, 250 mµ thick. 11.2.9 Adhesives and Grouts Adhesives and grouts should be fit for purpose in each area of use. The following performance characteristics should be met: • •
High compressive strength adhesive to take the weight of vehicles. High shear bond strength.
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Adhesive must be flexible to accommodate any vibration movement and impact. Grout to have a high compressive strength as well as being flexible. Grout to have high abrasion resistance. Grout to be stain resistant.
11.2.10 Adhesive System Adhesive shall comprise of a “thin set” type bonding medium comprising latex adhesive with an inert filler powder; as per manufacturers specification.
11.3 Execution 11.3.1 Preparation Ensure that all sub-bases for tiling (generally screeds) are thoroughly clean, dry and laid to the required levels and falls where applicable, before tiling work is commenced. All surfaces which are to receive tiling to be left for at least 14 days after erection/ casting before tiling work is commenced. 11.3.2 Setting out Lay out flooring material loose before cutting to approved layout/ pattern. Lay out material to minimise cutting and avoid unduly narrow or small cut-offs. Unless otherwise indicated on the drawings lay tiles with continuous joints running in both directions. 11.3.3 Laying of hard floor tiles Refer to Section 15 - fixing of floor tiles. Refer to finishes schedules for location and type. For terrazzo any of the above three approved methods of fixing may be employed. 11.3.4 Quality of tiling installation The maximum permitted deviation from level will be 3mm under a 3m straight edge in any direction taking into account drainage falls where applicable. Where cut tiles are necessary they shall be carefully cut with a suitable tool and rough edges rubbed smooth. Cut tiles which do not fit correctly shall be replaced with properly cut tiles. Ensure solid bedding of all tiles. Hollow sounding tiles to be replaced. 11.3.5 Grouting Leave tiles for at least 12 hours before grouting joints. Work grout well into joints until flush with face of tiles. Clean off surplus grout and thoroughly clean surface to leave neat crisp edged joints.
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Grouting procedure to be undertaken strictly in accordance with manufacturer’s recommendations. 11.3.6 Movement joints/separating strips Provide movement joints to the full depth of tile and bedding at all wall/floor junctions and elsewhere if specified or so requested by the Engineer. At wall junctions leave this joint empty of material ready for concealment by the skirting. Elsewhere joints to be sealed with backing material and sealant. Install separating strips where hard flooring tiles abut other floor finishes or elsewhere as shown on the drawings. Ensure separating strips are perfectly flush with the tile surface. 11.3.7 Terrazzo polishing All terrazzo surfaces are to be polished on completion. Large areas shall be wet polished by means of approved machines using a No.140 carborundum wheel. Any surfaces too small for convenient machine polishing may be polished by hand, using a No. 140 carborundum stone and water. Care must be taken during any polishing operation not to damage any angles or arrases. 11.3.8 Skirting Skirting shall be laid in such a manner that their vertical joints coincide with the horizontal joints in the floor tiles. The abutments against door frames shall be neatly formed. 11.3.9 Exposed stair treads Lay the outer (exposed) treads on a thin - bed of two part epoxy adhesive, all as detailed on the drawings. 11.3.10 Completion Leave floor finish clean and adequately protect the installation until handover. 11.3.11 Future Maintenance As part of the contract, the Contractor shall store in a suitable place as advised by the Engineer/Client an additional 10% of the quantity of tiles used, for future use.
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Concrete/Screed Hardener
12.1 General 12.1.1 Scope of Work Supply and installation of premixed dry shake surface floor hardener to concrete floors, screed and skirtings in the following main areas, refer finishes schedule for details. Hardened concrete floor areas •
Basement car park and plant areas generally
Conform to the recommendations of relevant British Standards and Codes of Practice where applicable. 12.1.2 Submittals Submit full details of the proposed products for the approval of the Engineer. Prepare a 1m x 1m sample of the proposed product for the Engineer’s approval.
12.2 Materials 12.2.1 Hardener Proprietary ready to use blend of non-metallic rust free aggregate and cement to be applied as a dry shake to the surface of wet concrete. Compressive Strength
70 N/mm2 (Min) or higher to Engineer’s requirements
Chemical resistance
Resistant to motor oils, mineral oils, hydraulic fuels
Coverage
10 kg/m2 generally; 2.5 kg/linear metre in 80mm wide strips either side of expansion joints.
12.2.2 Sealer Curing compound as recommended by manufacturer for non-slip finish.
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12.3 Execution 12.3.1 Installation Apply screed hardener and sealing coat in strict accordance with the manufacturer’s written instructions. Hardened - power float hardener to a smooth, non-slip finish and apply one coat of sealant. Apply a second sealing coat as a finished surface coating. 12.3.2 On completion Protect from traffic until fully cured.
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Suspended Ceilings
13.1 General 13.1.1 Scope of Work Suspended ceilings shall be as specified in Schedule of Finishes.. 13.1.2 Relevant standards Conform to the recommendations of the following British Standards and Codes of practice where applicable: BS 1191
Specification for Gypsum Building Plasters
BS 1230, Part 1
Gypsum Plasterboard
BS 8000, Part 10
Code of Practice for Plastering and Rendering.
BS 8212
Code of Practice for dry lining and partitioning using gypsum plasterboard.
CP 290
Code of Practice for Suspended ceiling and linings of any dry construction using metal fixing systems.
13.1.3 Fire resisting properties The exposed surfaces of all suspended ceilings are to have “Class O” surface spread of flame all in compliance with the requirements of the local Fire Prevention Officer. In addition the completed proprietary suspended ceiling assemblies are to provide half an hour fire resistance when tested in compliance with the requirements of the local Fire Prevention Officer. 13.1.4 Literature and samples. Provide comprehensive technical literature fully explaining the proposed ceiling installations for the approval of the Engineer. Provide samples of various tile finishes, colours, textures and patterns for selection by the Engineer. Complete sample trial area, corner 3 x 3m prior to commencement of work.
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13.1.5 Shop drawings Provide shop drawings of the proposed suspended ceiling installation for the approval of the Engineer. Shop drawings shall include the following information: -
Room layouts with reflected ceiling plan showing locations of all ceiling mounted items such as light fixtures, a/c diffusers, smoke detectors, etc.
-
Also indicate all other items which are to be located within ceiling space (such as A/C units).
-
Method and location of anchorages to structure.
-
Location, size and detailing of access panels.
-
Location and detailing of movement joints.
13.1.6 Personnel Installation of all suspended ceilings shall be carried out by suitably experienced tradesmen or in the case of proprietary ceilings a franchised applicator of the ceiling manufacturer all to the approval of the Engineer.
13.2 Materials 13.2.1 Plasterboard Plasterboard suspended ceilings shall comprise12.5mm thick standard and for bathroom and wet room moisture resistant plasterboard all with tapered edges or similar plasterboard which conforms to BS 1230 to the approval of the Engineer on proprietary galvanised steel or aluminium suspension system.. Where specified for external use plasterboard to be approved exterior quality gypsum ceiling board. 13.2.2 Ceiling Tiles 13.2.2.1 Steel Ceiling Tiles Metal ceiling tiles; FERRO- Anti Bacterial F90 600 x 600 clip-in system as per manufacturers’ specification. Colour : To engineer's approval. Tiles to be machine cut at all extremities. Tiles to be set-out and co-ordinated with all service location points and lighting layout. Contractor shall prepare a detailed co-ordinated setting out plan for Engineer’s approval. 13.2.2.2 Perforated Metal Ceilings Perforated metal ceiling tiles as per manufacturers specification.
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Colour : To engineer's approval. Comprising Q-clip suspension system, perimeter trims, access panels for services. Electrolytically galvanised steel 0.5mm, micro-perforated Rd 1522 to give alpha sound absorbtion of between 0.66 and 125 and 5000 Hz to DIN 52212. 13.2.2.3 Plain Metal Tile Ceiling Plain polyester powder coated ceiling tiles; 600 x 600; exposed lay-in grid, to approved sample. 13.2.2.4 Mineral fibre ceiling tiles Mineral fibre tiles as per manufacturers specification. Pattern to be fissured or similar to approved sample. 13.2.3 Stonewool Stonewool proprietary suspended ceiling on proprietary galvanised steel or aluminium suspension system. Ceiling tile to be 18mm hygienic as per manufacturer's specification. Plasterboard-related materials Plasterboard nails: Galvanised or otherwise zinc coated steel with 2.5mm minimum shank diameter and 7mm minimum head diameter; lengths as BS 8212 clause 6.3. Jointing accessories As follows: a) Jointing compounds for bedding and finishing joints to comply with BS 6214. b) Joint reinforcing tape to comply with BS 6214. c) External angle : paper tape reinforced on both edges with zinc coated flexible steel strip bonded to the paper. d) Edge and corner beads : galvanised steel to BS 6452 : Part 1 13.2.4 Access Unless the ceiling systems is fully accessible, access panels shall be provided and installed to allow access to mechanical, electrical and any other appurtenance within the ceiling void. Such access panels shall be of proprietary type with hinges as supplied by “Arrow” type CD/PB/SB or CP/PB/SB/F sizes to suit access purpose or equal and approved finished flush with appropriate trim. Fire rating to match remaining ceiling installation.
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13.3 Execution 13.3.1 Setting Out Set out the work with the following objectives: a) To establish the correct ceiling level. b) To establish panel centres and joint lines, etc including the layout at obstructions and in irregular areas. c) To avoid or minimise cutting of ceiling panels. d) To agree the positions of access panels, luminaires, grilles and other services equipment, fire checks and everything else that affects setting out. e) To establish the location of all battens and other fixing points. 13.3.2 Installation Install all ceilings complete and securely fix all components all in accordance with the manufacturer’s written instructions. Also comply with the following: a) Erect the suspension system complete with hangers, primary grid and ceiling grid. b) Provide additional suspension for luminaires, grilles, ducts and other equipment to be supported, including adaptation and span bars, etc where necessary. c) Adapt the system for obstructions, bulkheads and sloping sections. d) Fix fire stopping and insulation e) Fix all perimeter supports f) Fix the ceiling panels and tiles including access panels, luminaires and other equipment including that provided by others. g) Fix perimeter and other trim h) Check and adjust as necessary and leave truly level i) Tolerance shall be 3mm in 3m j) Do not anchor hangers to equipment, pipes, conduits or other appurtenances. k) Incorporate light fittings, a/c units, heat detectors and any other ceilingrelated items in accordance with the approved shop drawings and in compliance with the related manufacturer’s instructions. l) Carefully and neatly trim around appurtenances penetrating the ceiling surface providing custom steel trims where necessary. Provide additional support to adjacent ceiling areas as required.
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13.3.3 Plasterboard ceilings generally Comply with BS 8212 subject to any qualifications given below. The entire suspended ceiling system should be carried out in accordance with the manufacturer’s instructions where appropriate and as directed by the architect where necessary to suit site conditions. 13.3.4 Plasterboard suspension system installation The installation of the ceiling suspension system and the fixing and finishing of the plasterboard is to be carried out in strict accordance with the manufacturer’s instructions. a) Install suspension system in accordance with approved shop drawings. b) Secure 75 x 75mm hardwood perimeter trim, perimeter channels and soffit cleats as required avoiding the use of, or interference with, any mechanical or electrical device already in place. c) Ensure entirely assembly, including timber framing where necessary, is firmly fixed and forms a rigid assembly ready for the installation of the plasterboard. d) Frame around and provide rigid support to any ceiling mounted fitting, including access panels where required. e) The acceptable dimensional tolerance for the assembly is 3mm in 3m. 13.3.5 Plasterboard installation a) The ceiling should be set to the heights shown on the Drawings and should be true and level. b) Secure plasterboard using approved self-tapping galvanised screws to metal framework at maximum 230mm centres. Neatly trim around ceiling mounted fixtures and other appurtenances penetrating the ceiling. Provide and fix trims as necessary. All end joints shall be broken over successive courses and located over a support. Ends of sheets shall be tightly butted and edges lightly butted, the sheets being fixed at 100 mm intervals. Fixings shall be not less than 9 mm from edges of sheets. Where sheeting has been cut, fixings shall not be less than 18 mm from cut edges. Fixings shall be well driven home with heads slightly below the surface, but shall not break the paper. Punches shall not be used. All angles between bulkheads and ceiling and all vertical angles shall be reinforced with 90 mm wide jute scrim set in plaster and trowelled flat. c) Finish all fixing devices, taped joints and edges as recommended by manufacturer to leave a perfectly smooth clean and neat finish without defects ready for painting.
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13.3.6 Painting / Finish Proceed with painting of ceiling surface as soon as possible after installation. Refer “Painting Section” for painting specification. Stone wool ceiling to be finished by cleaning only. If painting is required, special acoustic paint supplied by the manufacturer to be used. 13.3.7 Completion of suspended ceilings Ensure the completed ceilings are thoroughly clean and to the satisfaction of the Engineer before handover.
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Raised Access Flooring
14.1 General 14.1.1 Scope of Work Supply and installation of Raised access floor system in areas specified in the drawings, schedules and specifications. 14.1.2 Relevant Standards BSEN 12825 : Raised Access flooring to be tested and classified in accordance with the requirements specified therein. BSEN ISO 140-12 : Sound transmission to be in accordance to standards mentioned therein. BS 476-20: Thermal Properties to be in accordance to standards mentioned therein. 14.1.3 Literature & samples Provide comprehensive technical literature and samples of proposed system. Submit full details of the proprietary system being proposed for the Engineer’s approval. Submit detailed setting out drawings showing the location of all pedestals, ductwork, floor outlets, trunking and other related service elements for the Engineer’s approval
14.2 Materials Proprietary raised access-flooring system comprising pedestals and removable insert panels complete with all necessary services appurtenances including grilles, trunking etc. Pedestals shall be adjustable to the tolerances required for the installation and to be manufactured in accordance with the following materials. Raised access floor system to be of heavy duty type to have an overall finished height of 600mm and 1000mm as noted on the dwgs. and as supplied by Joint Venture Production from UK or equal approved.
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Panels to be heavy grade of size 600x600x29mm thick in Calcium Sulphate to take finishes as specified in finishes schedules dwgs. 210184- A-500 to 210184- A-502. Tolerances: Length of side - +/- 0.4 mm Squareness - +/- 0.5 mm Straightness of side - +/- 0.5 mm Thickness - +/- 0.3 mm Twist - +/- 0.7 mm Vertical warping – 0.6mm Casing finish – Galvanized Casing material – steel Core material – high strength particle board Structural Perfomance: Ultimate Load: in excess of 9KN Working Load: Point load General Areas - 4.5 kN(25mm x 25mm), th Corridors, 4 Floor and Data Centre areas - 12 kN (25mm x 25mm) Deflection max. under working load condition: 2.5mm Fire Perfomance: Standard, Class O as outlined by UK building regulations Fire resistance, small scale fire test. Thermal properties to conform to BS 476-20 Sound transmission: Sound transmission to conform to BSEN ISO 140-12. All materials used in raised floor system shall be resistant to growth of fungi and micro organisms and attack by insects. Floor panels to be finished with marble, ceramic tiles, 2mm thick anti static vinyltiles, carpet ties, etc. all as per as per finishes schedule. Wear rating to be K5, complying with EN 649 and the International Computer Manufacturer’s standards BS CEC 00015 & DN 51953 which require electrical readings between 5x105 hours and 2x 1010 hours.
14.3 Installation Pedestals to be fixed with screws in accordance with the manufacturer’s specifications. Adjustability to be +/- 40mm. Locking to be by locknut. Cut panels at perimeter edging to be sealed with class O Aluminium foil tape. Floor panel location method to be positive.
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Installation to be carried out by either of the specialist installation companies listed below: A. Access Flooring Ltd The Studio 15 Huntsmead Northamton NN3 5HT England B. JS Flooring 27 Westrow Gardens Seven Kings Ilford, Essex IG3 9NE England C. Level 1 Raised Flooring Ltd 21 Bonney Street Upper norwood London SE19 3RW England All substantial metal parts to be electrically continuous and fully bonded in accordance with latest edition of IEE regulations. Permissible deviation of locks i.e. level as advised by AFA code of practice to be +/- 1.5mm over a length of 3.0 m.
14.4 Inspection and Testing Raised access flooring to be tested and classified in accordance with the requirements of BSEN 12825. Completed installation to be clean, stable and free from bounce and vibration. No lipping to be provided for floor panels.
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Demountable Partitions
15.1 Scope of Work The scope of work is for the supply and installation of proprietary demountable partitions, wall linings and related doors all as detailed on the drawings.
15.2 Standards Comply with the requirements of British Standard BS 5234 :1975, Code of Practice for Internal Non-Load bearing Partitions.
15.3 Submittals Submit full details of the proprietary system being proposed for the Engineer’s approval. Submit detailed drawings of the proposed layout including all elevations and relevant details for the Engineer’s approval. Submit samples of the samples of the system and alternative finished if so requested by the Engineer.
15.4 Materials 15.4.1 Partitons Proprietary demountable (readily Adaptable) partition system comprising exposed white anodised extruded steel posts and rails with either solid or glazed panels. Solid panels to be 2 x 13mm plasterboard sheeting with factory applied colours vinyl fabric finish, with a core of 50mm mineral wool. Glazing to be where shown on the drawings. Glass throughout to be 6mm clear except to corridor walls where it is to be 6mm clear Georgian-wired. Partition system to be equal or superior to “DEKO 1090 by Deko Partitions Ltd.” Fire rating of all partitions to be FR30 (1/2 hour fire resisting), as determined in accordance with BS476: Part 8:1972. Surface spread of flame to be Class O determined in accordance with BS 476: Part 7: 1971
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The noise reduction index of the completed solid partition shall be a minimum of 40 db. A glazed partition shall be a minimum of 38db. The system is to be suitable for use with the relating ceiling installations, complying generally with the details shown on the drawings. The proprietary system is to allow the fitting of arrange of accessories also available from the partition manufacturer. Such items are to include wall –hung cabinets, drawers, shelves, computer desks, hanging rails, signs, pinboards, etc. 15.4.2 Wall Linings Proprietary wall lining system to match the demountable partition system“DEKO 590 by Deko partitions Ltd” or equal and approved. 15.4.3 Partition Doors Proprietary wooden framed mahogany veneered and glazed doors as supplied by approved partition manufacturer. Refer to Section 17- Wooden Doors for details. Note that all wooden doors regardless of finish or location are to be supplied by the approved partition manufacturer. Doors are to be supplied complete with hinges as recommended and supplied by partition manufacturer. The supply and fixing of all other ironmongery items is covered by a provisional sum-refer to Bill of Quantities.
15.5 Installation Install all partitions, wall linings and related doors and such assemblies in strict accordance with the manufacturers instructions and to the complete satisfaction of the Engineer.
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Painting
16.1 General 16.1.1 Scope of Work The painting work includes the following main items: •
Exterior paint to surfaces where specified.
•
Interior paint of ceilings and walls
•
Painting of doors and windows
•
Protection of timber
The exterior paint systems shall be provided with a 3 year warranty. 16.1.2 Relevant British Standards Conform to the recommendations of the following British Standards where applicable: BS 3900
Methods of Test for Paints
BS 6150
Code of Practice for painting of buildings.
BS 5589
Code of practice for the preservation of timber
BS 5493
Etch Primer
16.1.3 Labour Only workmen skilled in painting are to be employed for the purpose of painting. 16.1.4 Accessories All necessary tools, appliances, scaffolding and other accessories required to complete the work shall be provided by the Contractor. 16.1.5 Removal of Related Items All items relating to painted surfaces such as ironmongery, light fixtures, switch plates etc. shall be removed before preparatory work is commenced. Clean and re-fix such items on completion.
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The final interior paint coat is to be applied in co-ordination with the interior works. 16.1.6 Protection Clean dust sheets are to be used for the adequate protection of floors, fixtures and surfaces not to be painted. 16.1.7 Approvals Submit to the Engineer duplicate copies of paint system sheets relating to each of the paints proposed for use. These shall be accompanied by the manufacturer’s paint data sheet which show the manufacturer’s name, the brand name, reference number, colour and description of the paint, the surface preparation to which it is to be applied, the method and location of application, the minimum dry film thickness, the coverage per litre and the number of coats to be applied, all to the Engineer’s requirements. Following the Engineer’s written approval the requirements of the paint system shall be adopted for the works. Ensure that the paint manufacturer’s data sheets cover the conditions at works or at site, including temperature and humidity, under which the paints are to be applied. Any addition of thinners must be made in the store under the supervision of the Engineer and only as allowed by the manufacturer’s data sheet. 16.1.8 Samples Provide finished samples of minimum size 3m x 3m of paintwork as and when required for the approval of the Engineer. 16.1.9 Colours and Tints At the appropriate time provide the Engineer with a full schedule of surfaces to be painted and request details of paint colours required. All colours should be to the approval of the Engineer. 16.1.10 Waste Disposal Provide suitable movable receptacles into which all liquids, slop washings, etc. are to be placed. On no account is such waste to be disposed of in sanitary fittings. All solid refuse or inflammable residue shall be removed from the site. 16.1.11 Storage Provide a suitable store for painting materials in a location approved by the Engineer. 16.1.12 Materials All materials shall be obtained from a manufacturer approved by the Engineer and shall be suitable for the exposure and location.
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All paint, etc. shall be delivered in sealed containers bearing the following information as applicable: i.
Manufacturer’s name, initials or recognised trademark.
ii.
The appropriate title and Specification
iii.
Whether primer, undercoat or finishing coat
iv.
Lead free, if required
v.
Whether for internal or external use
vi.
The colour reference from BS 4800 or as specified
vii.
The method of application (i.e. brush, spray or roller)
The batch number and date of storage and use if highly inflammable or toxic Detailed instructions for storage and use, if highly inflammable or toxic. Containers of materials other than paints listed shall bear as much of the above information as is appropriate. Paint shall be stored in sealed containers in a suitable lock-up store where it is not exposed to extreme temperature sunlight or weather. Any special storage conditions recommended by the manufacturer shall be observed. No paint shall be used beyond a period of 18 months from the date of despatch or date of certificate of re-test. If this period is exceeded, the paint shall be removed from the site. The priming coat, undercoats and finishing coat of paint in any one system shall all be obtained from the same manufacturer. Coats of a paint system shall differ in shade or colour where practicable. 16.1.13 Prevailing conditions Exterior or exposed painting shall not be carried out under adverse weather conditions, such as rain, extreme humidity, dust storms etc. or upon surfaces, not thoroughly dry. 16.1.14 Preparation before proceeding No painting or other thin coat work shall proceed until floors have been washed over, and every possible precaution taken to keep down dust.
16.2 Materials 16.2.1 Paints, stains and other thin coatings 16.2.1.1 General All such thin coating materials are to be proprietary products manufactured and supplied by one reputable company specialising in such items.
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Consideration may, at the discretion of the Engineer, be given to more than one company providing such products, however not in the case of thin coating products which relate to each other e.g. Primer/ under-coat/ topcoat. The paint system shall be used; subject to the Engineer’s approval.
16.2.1.2 Intumescent Coatings Intumescent paint coating to structural steel to one minimum 1 HR fire protection paint to be applied on base coat and primer on prepared surface strictly in accordance with manufacturer’s written instructions. Colour : Blue : Grey to approved sample. The finished paint system shall be certified and approved by R.O.P. 16.2.1.3 Wood and Stain Finishes To be with 2-pack clear polyurethane top coat to approved sample. 16.2.2 Paint System 16.2.2.1 Exterior Masonry Walls Paint system comprising: 2-pack epoxy primer/sealer applied by brush at 60 µm applied to clean and just free surface. Acrylic rolling compound applied at 100µm with special roller to approved textured finish. 2-pack polyurethane top coat applied at 50µm by brush or roller. Colour: To engineer's approved. 16.2.2.2 External Steel Work Etch Primer; 2-pack Polyvinyl Butyral to BS 5493. Applied to D.F.T. of 8µm in accordance with manufacturer’s instructions. High-build epoxy polyamide coating applied to D.F.T. of 125µm or ocean dry and degreased primed surface. 2-pack acrylic polyurethane top coat applied to D.F.T. of 50µm Colour: as directed. 16.2.2.3 Internal Walls One coat of acrylic primer Two coats of stucco putty and Two coats of acrylic emulsion paint. Colour as per engineer's approval. 16.2.2.4 Internal Ceilings Internal ceilings, soffits and areas requiring matt finish shall be: One coat of acrylic primer
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Two coats of stucco putty and Two coats of acrylic emulsion paint. Colour as per engineer's approval
16.3 Execution 16.3.1 Preliminary Checks Ensure that the following conditions exist: a) Timing and sequence agreed with others b) Work by others (that could affect decorations) completed c) Areas of internal work d) Weather tight and maintained at temperature and humidity levels similar to those prevailing after the works are occupied. e) Provision of good lighting f) Provision for clean conditions when the decorating works is in progress. 16.3.2 Ordering Materials Obtain liquid materials in containers sized to suit the extent of the work and to prevent the deterioration of residual quantities in opened containers. (Maximum generally 5 litres) Order early for non-standard colours and any other nonstandard materials. 16.3.3 Order for Working Work in sequence that ensures that finished work is not spoiled by dust and debris arising from subsequent preparatory work. 16.3.4 Access Provide step-ladders and towers etc. Do not stand on finished work and fittings etc. Do not lean ladders against finished surfaces. 16.3.5 Before Commencing a) Remove architectural ironmongery, luminaries and any other removable fitments, etc. that could be contaminated by the painting work or which obstruct areas to be painted or receiving wall linings. Do not re-fix until paint is fully hardened. Liaise with fitters before moving M&E equipment and interior design items. b) Protect surfaces not intended to be coated. c) Protect other finishes, particularly those of an absorbent nature (i.e. carpet). d) Ensure lighting levels are adequate. e) Check moisture content of backgrounds. f) Arrange for the safe disposal of washings and waste materials etc. off the site
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(disposal into drains is forbidden). 16.3.6 Handling and Storage Materials shall be stored in approved locations where they will not interfere with the work of others. Oil rags, waste and similar combustibles shall be removed from the building every night. Under no circumstances shall such combustibles be allowed to accumulate and every precaution shall be taken to eliminate conditions conducive to spontaneous combustion. Observe fire safety precautions and provide suitable extinguishers adjacent to storage areas. 16.3.7 Tests From time to time, at the Engineer’s direction, samples for testing shall be taken from the sealed containers, spray gun containers or from the workmen’s kettles on the works and tested in accordance with BS 3900. In addition the Engineer may require that unopened sealed containers be set aside for subsequent tests. Where such tests show that, though the material taken from open containers is in accordance with the Specification the material in spray gun container or in work-men’s kettles is unsatisfactory, any work coated with such unsatisfactory materials shall be re-executed. Likewise, any work on which the paint is found to be unduly thin shall be prepared again and repainted, all to the satisfaction of the Engineer. If any paint delivered is considered defective or unsatisfactory it shall be set aside and the manufacturers and the Engineer notified immediately. 16.3.8 Preparation of Surfaces 16.3.8.1 Generally Generally all surfaces shall be thoroughly prepared and shall be clean, free from loose and powdery material and sufficiently dry for the subsequent decoration treatment. Each coat of paint shall be thoroughly dry before the next coat is applied. 16.3.8.2 Cement rendering on concrete and blocks Surfaces shall be brushed down thoroughly to remove all dust and loose material. Mortar droppings and nibs shall be removed and defects made good. Efflorescence shall be brushed off as it appears and all decoration deferred until it ceases. The application of paints shall be delayed until sufficient drying to the satisfaction of the Engineer has taken place. 16.3.8.3 Plaster Surfaces shall be brushed down to remove loose material and dust and where directed washed with a minimum of warm water and detergent and allowed to dry.
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Minor defects, cracks and holes, after cutting out as necessary, shall be made good as appropriate and rubbed down flush with the surrounding surface. Efflorescence shall be brushed off as it appears and all decoration differed until it ceases. 16.3.8.4 Softwood and hardwood All surfaces shall be rubbed down smooth with fine abrasive, and dusted off. Sound knots, resinous streaks and bluish sapwood shall be given two coats of knotting which shall extend at least 25mm around the affected area. Nails shall be punched well below the surfaces. After priming, defects such as open joints or nail holes shall be stopped with hard stopping and surface imperfections faced up all as necessary. All such repairs shall be primed before undercoating is applied. Timber to be given translucent finish : shall be finished smooth and even with sharp arises taken off. Surfaces shall be dusted and any excess of natural oil shall be wiped down with white spirit immediately before applying finish. Stop all nail holes and similar depressions with stopping to match the colour of the timber, pressed well in to remove trapped air. Finish off flush with surface. After stopping, fill pore and grain irregularities with filler to match the colour of the timber, remove surplus and run down to leave a smooth and even appearance. Gaboon plywood and similar open-grained surfaces shall be face-filled over the whole surface after priming and rubbed down smooth and dusted off. The moisture content of the wood shall be tested prior to paintwork and shall comply with the requirements of timber work specification but shall never exceed interior 12%, exterior 17%. Hardwood for paint finish which contains an excess of natural oil shall be degreased with white spirit immediately prior to priming and allowed to dry. 16.3.8.5 Architectural iron and steelwork Bare iron and steelwork including sheeting and pipes shall be thoroughly prepared by removing all dirt, rust and loose mill-scale to the satisfaction of the Engineer. Preparation shall include the use of chipping hammers, scrapers, mechanical wire brushes and carborundum grinding discs. The use of mechanical chisels and other impact tools may exceptionally be ordered if in the option of the Engineer their use is necessary. All rivets, welds, angles, joints and openings shall be properly cleaned. All tools shall be operated in such a manner that no sharp ridges or burrs are left and no cuts made in the steel. Dust and other loose material shall be removed after cleaning. Oil and grease shall be removed with white spirit. The priming coat shall be applied before any contamination or rusting occurs.
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In positions inaccessible to manual cleaning and where steel scraping is insufficient, chemical rust remover shall be used, applied liberally. All surfaces treated with rust remover and surrounding areas which might have become contaminated are to be thoroughly washed with fresh water. Priming shall be carried out as soon as practical and in any case the same day. Steelwork primed before delivery and damaged in transit shall have all damaged areas cleaned and patch primed immediately upon delivery. Areas damaged during erection shall be similarly dealt with. Steelwork which is supplied with the final finish applied shall be made good as necessary strictly in accordance with the manufacturer’s recommendations and to the approval of the Engineer. 16.3.8.6 Fibre building board, insulating and wallboard, hardwood, plasterboard and wood wool All boards, slabs and sheets shall be dry and the surfaces well brushed down to remove loose material, dirt and dust. Cut edges require special priming. 16.3.9 Preparation of the Paint All liquid paint shall be thoroughly stirred to a uniform consistency when containers are opened and before being transferred to paint kettles. Thinning for oil paints shall be permitted only exceptionally by agreement with the Engineer. For special paints the thinner and quantities recommended by the manufacturer shall be used. The paint and the like shall be kept well stirred and shall not be used when a thick sediment has settled. Any paint or the like which develops a skin on the contents within the contract period shall be removed from the works. Any residue left in a tin shall not under any circumstances be added to the contents of another tin. The mixing of different paints together shall not be permitted. 16.3.10 Straining Any paint showing bittiness in application shall be strained through fine gauze. 16.3.11 Method of Application The manufacturer’s instructions shall apply together with following guidelines. 16.3.11.1 General All brushes paint rollers, spraying equipment, kettles, etc., used in carrying out the work shall be clean and shall be thoroughly re-cleaned before being used for a different type of class of material.
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16.3.11.2 Brush painting Paint shall be applied so that the finished surface is free from brush marks. Cutting in shall be neatly and accurately performed. All areas or parts shall be laid off correctly. Before any new coat is applied over a preceding one, and any dropping, runs or irregularities shall be removed and the Engineer shall be invited to check. A fresh coat may be applied only when the previous one is completely dry. Each coat, except the last, must be lightly rubbed down with fine glass paper before the next is applied. The minimum thickness of coats when dry shall be 20 to 140 microns. The final colour is to be perfectly even. 16.3.11.3 Spray painting Spray painting will be permitted with approved machines but only in the applications approved by the Engineer. Surfaces adjoining those being sprayed shall be carefully and closely masked. The coating shall be even and adequate and finish shall be free from orange peel appearance, runs, sags, curtaining and other defects. 16.3.11.4 Roller painting Roller painting shall be permitted with mohair or short pile sheepskin rollers but in no case shall it be allowed in application of the following: i. ii. iii.
External work Priming coats Work other than that of a straight forward plain character.
Priming coats shall be applied by brush to give a coat of adequate thickness with no misses and to satisfy the porosity of the surface. The priming shall be well worked into the surface joints and angles. Priming coats applied off site that have suffered from exposure on the site or in transit shall be touched up or re-primed as necessary before undercoating. The work shall be effected only on absolutely dry surfaces in ventilated premises on surfaces free from dirt, dust, grease, strains, etc. Before and during its use, the paint must be kept fully homogenized by stirring and, if necessary, filtering. Painting of exterior work shall not be allowed in damp weather or during rain, or when dew is falling or likely to fall within a few hours. Protect all areas whilst working from paint splashes, drips etc. This may entail covering certain semi-finished areas by tarpaulins, plastic sheets and such like. 16.3.12 Stains and Clear Preservative Stains and clear preservatives are to be applied strictly in accordance with manufacturer's recommendations. 16.3.13 Priming joinery One coat of priming paint shall be applied before delivery to all surfaces of joinery after drying out as described.
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Priming coats shall be applied to treated softwood having a moisture content not exceeding 17 percent in accordance with the Specification. Inspection: Undertake a thorough visual inspection with the Engineer of the completed decorations. The general quality will be judged as follows: a) Satisfactory stopping and filling b) Uniformity of gloss, sheen or texture c) Uniformity of colour and obscuration of substrate d) Freedom from film defects such as runs, sags, wrinkling, bulking or thinning at edges, entrained dust, dirt or paint. e) Accuracy of cutting in f) General cleanliness and an overall appearance of the work. 16.3.14 Completion Carry out remedial work resulting from the inspections to the satisfaction of the Engineer and maintain the finishes in unblemished condition until handover.
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17 Carpeting 17.1 General 17.1.1 Scope of work Supply and installation of carpeting where shown on the drawings or as indicated in the finishes schedule. Carpet shall be laid on approved rubber underlay and secured at edges with gripper rods. Carpet shall be re tensioned after initial bedding-in period. Carpet tiles for offices shall be as manufactured by B.S.B; Heuga; Tretford or equal approved. To approved colour and sample. 17.1.2 Relevant British Standards Conform to the requirements of the following British Standards where applicable: BS 1006
Methods of test for colour fastness of textiles
BS 4223
Methods for determination of constructional details of textile floor coverings with yarn pile
BS 4682
Methods of test for dimensional stability of textile floor coverings.
BS 5229
Method of determination of tuft withdrawal force for carpets.
BS 5325
Code of Practice for the installation of textile floor coverings.
BS 5808
Specifications for underlays for textile floor coverings.
17.1.3 Literature and samples Provide comprehensive technical literature on proposed materials with illustrations of all colours, patterns and textures available. Provide samples of proposed products. Selection of product type, colour, pattern and texture is to be to the approval of the Engineer.
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Full literature is required stating as minimum: • • • • •
Pile fibre weight and height Pile construction Yarn weight and specification Manufacturing process Primary and secondary backing
17.1.4 Record samples Before any carpet laying commences provide two samples each approximately 500mm square cut from each type of specified carpet. Attach a label to each sample stating the brand name and ordering reference. Seal the cut edges if necessary. 17.1.5 Guarantee All carpeting is to be guaranteed for a period of at least 10 years from date of project handover against excessive surface wear, edge ravel, backing separation, shrinking, stretching and static electricity. “Excessive surface wear” means loss of more than 15% by weight of face fibre.
17.2 Materials 17.2.1 Carpet Tiles Proprietary heavy duty commercial quality carpet made from carded fibres formed into a continuous corrugation and bonded with PVC to a hessian backing. •
Pile composition of carpet : 80% animal hair, 20% synthetics.
•
Anti-static level must be below 2.5 KV
•
Carpet to be inherently stain resistant. Flammability tests must comply with BS 4790/6307.
17.2.2 Carpet Accessories and fixing materials This includes edge binding tape, joining materials, grippers, etc. All such items are to be as recommended by the carpet manufacturer, and as approved by the Engineer.
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17.2.3 Edging strip Solid polished brass proprietary strip approximately 5x25mm. Changes in the types of flooring shall occur under the centre of the door separating the two spaces. The brass bar shall be set flush with the hardflooring. 17.2.4 Adhesives As recommended by the floor finish manufacturer of a type that allows the floor covering to be securely installed and easily stripped. The carpet shall not be glued to the floor. Underlay Rubber underlay cushions or as recommended and guaranteed by the manufacturer.
17.3 Execution 17.3.1 Execution Generally Comply with BS 5325 Installation of textile floor coverings and subject to any qualifications given below. Where necessary, check the dryness of the base in accordance with the appendix to the CP. 17.3.2 Preliminary checks Ensure that working conditions and background are suitable . Bases shall be clean and dust-free, smooth, level and dry. Ensure there is sufficient material from the same production run for each specified type to guarantee uniform appearance when laid. 17.3.3 Planning and general layout Wherever possible and appropriate, lay carpet with consideration to the following general requirements; and when in conflict, agree the procedures with the Engineer: a) b) c) d) e) f) g) h)
Seams to run the length of the area. Traffic routes along rather than across seams Light from windows not falling across seams Pile laying away from lighting Seams lining up in direction of manufacture. Avoidance of cross-seams Patterning matched. Underlay seams at 90 degree angle to carpet seams
Lay out flooring material before cutting to layout approved by the Engineer, allowing for ready access to floor trunking or the like.
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Lay out material to minimise cutting and avoid unduly narrow or small cut-offs. 17.3.4 Working with Adhesives Comply with the following when laying carpets on adhesive: a) Clean the base and prime if necessary : allow primer to dry thoroughly. b) Ensure there is adequate ventilation. Do not smoke (tobacco smoke and some adhesive fumes combine to form poisonous gases). c) Spread adhesive to an even coverage without trowel ridges. d) Remove any spilt adhesive with solvent immediately. 17.3.5 Installation generally Installation to be carried out in strict conformance with the manufacturers written instructions. 17.3.6 Completion Leave floor finish clean and adequately protect the completed installations from any contamination or traffic that could harm the flooring till handover.
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Stone Cladding
18.1 General 18.1.1 Scope of Work
Supply and installation of natural sand-stone cladding to walls where indicated on the drawings. 18.1.2 Submittals
Submit comprehensive technical literature detailing the proposed cladding fixing system for the approval of the Engineer. Submit samples of various suitable sandstones for the Engineer’s approval. Submit shop drawings of all facades where stone cladding is required indicating all joints in the cladding and all fixing points; suspension rails; all movement joints, and any other related element pertinent to the design of the installation. 18.1.3 Standards
Generally comply with the recommendations of BS 8298:1989 – Design and installation of natural stone cladding and lining.
18.2 Materials 18.2.1 Sand Stone Cladding Slabs to be approximately 300x600x20mm thick and to the sizes indicated on the drawings. Edges to be square, chamfered or rebated according to location, as indicated on the Drawings.
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18.2.2 Fixing System
Proprietary stainless steel stone cladding support system type “4102-4104 Support Anchor RAP” by “FRIMEDA FIXING SYSTEMS GMBH” or equal and approved manufacturer. The system is to comprise dowelled support and restraint brackets secured to the supporting structure by a channel arrangement either cast in (to new concrete walls) or surface fixed (to existing concrete walls and new steelframed walls). Special supports required for soffits, corners, sloping surfaces, copings, etc. are to be as recommended by manufacturer of fixing system. Provide calculations appropriate to the type of sandstone and the proposed anchor system in accordance with the anchor manufacturer’s recommendations for the Engineer’s approval. Fix anchors to solid blockwork or reinforced concrte only. 18.2.3 Joint Filler and Sealant
Joint filler to be polyethylene strip as specified in “Joints, Sealants and Joint Covers” Section. Sealant to be either 1 part polyurethane; 2 part poly-sulphide to BS 4254; or 2 part polyurethane (non sag type).
18.3 Execution 18.3.1 Fixing System
Install support channels by an appropriate approved method in accordance with the approved shop drawings, and the recommendations of the manufacturer. 18.3.2 Stone
Install support and restraint clamps and stone slabs ensuring proper vertical and horizontal alignment, all in accordance with the manufacturer’s instructions. Comply generally with the installation recommendations of BS 8298:1989 Joints, except for compression and movement joints, to be 5mm wide.
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External corner joints to be mitred and birds mouthed unless otherwise noted on the Drawings. 18.3.3 Compression and Movement Joints
Incorporate compression and movement joints in accordance with the recommendations of BS 8298:1989. Generally locate 15mm horizontal compression joints at every floor level; and 10mm wide vertical movement joints at maximum 6m centres. 18.3.4 Joint Filling
Except for compression and movement joints fill with pigmented sand:cement mortar, taking care not to discolour the stone face. Joints to be flush. For compression and movement joints use joint backing and sealant as specified herein. Finished sealant joint to be slightly dished.
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Metal Cladding General
19.1.1 Scope of Work
Supply and installation of single skin aluminium ventilated cladding for external walls as shown on the drawings. 19.1.2 Submittals
Provide comprehensive technical literature fully detailing the proposed product and related details for the Engineer’s approval. Provide comprehensive shop drawings fully detailing the proposed installations for the approval of the Engineer. 19.1.3 Personnel
Ensure that only personnel skilled in the installation of this kind of work are employed.
19.2
Material
19.2.1 Aluminium Cladding
Proprietary single skin aluminium cassette Rainscreen Cladding, Luxalon® from Hunter Douglas Luxalon® or equal approved comprising of smooth aluminium alloy 3005/ steel / stainless steel / zinc / copper of 2mm thk. installed on primary support structure fixed horizontally The panels to be of width 600 to 800mm module in variable lengths up to 2500 mm. as mentioned on the drawings and to align with the cill and lintel levels of openings. Colour of cladding to be RAL 9016 in PVF2/Luxacote or equivalent finish.
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19.2.2 Fixing Devices The panels will be fixed to and supported by the Hunter Douglas Construction Elements proprietary aluminium support carrier system and adjustable connectors as necessary. Appropriate fastener having regard for the pull-out / cantilever effect the clamp will have on the fastener and its relationship to the wind load criteria.
19.3 Execution 19.3.1 Installation
Prepare shop dwgs. of the cladding taking into consideration window cill and lintel levels, for the Architect’s approval. Installation of the aluminium cladding to be in full compliance with the manufacturer's instructions. END OF SECTION
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Joints, Sealants and Joint Covers
20.1 General 20.1.1 Scope of Work Supply and installation of sealants and joint covers as called for on the Drawings and in the Specification. 20.1.2 Relevant British Standards Conform to the recommendations of the following British Standards where applicable: BS 4254
Specification for two part polysulphide based sealants
BS 5212
Cold applied joint sealants system for concrete pavements
BS 5215
One part gun grade polysulphide based sealants.
BS 5889
Silicone based building sealants
BS 6213
Guide to selection of constructional sealants.
20.1.3 Literature Provide a complete schedule of sealants proposed for use on the job, listing type; manufacturer; composition; colour; primer; joint width/depth ratio; backing material; for each application. Submit comprehensive literature describing the proposed sealants for the approval of the Engineer. Submit comprehensive literature detailing the proposed joint covers including installation detail and samples for the Engineer’s approval.
20.2 Materials 20.2.1 Sealants All sealants should be proprietary products, recommended by the manufacturer for the intended purpose. a) one part polysulphide to BS 5215 b) flexible epoxide
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c) two part polysulphide to BS 4254 d) two part polyurethane e) mastic strip f) acrylic resin (solvent type) g) one part elastomeric to BS 5215 Other product types may only be used after approval by the Engineer. 20.2.2 Joint filler Joint filler shall be closed-cell non-absorbent low density durable sheet, rectangular strip or circular strip as required. Fibre board joint filler where shown on the Drawings shall be compressed sheet of high grade bitumen impregnated fibres compounded into compressible non-extruded board. The pressure required to compress the material 50% of the original thickness shall be approx. 3.1N/mm2, following which recovery shall be not less than 77%. 20.2.3 Backing Strip If so recommended for use by the sealant manufacturer, backing strips shall be proprietary closed cell expanded polyethylene strip of a diameter applicable to the width of the joint being filled. 20.2.4 Primer Primer, if required, to be as recommended by sealant manufacturer. 20.2.5 Expansion Joints Expansion joints in wall and floor finishes shall be provided in the locations indicated on the Drawings for joint widths as noted and total movement as specified. 20.2.6 Joint Covers Proprietary extruded bronze expansion joint cover suitable for 20mm wide joint with movement allowance of 10mm. Colour of rubber insert to suit internal finish. Colour of rubber insert to suit internal finish.
20.3 Execution 20.3.1 Installation Generally Installation of joint filler or backing strip and sealant to be carried out in strict compliance with the sealant manufacturer’s instructions.
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20.3.2 Preparation Thoroughly clean the surface to which sealant is intended to adhere. Prime surfaces in accordance with sealant manufacturer’s written instructions if so recommended. Mask adjacent surfaces to ensure straight and even edges. 20.3.3 Tolerances Width of proprietary joints shall not vary by more than ± 2mm from the nominal width. Width of formed joints shall not vary by more than 5% over the full length of the joint. 20.3.4 Application of various sealant types a) Floors/traffic areas: 2 part polysulphide or 2 part polyurethane or flexible epoxide b)
Parapet flashing and other similar roof locations : acrylic resin (solvent type)
c)
Joints of windows and doors with structure : 1 part polysulphide
d)
Ceramic wall tiling : 1 part polysulphide
e)
Joints of sanitary ware with ceramic tiling : flexible epoxide
f)
Movement joints in block work : 2 part polysulphide
g)
Concrete pavement joints : 2 part elastomeric
All sealants to be either hand or gun applied in accordance with manufacturer’s instructions. 20.3.5 Joint Covers Install all joint covers in accordance with the manufacturer’s instructions ensuring a neat finished joint with all adjacent floor/wall finishes. 20.3.6 Completion Completed sealant joint to be tooled if necessary to obtain a neat regular finish either flush or slightly dished to the abutting surfaces.
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Sanitary Ware
21.1 General 21.1.1 Scope of Work Supply and installation of sanitary ware appliances, all fittings and fixtures as specified in the drawings, schedules and specification. 21.1.2 Relevant Standards BS 6465 : Sanitary installations BS 6465 : 1984 Code of Practice for scale of provision, selection and installation of sanitary appliances. BS 8000 Workmanship on building sites. 21.1.3 Literature and Samples Provide comprehensive technical literature on all sanitary appliances together with illustration of colours, shapes etc. 21.1.4 Samples Provide samples of each type of fitting. Selection of all materials shall be to the approval of the Engineer.
21.2 Materials Sanitary ware shall be vitreous china; complete with all accessories. Colour : to be white unless specified otherwise.
21.3 Fixing Securely fix all appliances, following the manufacturer’s site work instructions and the following: Where they are subjected to frequent wet conditions use copper alloy or stainless steel fixings and fastenings, unless the appliance manufacturer has supplied fixings and fastenings or has provided instructions about which fixings and fastenings are satisfactory.
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Do not embed any appliance in the wall surface finish except where specified. Do not use supply or discharge pipe work to support or fix appliances. Where the appliance is seated with its weight carried directly on the floor, ensure that the seating is level and even; if necessary on hard floors, where it is intended that an appliance makes continuous contact with the floor, use mortar (cement: sand 1:6) no thicker than 20mm as laid on hard setting mastic to point around and under the appliance. Ensure that appliances are fixed at the required position and height and are fixed plumb and level so that surfaces designed with falls and drain as intended.
21.4 Sealant Seal between all appliances except, normally, cisterns, and the building structure as follows: a) Ensure that the correct specified type of sealant is used. b) Ensure that the finishes to backgrounds are complete and the surfaces to receive the sealant are clean and dry. c) Remove the minimum necessary of any protective covering to give access for the application of the sealant. d) Apply sealant in accordance with the manufacturer’s site work instructions and leave a neat smooth surface and watertight joint.
21.5 Protection a) Keep protective coatings in place as long as practically possible up to handover. b) Replace any appliance which are chipped, cracked, scratched, distorted or otherwise damaged. c) Do not stand in or on any appliance d) Do not use appliances.
21.6 Inspection and Testing Examine sanitary appliance for damage and satisfactory operation of appliances and fittings prior to inspection for handover, remedy any faults observed.
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Wall Guard Systems
22.1 General 22.1.1 Scope of work Wall Guard system for wall protection and decoration 22.1.2 Standards A. American Society for Testing and Materials (ASTM) B. National Building Code of Canada (NBC) C. National Fire Protection Association (NFPA) D. Society of Automotive Engineers (SAE) E. Underwriters Laboratory (UL) F. Underwriters Laboratory of Canada (ULC) G. Uniform Building Code (UBC)
22.2 System Description Performance Requirements: Provide wall guard systems that conform to the following requirements of regulatory agencies. •
Fire Performance Characteristics: Provide UL Classified wall guards conforming with NFPA Class A fire rating. Surface burning characteristics, as determined by UL-723 (ASTM E-84), shall be flame spread of 10 and smoke development of 350 - 450. Provide ULC (Canada) listed wall guards conforming to the requirements of the National Building Code of Canada 1990, Subsection 3.1.13. Surface burning characteristics, as determined by CAN/ULC-S102.2, shall be flame spread of 15 and smoke developed of 35.
•
Self Extinguishing: Provide wall guards with a CC1 classification, as tested in accordance with the procedures specified in ASTM D-635-74, Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Self-Supporting Plastics in a Horizontal Position, as referenced in UBC 52-4-1988.
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•
Impact Strength: Provide rigid vinyl profile materials that have an Impact Strength of 30.2 ft-lbs/inch of thickness as tested in accordance with the procedures specified in ASTM D-256-90b, Impact Resistance of Plastics.
•
Chemical and Stain Resistance: Provide wall guards that show resistance to stain when tested in accordance with applicable provisions of ASTM D-543.
•
Fungal and Bacterial Resistance: Provide rigid vinyl that does not support fungal or bacterial growth as tested in accordance with ASTM G-21 and ASTM G-22.
•
Color Consistency: Provide components matched in accordance with SAE J-1545 - (Delta E) with a color difference no greater than 1.0 units using CIE Lab, CIE CMC, CIE LCh, Hunter Lab or similar color space scale systems.
22.3 Submittals • • • •
Product Data: Manufacturer’s printed product data for each type of wall guard specified. Detail Drawings: Mounting details with the appropriate fasteners for specific project substrates. Samples: Verification samples of wall guard, 8" (203mm) long, in full size profiles of each type and color indicated. Manufacturer’s Installation Instruction: Printed installation instructions for each wall guard.
22.3.1 Delivery, Storage And Handling • Deliver materials in unopened factory packaging to the jobsite • Inspect materials at delivery to assure that specified products have been received. • Store in original packaging in a climate controlled location away from direct sunlight.
22.3.2 Project Conditions A. Environmental Requirements: Products must be installed in an interior climate controlled environment.
22.4 Manufacturer Provide all wall Guards and wall protection from a single source.
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22.4.1 Manufactured Units 22.4.1.1 Wall Guard Profile • Wall Guard, 4" (152mm) height x 1" (25mm) depth 22.4.1.2 Materials • Vinyl: Snap on cover of .080" (2mm) thickness shall be extruded from chemical and stain resistant polyvinyl chloride with the addition of impact modifiers. No plasticizers shall be added (plasticizers may aid in bacterial growth). • Aluminum: Continuous aluminum retainer of .080" (2mm) thickness shall be fabricated from 6063-T5 aluminum, with a mill finish. 22.4.1.3 Components • End caps, inside corners, outside corners and brackets shall be made of injection moulded thermoplastics. • Fasteners: All mounting system accessories appropriate for substrates indicated on the drawings shall be provided. 22.4.1.4 Finishes • Vinyl Covers: Colours of the wall guard to be selected by the architect. Surface shall have a pebblette texture. • Moulded Components: End caps, inside corners, outside corners and brackets shall be of a colour matching the wall guards. Surface shall have a pebblette texture.
22.5 Execution 22.5.1 Examination • Examine areas and conditions in which the wall guard systems will be installed. • Complete all finishing operations, including painting, before beginning installation of wall guard system materials. • Wall surface shall be dry and free from dirt, grease and loose paint.
22.5.2 Preparation • General: Prior to installation, clean substrate to remove dust, debris and loose particles.
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22.5.3 Installation Locate wall guard as indicated on the approved detail drawing for the appropriate substrate, and in compliance with the IPC installation instructions. Install wall guard level and plumb at the height indicated on the drawings. Installation of Wall Guards: • Cut the aluminum retainer to the desired length, allowing 37mm for each end cap, 38mm for each inside corners and 14mm for each outside corner. • Using a 1/4" drill bit, drill holes in the centerline of the aluminum retainer 102mm from each end and spaced evenly over the entire length (6 anchors per 3.66m length). • Position and level the aluminum retainer on the wall, allowing for end caps and corners, and transfer mounting holes to the wall with a marker. Drill 1/4" (6mm) holes at each mark and position ALLIGATOR anchors into the holes on the wall. Mount the retainer with #10 x 1-3/4" phillips pan head screws and tighten the screws to secure the retainer. • Slide the end caps and corners onto the aluminum, leaving a 1/16" gap for adjustments, and secure with one 1-1/4" self-tapping screw per end cap or two per corner. • Cut the vinyl cover to the distance between the end caps/corners. NOTE: Trim all factory edges square before installation. Position the vinyl cover on the aluminum retainer starting at one end and working to the other end by pushing the cover over the aluminum until it snaps into place.
22.5.4 Cleaning At completion of the installation, clean surfaces in accordance with the manufacturers clean-up and maintenance instructions.
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External Work – Ground Finishes
23.1 Scope This Specification covers the requirements for materials and workmanship for the installation of kerbs and paved surfaces.
23.2 General 23.2.1 Related British Standards and Other References BS 435:1975 Specification for dressed natural stone Kerbs, channels, (1993) quadrants and setts. BS 3921:1985
Specification for clay bricks.
BS 5931:1980
Code of Practice for machine laid in-situ edge details for paved areas.
BS 6677
Clay and calcium silicate pavers for flexible pavements. Part 1:1986
Specification for pavers
Part 2:1986 Code of Practice for design of lightly trafficked pavements Part 3:1986 BS 6717
Method of construction of pavers
Pre cast concrete paving blocks Part 1:1986
Specification for pavers
Part 2:1986 Code of Practice for design of lightly trafficked pavements
BS 7263
Part 3:1986
Method of construction of pavers
Part 1:1993
Specification for pavers
Part 3:1989
Code of Practice for laying.
Pre-cast concrete flags, kerbs, channels, edgings and quadrants Part 1:1990
Specification
Part 2:1990
Code of Practice for laying.
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BS 7533:1992
Guide for structural design of pavements constructed with clay or concrete block pavers
BS 882 : 1983
Dry sharp sand
23.2.2 Definitions For the purposes of this Specification the definitions given in the British Standards listed in Appendix ‘A’, as appropriate shall apply. 23.2.3 Levels, Reference Points and Setting-Out The Works are to be set out from primary datum levels and setting out points indicated on the drawings or as directed by the Engineer on site. The Contractor shall submit his proposals for setting out and controlling the alignment of the Works to the Engineer and obtain his approval prior to the start of construction. The Contractor shall supply to the Engineer details of the value and location of all temporary benchmarks and reference points he establishes. Should the Contractor dispute the original ground levels shown on the drawings, he shall agree these with the Engineer prior to disturbing the original ground. 23.2.4 Related Works The Contractor shall carefully examine all of the Contract Documents for requirements which affect the works covered by this Section. Where materials used in this Section have been Specified elsewhere, the relevant clauses shall apply to this Section. Materials that have not been individually Specified shall be of first quality and the minimum standard acceptable shall be that of the relevant British Standard where applicable. 23.2.5 Quality Assurance 23.2.5.1Source Granites, marbles and natural stones shall be provided from a single source and through a single supplier. Stone materials shall comply with the standards of the National Granite Quarries Association. 23.2.5.2Mock-ups Before commencing the primary works covered by this section, the Contractor shall provide mock-ups of the representative installation for approval of the Client and the Engineer. Approved mock-ups shall be protected through the course of the Works and shall be used as a basis for the acceptance of the completed works. Acceptable mock-ups may be incorporated as part of the finished works.
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23.2.6 Submittals 23.2.6.1 Product Data The Contractor shall submit manufacturer’s product data, installation instructions, use limitations and other recommendations. Certificates of Compliance shall be provided from each manufacturer. 23.2.6.2 Verification Samples The Contractor shall submit representative samples of each element that is to be incorporated into the finished Works. Samples shall show the full range of colour and finish variations that may be expected. At least 4 No. un-mounted units are to be provided. 23.2.6.3 Shop Drawings The Contractor is to provide for Engineer’s approval, large-scale shop drawings for the fabrication of all stonework. The drawings shall include plans and details of the exact size, shape, profile, curvature, joinery, finish and proposed fixing methods. 23.2.7 Delivery, Storage and Handling Deliver, store and handle stone units in strict compliance with manufacturer’s instructions and recommendations. Materials shall be stored above ground and protected from damage and soiling. 23.2.8 Project Conditions 23.2.8.1 Weather Work shall be executed only when the existing and forecasted weather conditions are within the limits established by International Masonry AllWeather Council – Guide Specification, and the mortar admixture manufacturer. 23.2.9 Substrates Proceed with work only when substrate construction works are completed. 23.2.10 Extra material The Contractor shall provide wrapped, packaged and labelled additional material consisting of three (3No) pieces of each type, size and configuration of stone used on the project, delivered to the location as directed by the Engineer.
23.3 Materials 23.3.1 General Where materials used in this Section have been Specified elsewhere, the relevant clauses shall apply to this Section.
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23.3.2 White Cement and Aggregate White cement shall be obtained from an approved manufacturer and shall comply with the relevant British Standard. (BS: 12). White aggregate shall be of a colour approved by the Engineer and shall comply in all respects with the requirements for concrete aggregates. 23.3.3 Pre-cast Concrete Kerbs Pre-cast concrete kerbs, channels, edgings and quadrants shall comply with BS7263:2001 Parts 1 to 3. Components shall be hydraulically pressed, laid and bedded on a Class II mortar bed of not less than 10mm and not more than 40mm on a foundation of concrete Grade M20. For radii of 12m or less, appropriate radius kerbs shall be used. Short, straight sections of kerb shall not be used for these radii without the Engineer’s approval. Prior to backing with concrete, the kerb line shall be checked for line and level and the foundation shall be thoroughly cleaned and wetted. Any units deviating by more than 3mm in 3m from line and level shall be taken up and re-laid. The level of any part of the kerb line shall not deviate by more than 3mm vertically from the Specified level. Where filling behind the kerbs is likely to have harmful effect; the kerb, backing and foundation shall be protected by a method agreed with the Consultant or as shown on the drawings. Joints between pre-cast units are to be left open. Expansion joints of 3 to 5mm width are to be placed at 6m centres in both foundation and backing. 23.3.4 Granite Kerbs and Paving Stone and granite shall be obtained from a reputable and approved supplier. Sizes Shall be provided as shown on the drawings and as Specified below: Stone and granite within vehicular areas.
5 cm thick.
Stone and granite within pedestrian areas.
3 cm thick.
Stone and granite shown on the drawings to occur in radial patterns shall be fabricated in a curved shape to conform to the radii shown on the drawings. 23.3.5 Mortar and Grout Materials for Stone & Granite Paving 23.3.5.1Dry areas Portland Cement ASTM C-150 Portland Type I or II Colour: Cement white Hydrated Lime
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ASTM C-207
Type S
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Aggregates
ASTM C-144
Joints less than 6mm
Graded with 100% passing the No8 sieve and 95% the No16 sieve.
Pointing mortar
Graded with 100% passing the No16 sieve
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23.3.5.2Coloured mortar and grout pigments Shall be natural or synthetic oxides and chromium oxides, compounded for use in mortars. Only pigments with a record of satisfactory performance in stone mortars shall be used. Colour shall be selected from the full range of manufacturer’s standard colours and shall be to the Engineer’s approval. 23.3.5.3 Water Clean, non alkaline and potable. Water is not to be used in latex modified grouts or mortar mixes. 23.3.5.4 Wet areas Mortar materials Contractor shall provide latex modified Portland cement thick bed mortar to comply with the directions of the latex additive manufacturer and as necessary to produce a stiff mixture with a moist surface at time of setting stones. Thickset mortar latex additive
Mortar Admix or equal and approved.
Adhesive coat
Mortar Additive Filler Powder to engineer's approval.
Bond coat:
Latex Additive Filler Powder to engineer's approval.
Thick-bed mortar reinforcing mesh
SS type to Engineer’s approval
Grout materials Provide latex modified Portland cement, factory blended to comply with the directions of the latex additive manufacturer. Grouting mortars
Laticrete Dry Set Grout or equal and approved
Dowels
To be stainless steel type (SS) to Engineer’s approval.
23.3.5.5Clay Pavers and Kerbs Clay pavers shall conform to the following: Square edged pavers
200x100x65mm
Ribbed chamfered pavers
200x100x65mm
Classification
Type PB; BS 6677:1986 CL.4
Texture:
Wire cut or drag faced
Compressive strength:
Greater than 70N/mm2 BS 3921:1985:CL.7
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Transverse breaking load
Greater than 7kN – BS 6677:1986:CL.6
Liability to efflorescence
Nil – BS 3921:1985:CL.6
Tolerance
In accordance with BS 677:1986:CL.5.2
Mean wet skidding resistance value
Greater than 60 to BS 6677:1986:CL.7
Water absorption
Less than 7% to BS 3921:1985:CL.8
Colours:
Buff Red Brown
Bricks shall be as supplied by: •
Bricks shall be bedded on 50mm sharp sand on an approved sub-base or on 20mm mortar bed on 150mm thick concrete foundation. The Contractor shall allow for providing samples of each brick type and for the construction of 2.0m x 2.0m sample panels for approval of the Client and Engineer.
•
Pavers in vehicular area shall be laid on a bed of mortar complying with Class (i) of BS 5628.
•
Sand for mortars shall comply with the requirements of Grading M as contained in Table 5 of BS 882.
•
Joint filling shall be in similar mortar with the addition of a colouring agent to the approval of the Engineer.
•
Pavers shall be buttered with joint filler and placed onto the prepared bed immediately after application of the cement slurry. Additional mortar shall be carefully placed in the joints as required and the surplus removed, a joint profile being formed with the appropriate tool.
•
Pointing shall be keyed unless otherwise specified.
•
Care shall be taken at al times to prevent the staining of pavers resulting from excess mortar or slurry entering the surface texture of the block.
•
Movement joints shall be provided to the Engineer’s approval.
23.4 Pre-cast Concrete Paving Blocks 23.4.1 Materials PC concrete paving blocks shall conform to the following:
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Roads and parking areas
200x100x80mm
Pedestrian walkways
200x100x60mm
Dimensions and tolerances:
Length+ 2mm Width+ 2mm Thickness+ 3mm Plain
Chamfered
60/65
1.00
1.06
80
1.12
1.18
100
1.18
1.24
Correction factors for chamfers and thickness
Arises
Wearing surface not less than 70% of the plan area Arises to be clean, plane and uniform in dimension
Cement
To BS 12, 4027 or BS 146. Cement content of compacted concrete not less than 400kg/m
Texture
To approved sample
: Compressive strength
Average of not less than 49N/mm2 in wet conditions No individual block to be less than 40N/mm2
Aggregates
In accordance with BS 882
Salt content limits
Acid soluble chlorides: 0.06% by wt fine aggregate 0.02% by wt coarse aggregate Acid soluble sulphates: 0.3% by wt of fine aggregate 0.3% by wt of coarse aggregate Clean and free from deleterious matter pH. value in basic range 7.9 : Total dissolved solids 2000 mg/litre
Water in production
Chlorides:
600 mg/litre
Sulphates
500 mg/litre
Alkali carbonates & bicarbonates
1000 mg/litre
Liability to efflorescence
Nil – BS 3921:1985:CL.6
Tolerance
In accordance with BS 6677:1986:CL.5.2
Mean wet skidding resistance value
Greater than 60 to BS 6677:1986:CL.7
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Water absorption
Less than 7% to BS 3921:1985:CL8.
Colours:
Buff / Red / Brown
Pigments:
Shall comply with BS 1014 Blocks shall be through coloured for entire thickness
23.4.2 Sampling Two blocks shall be drawn from each group of 1000 blocks for sampling 10No blocks in every designated 5000 block section or part thereof in a consignment. All samples shall be clearly marked at the time of sampling in such a way that the designated section or part thereof and the consignment represented by the sample are clearly defined. 23.4.3 Test for Compressive Strength Testing shall be undertaken in accordance with BS 1881. The sample specimens shall be tested in a wet condition after being stored for at least 24 hours in water maintained at a temperature of 27ºC ± 3ºC. The Contractor shall, where instructed, arrange to test and submit the results of such testing to the Engineer. All costs for such testing are deemed to be included in the Tender. 23.4.4 Test for Water Absorption Blocks shall be tested for water absorption in accordance with BS 1881. Blocks shall be deemed to be acceptable provided that the maximum absorption does not exceed: 2% after 10 minutes 5% after 24 hours 23.4.5 Certificate of Compliance The Contractor is to furnish a Certificate of Compliance furnished by the manufacturer at the time of sale in accordance with Item No12 of BS 6073, where the independent laboratory mentioned therein shall be the Oman Government Testing Laboratory or other testing laboratory approved by the Engineer. 23.4.6 Granite and Stone Finishes External granite for use in paved and trafficked areas shall be nominally 30mm thick; cut to size and shape as shown on the drawings. All external granite shall be “framed” to approved sample to give a non-slip textured finish. Granite “setts” for use on speed control humps to be saw-cut to a depth of 6mm into the slab and framed in-situ. External granite shall be as per detail drawings. Contractor shall provide control samples of selected granites for approval.
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Approved samples shall be retained on site for quality assurance against delivered materials. 23.4.7 In situ and Pre-cast Colour Conditioned Concrete In situ colour-conditioned concrete shall be poured on fully cured RC slab to the Engineer’s approval. Colour conditioning admixtures shall be as per engineer's instruction. Preparation of coloured condition concrete paving shall be undertaken in strict accordance with the approved admixture manufacturer’s written instructions. Finished depth:
Pedestrian areas: 65mm Vehicular area: 100mm
Classification
Water reducing, set-controlling admixtures for architectural concrete. Materials to BS 5075 : Part 1
Colouring:
CHROMIX Admixtures for Colour Conditioned Concrete Standard colour range
Coverage rate
6kg/m2
Construction joints
5mm with edges rubbed down to a small 2-3mm chamfer
Shear wet sliding resistance
Greater than 70 to BS 6677:1986
Water absorption
Less than 18% to BS 3921:1985:CL.8
23.4.8 Sealer The completed concrete paving shall be sealed with a premium quality, durable, water based clear sealer. The sealer must only be applied as a thin coat at the rate of 7 – 10m2 /litre. 23.4.9 Textures and Patterns Textures and patterns should be formed only with a special applicator using floats and imprinting skins. Applicators shall have minimum 10 years experience of undertaking such work. The Contractor shall allow for providing samples of different patterns in 2m x 2m bays for Client approval. 23.4.10 Natural Stone Boulders All natural stone shall be water-worn boulders and pebbles from approved local wadi sources. Boulders shall be selected to give a natural appearance. Colour of boulders shall be light to medium brown to approved sample.
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Boulders shall be free of holes, chisel marks, saw cuts or scuffs. Boulders shall be supplied in a range of sizes from 300mm diameter to 1500mm diameter. Placement and orientation of boulders shall be as directed by the Engineer on site. 23.4.11 Cobbles All natural stone shall be water-worn cobbles from approved local wadi sources. Cobbles shall be selected to give a natural appearance. Colour of boulders shall be light to medium brown to approved sample. Cobbles shall be supplied in a range of sizes from 100mm dia. to 300mm dia. Placement of cobbles shall be as directed by the Engineer on site. 23.4.12 Gravel Gravel to be water-worn. (Crushed gravel will not be accepted). Colour of gravel to be mixed; light to medium brown. Gravel shall be supplied in the following sizes: 2-5mm dia. 10-20mm dia. 20-100mm dia. Gravel shall be placed to a minimum depth of 100mm to the approval of the Engineer.
23.5 Workmanship 23.5.1 Pavement Construction – Sand bedding. The sub grade and sub- base shall be prepared in accordance with this Specification and to the Engineer’s approval. The laying course shall consist of sharp sand to BS 882 with a particle size of 4mm, containing not more than 3% silt and/or clay by weight. The sand shall be obtained from a single source, allowed to drain before use, and shall be covered with suitable sheeting to minimize moisture changes. Permissible sulphate and chloride contents shall nor exceed 0.4% and 0.06% respectively. (Expressed only as SO3 and C1 by weight). The laying course shall be laid to a compacted thickness of 50mm unless otherwise Specified plus a surcharge necessary to provide the final bed thickness after vibration of the block paving. During laying the sand shall be carefully screeded to a smooth surface to receive the paving blocks.
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No compaction of the sand layer and no traffic, including pedestrian traffic, are to be permitted before the blocks are laid. The profile of the laying course shall be similar to that of the finished surface. The maximum deviation from the design levels shall be +10mm. The edge restraints to the paved area shall be laid in advance of the laying course and all obstacles within the area, such as manhole covers, shall be constructed to the correct finished levels. The paving blocks shall be laid on the sand laying course in such a manner as not to disturb the blocks already laid. Each block shall be placed firmly against its neighbour so that they fir closely together. Joints between blocks shall not exceed 3mm. Where blocks do not fit at the edge restraints or other obstructions such as manhole covers or up stands, the gaps shall be filled using cut blocks. Blocks shall only be cut using a saw. Guillotine cutters will not be allowed on site. Any damaged or broken blocks shall be discarded. Blocks damaged during compaction shall be replaced at the discretion of the Engineer. Due allowance shall be made in the final levels of the base for the compaction of the laying course above, which occurs when paving blocks are being vibrated. The amount of surcharge required for the laying course shall be determined by site trials prior to the commencement of the actual surfacing and shall be repeated when the source of sand supply or a change of weather conditions occurs. 23.5.2 Compaction of concrete blocks After each 20m2, has been laid (or such area that has been agreed with the Engineer) the blocks shall be compacted to the levels required using a rubber soled plate vibrator. The plate vibrator shall have a plate area of 0.20 to 0.35m2 and have a compaction force of 12 to 24 kN and a frequency of approximately 75-100 Hz. A minimum of two passes of the plate vibrator shall be made in each direction; i.e. at 90º to each other. Vibration shall continue until no further compaction of the sand layer is apparent. Fine dry sand with particle size of 0.3mm shall be brushed over the paving, and further passes of the plate vibrator made in each direction until the sand is no longer absorbed into the joints. The plate vibrator shall not pass closer than 1m to a temporarily unrestrained edge during laying. No paving shall be left un-compacted overnight, except for the one meter strip at the temporarily un-compacted edge, which shall be covered and protected from inclement weather. 23.5.3 Accuracy On completion, the finished surface level shall be within 5mm of the design level and the maximum deviation within the compacted surface, measured by a
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3m straight edge, shall not exceed 5mm. The level of any two adjacent blocks shall not differ by more than 2mm. Any areas of paving which do not comply with these tolerances shall be removed, and sand laying courses lifted and re-laid together with the blocks at the correct line and level. Dimensional accuracy, uniformity of joint gaps, alignment and square ness, shall be checked after paving the first three rows of blocks and thereafter at regular intervals. If the joints begin to open the blocks shall be knocked together using a hide mallet. 23.5.4 Protection of Paving All paving shall be protected from trafficking and saturation until all materials are fully cured. 23.5.5 Pavement Construction – Mortar bedding 23.5.5.1 Examination Examine surfaces to receive stone or paving specified under this section, and conditions under which paving will be installed, with the installer present, for compliance with the requirements for installation tolerances and other conditions affecting performance of stonework. Do not proceed with the installation until unsatisfactory conditions have been corrected. The installer shall be fully responsible for accepting the condition of such surfaces, prior to initiation of the Work. The Contractor shall ensure that surfaces to receive stone paving are firm, dry, clean and free of oily or greasy films, mortar, soil and other foreign substances. 23.5.5.2 Installation The Contractor shall strictly comply with the supplier’s and manufacturer’s instructions and recommendations, except where more restrictive requirements are specified in this section. Clean the sub base to remove all dirt, dust, debris and loose particles. Where blocks do not fit at the edge restraints or other obstructions such as manhole covers or up stands, the gaps shall be filled using cut blocks. Blocks shall only be cut using a saw. Guillotine cutters will not be allowed on site. Any damaged or broken blocks shall be discarded. Blocks damaged during compaction shall be replaced at the discretion of the Engineer. Use full, uncut units to the greatest extent possible. Install pavers in a full mortar bed and dowel to the substrate conforming to the following requirements: •
Prepare setting bed over sub-slab – Portland cement concrete paving.
•
Mix and prepare mortar in compliance with mortar/grout manufacturer’s instructions and recommendations. Compact setting bed and screed to
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proper depth so that tops of pavers will be level with grades and as indicate don the drawings. Saturate concrete sub-base with clean water several hours before placing the setting bed. Remove surface water about one hour before placing the setting bed. Spread and screed the setting bed to a uniform thickness at sub-grade elevations required for accurate setting of stone paving to finish grades indicated. Mix and place only that amount that can be covered with stone prior to the initial set. Cut back, level edge and remove and discard mortar that has reached initial set prior to placing stones. Wet stones thoroughly before setting. Set pavers in patterns as directed by the Engineer. Pavers are to be laid symmetrically about centre line as directed. Provide no larger than 6mm grout joints between pavers. Set stones before initial set of mortar bed occurs. Do not set stone on a dry bed. Apply 1.6mm thick slurry bond coat to bed or back of stone with a flat trowel just prior to placing stones on green or wet setting bed. Pound pavers into place with a heavy rubber mallet to obtain full contact and adhesion with the setting bed. Do not disturb pavers after setting. Remove and relay pavers that must be adjusted. 23.5.5.3 Tolerance Allowable installed tolerance:
±3mm in 3m. No ponding of water will be permitted.
Stone edge to edge alignment:
±8mm in any direction.
Face width of joints:
±0.6mm in any location
Mix, install and cure grout in strict compliance with the mortar/grout manufacturer’s instructions and recommendations. Any colouring agent added to the grout shall be to the approval of the Engineer. 23.5.5.4 Expansion and Control Joints Provide 9.5mm wide sealant filled joints in compliance with the relevant specification section. Provide sealant filled expansion joints over all cracks and joints in concrete sub-slabs, over all changes in backing materials, where stone abuts a restraining surface such as walls, columns, planters and dissimilar walking surfaces, all to the Engineer’s approval. Grout joints as soon as possible after initial set of the setting bed. Force grout into joints, taking care not to smear grout on adjoining exposed stone surfaces. After grout initially sets, tool the joints slightly concave. Cure grout by maintaining in damp condition for 7 days except as otherwise indicated by latex additive manufacturer. Pointing shall be flush unless otherwise specified. Traffic shall be prohibited on paving and steps during setting or within 24 hours after initial grouting of joints.
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23.5.6 Repair and Cleaning Remove and replace loose, chipped or broken pavers. Clean exposed surfaces using materials and methods recommended by the pavers manufacturer. Remove and replace work that cannot be successfully cleaned. 23.5.7 Sealant Paving surfaces are to be treated with 2No coats of proprietary sealant applied in accordance with the manufacturer’s instructions. 23.5.8 Protection of Paving The Contractor shall include in his rates for paving, adequately protecting all surfaces to the satisfaction of the Engineer until the time of Substantial Completion of the Works.
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136
Flood Gates
24.1 Scope This Specification covers the requirements for supply and installations of flood gates.
24.2 General 24.2.1 Related References A. ASTM A 36 - Standard Specification for Carbon Structural Steel. B.
ASTM A 167 - Standard Specification for Stainless and HeatResisting Chromium-Nickel Steel Plate, Sheet, and Strip.
C.
ASTM A 276 - Standard Specification for Stainless Steel Bars and Shapes.
D.
ASTM B 26 - Standard Specification for Aluminum-Alloy Sand Castings.
E.
ASTM B 209 - Standard Specification for Aluminum and AluminumAlloy Sheet and Plate.
F.
ASTM B 211 - Standard Specification for Aluminum and AluminumAlloy Bar, Rod, and Wire.
G.
ASTM A 500 - Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes.
H.
AISI CL 304 - American Iron and Steel Institute.
I.
Aluminum Association - Specification for Aluminum Structures, 7th Edition.
J.
ASME Structural Welding Code Section IX.
K.
FEMA #114 - Engineering Principles and Practices of Retrofitting Flood-Prone Residential Structures.
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L.
FEMA Technical Bulletin 3-93 - Non-Residential Flood Proofing.
M.
SEI/ASCE 7-02 - Minimum Design Loads for Buildings and Other Structures.
N.
AWS D1.1 - Structural Welding Code - Steel.
O.
AWS D1.2 - Structural Welding Code - Aluminium.
P.
Aluminium Structures - A Guide to Their Specifications and Design.
Q.
U.S. Army Corps of Engineers, EP 1165-2-314 - Flood Proofing Regulations, 15 December 1995.
24.2.2 Design/Performance Requirements A. Design watertight doors to perform under hydrostatic loads (and hydrodynamic or other loads as specified) to control short-term load pressures indicated. All water pressure loads and operating loads are transferred to the building structure. B. Standard loading: Standard Flood Barriers are designed for hydrostatic loading, and have no additional allowances included for hydrodynamic loads, wave loads or debris impact loads. C. Special loading: Design Flood Barriers for hydrodynamic loads, wave loads, debris impact loads, or other uniform loads as indicated. D. Design Safety Factor for all watertight door Flood Barrier Models of a minimum 2:1. Based on material ultimate yield strengths. E. Design Safety Factor for Anchors, minimum of 4:1 for cast-in-place concrete, or minimum of 6:1 for concrete masonry unit construction. 24.2.3 Submittals A.
Submit under provisions of Section 01300.
B.
[ Product Data ]: Manufacturer's data sheets on each product to be used, including:
i.
Preparation instructions and recommendations.
ii.
Storage and handling requirements and recommendations.
iii.
Installation instructions.
C.
Shop Drawings: Provide shop drawings showing layout, profiles, and product components, including anchorage, hardware, and finishes. Include dimensional plans, applicable material specifications, elevations and sections detailing mounting and connections, and load diagrams.
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D.
Calculations: Submit calculations approved by a qualified engineer, to verify the flood barrier's ability to withstand the design loading.
E.
Closeout Submittals: Provide Operation and Maintenance data to include methods for maintaining installed products, precautions against cleaning materials and methods detrimental to finishes and performance.
F.
Manufacturer's Certificates: Certify products meet or exceed specified requirements.
24.2.4 Quality Assurance A.
Manufacturer Qualifications: Manufacturer must demonstrate a minimum of five years successful experience in design and manufacture of similar flood related closures. Upon request, provide supporting evidence including list of installations, descriptions, name and method of contact.
B.
Welder Qualifications: Welders Certified in accordance with American Welding Society Procedures: AWS-1-GMAW-S, WPS No. B2.004.90 for applicable material used in production of specified product.
24.2.5 Delivery, Storage, and Handling A. Store products in manufacturer's unopened packaging container with identification labels intact until ready for installation. B. Protect materials from exposure to moisture. C. Store materials in a dry, warm, ventilated weathertight location. If outdoor storage is required, block materials to store at an incline, to prevent pooling of any moisture and promote runoff. Tarp materials in a tent-like arrangement, elevated above the product with open sides to allow airflow. Store all other hardware in a dry controlled environment. D. Use caution when unloading and handling product to avoid bending, denting, crushing, or other damage to the product. When using forklifts, use forks of proper length to fully support product being moved. Consult shop drawings or consult with factory for proper lift points. 24.2.6 Project Conditions A.
Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
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24.2.7 Coordination A.
Coordinate Work with other operations and installation of adjacent materials to avoid damage.
24.3 Products 24.3.1 Manufacturers A.
B. C. D.
Acceptable Manufacturer: PS DOORS, located at: 1150 S. 48th Street, Grand Forks, ND 58201; Toll Free Tel: 800-284-0623; Tel: 701-7464519; Fax: 701-746-8340; Email:
[email protected]; Web: www.flooddoors.com Substitutions: Not permitted. Requests for substitutions will be considered in accordance with provisions of Section 01600. Obtain all watertight doors and flood barriers assemblies from single manufacturer.
24.3.2 Equipment 2.2 Watertight Doors: Provide the following doors: A.
Horizontal Sliding Flood Barrier 6.0m wide and 2.5m high: PS Doors Model HS-560.
B.
Horizontal Sliding Flood Barrier 1.0m wide and 2.5m high
2.3
Products Details:
A.
Sealing Requirements: Flood Barrier and gasket design shall provide an effective barrier against short-term high water situations, to the protection level indicated on Drawings.
B.
Operation: Provide with latching operable from one side only (typical).
C.
Mounting/Load Transfer: Anchor to existing structure. Flood Barrier designed for specified hydrostatic pressure (and other loads as specified) and will transfer loads to adjacent structure.
D.
Frames to be cast-in-place or anchored utilizing mechanical, chemical or other anchor types as designed. Manufacturer to include all anchors, water-stop, and sealants, as designed.
E.
Loading Direction Selection: (1) Standard: Positive Pressure Loading: (Direction of loading against
flood barrier so as to further compress gaskets against flood barrier frame-"seating").
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(2) Optional: Reverse Pressure Loading: (Direction of loading against
flood barrier so as to force the flood barrier away from the flood barrier frame-"unseating"). F.
Provide rectangular door opening with square corners to facilitate easy passage.
G.
Provide compression gasket which requires no inflation.
24.3.3 Materials 24.3.3.1Flood Barrier: A. Steel: Structural or formed steel shapes conforming to ASTM A 36; tubing conforming to ASTM A 500 Grade B, ASTM A 513; bars conforming to ASTM A 36, M1020; of appropriate size and strength with welded construction. B. Stainless Steel: Stainless steel conforming to ASTM A 276. C. Aluminum: 6063 alloy conforming to ASTM B 211. Panel Sheeting: Flood Barrier to be sheeted with steel sheeting or plate, Commercial Quality-Low Carbon ASTM-A-569, ASTM-A-366, ASTMA-36 welded in place. Optional 1) Steel: Commercial Quality-Low Carbon steel conforming to ASTM A 569, ASTM A 366, ASTM A 36; of appropriate size and strength with welded construction. 2) Stainless Steel: Stainless steel conforming to ASTM A 167, 304 or 316 alloy. 3) Aluminum: 6063 alloy conforming to ASTM B 209 D.
E.
G.
H.
Gaskets to be factory mounted to flood barrier assembly. Gaskets to be compressible rubber type, typically EPDM unless otherwise noted, and to be field replaceable. Frame to include jamb and sill members for field locating and installation on structure. Jamb members to be designed and fabricated with appropriate material as required for the loading. 1) Steel: Structural or formed steel shapes conforming to ASTM A 36 of appropriate size and strength with welded construction. 2) Stainless Steel: Stainless steel conforming to ASTM A 167 using 304 or 316 alloy. 3) Aluminum: 6063 alloy conforming to ASTM B 26. 4) Aluminum: 6061 alloy ASTM B 209. Threshold: 1) Stainless Steel: Stainless steel conforming to ASTM A 276, 304 or 316 alloy. 2) Aluminum: 6063 alloy conforming to ASTM B 26. 3) Aluminum: 6061 alloy ASTM B 209. Frame Mounting Hardware: Provide anchors, sealant, and water stop, as required.
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I.
Operating Hardware: Provide hardware sized for the size and weight of the flood barrier and loads. Hardware to be factory located on jambs and barrier panels, as practical. All loads are transferred to building structure. Latching hardware to be as indicated on Drawings. Flood barrier panel to be factory prepared for applicable latching devices.
J.
Steel Shop Finish: Apply in accordance with manufacturer recommendations and instructions. (1)Primer: One shop coat of manufacturer's standard shop primer (S-W Kemflash Primer E61-R-26). (2)Finish: Two shop coats of Standard Industrial Enamel (S-W Industrial and Marine Coatings B54 Series)
K.
Stainless Steel and Aluminum products to be mill finish, welds are ground smooth, not polished, and are factory acid washed, neutralized and rinsed.
L.
Labeling. Each watertight door and frame will be individually identified for matched installation.
M.
Instruction Placard: Provide pictorial and written operation instruction placards on flood barrier.
24.3.3.2Fabrication A.
Fit and shop assemble items in largest practical sections, for delivery to site.
B.
Fabricate items with joints tightly fitted and secured.
C.
Supply components required for anchorage of fabrications. Fabricate anchors and related components of same material and finish as fabrication, except where specifically noted otherwise.
24.4 Execution 24.4.1 Examination A. Do not begin installation until substrates have been properly prepared. B.
If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
24.4.2 Preparation A.
Clean surfaces thoroughly prior to installation.
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B.
142
Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
24.4.3 Installation A.
Install in accordance with manufacturer's installations instructions, approved shop drawings, shipping, handling, and storage instructions, and product carton instructions for installation.
B.
Frames shall be installed level, square, plumb, and rigid.
C.
Sealants, water-stop, and grouting to be applied per product application directions and in accordance with manufacturer's instructions.
D.
Field Grouting to be completed by appropriate personnel, and in accordance with product application directions and manufacturer's instructions.
E.
Tolerances: All dimensional requirements must be in accordance with manufacturer's installation instructions and shop drawings.
F.
Field Testing: (1) Perform visual dry test for gasket alignment, continuity contact and
pre-compression. (2) Construct temporary water barrier and test installed flood barrier.
24.4.4 Field Quality Control A.
Manufacturers representative to verify that installation of assembly and that the perimeter conditions are in conformance to the manufacturer's recommendations.
B.
Products to be operated and field verified including the sealing surfaces to assure that they maintain contact at the correct sealing points.
C.
Verify that hinging and latching assemblies operate freely and correctly.
D.
Verify all anchorage is in accordance with manufacture's installation instructions and applicable data sheets.
24.4.5 Cleaning A.
Repair or replace damaged installed products or components.
B.
Clean all sealing surfaces.
C.
Touch up damaged finish.
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24.4.6 Protection A.
Protect installed products until completion of project.
B.
Touch-up, repair or replace damaged products before Substantial Completion.
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25
144
Vertical Transportation Systems
25.1 Passenger Lifts and Goods Lift The elevator(s) shall be designed, supplied, installed, tested and commissioned by a manufacturer to the Engineer’s approval. The work will be carried out concurrently with the work of the building contract and the main contractor will be required to carry out certain work in connection with the Elevator contractor. 25.1.1 General Requirements For approved manufacturer or product specifications or the relevant BS, the safety factor of 5 or greater shall be taken for all parts of the equipment. The safety factors shall be calculated on the basis of maximum imposed loads. Deviations from the requirements of the specifications may be considered but only if they are fully detailed in a letter accompanying the Tender and the difference in price between the specified article and that offered is stated with the accompanying letter. If the Tender price includes for delivery of factoryassembled cars or other equipment to the site, this should be clearly stated in a letter accompanying the Tender, together with full details of any special facilities required for their installation. The wording used on drawings, notices, labels or other marks called for in this Specification shall be in English/Arabic where indicated. The supplier has to ensure compliance in all respects with the written specifications. The supplier has to ensure prior approval for any deviations and acceptable justification for the same. Cost savings must be mentioned. The Project Engineer/Architect has the right to accept or reject any such deviations. The supplier should confirm that their offer includes all critical requirements of the Specifications which are included in the following document. A. SERVICE ELEVATOR SPECIFICATIONS
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QUANTITY
: One(1) Nos.
TYPE
: Service Elevator
CAPACITY
: 5000 KGS
SPEED
: 0.5 M/s
STOPS/ENTRANCES
: 6/6 All in line –
LANDING DENOMINATION
: B,G,1,2,3,4
DRIVE SYSTEM
:Variable Voltage Variable Frequency, Gearless with Permanent Magnet Synchronous motor with two independent for better brake system ride comfort & energy saving
CONTROL
: Simplex Full Collective
TRAVEL
: 27.4 Mts.
CAR ENCLOSURE / FINISH NO.OF OPENINGS
: One in front
CAR INSIDE AREA 2400mm H
: 2900mm W x 3000 mm D x
FRONT RETURN PANEL
: Hairline finished stainless steel
SIDE & REAR WALLS
: Hairline finished stainless steel
FLOORING
: Zinc Coated Steel tear plate
CEILING/LIGHTING
: Flat shape ceiling with fluorescent tubes White Painted sheet metal
BUFFER RAIL
:2 rows of solid lacquered wooden buffer rail on the rear and side walls
FAN
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: Roof mounted.- In blow
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CAR DOOR DOOR TYPE sliding steel door
:Automatic 4 panel centre opening
DOOR OPERATION drive System
:Variable Voltage Variable Frequency
FINISH
:Door panels stainless steel
in
hairline
SAFETIES limitater
:Light
&
Door
DOOR OPENING
: 2500mm W x 2300mm H
CAR OPERATING PANEL
: Hairline finished stainless steel –Full Height
Curtain
finish
pressure
Car operating panel shall comprise of the following: Micro movement push button in stainless steel for each floor with call accepted light Position indicators & Direction arrows (Digital) Door Open extension button DC Alarm Button Door open button Door Hold button Door close button Intercom unit Overload indicator – Audio / Visual Emergency Light Fireman Key Switch Load data LANDING DOORS DOOR TYPE
: Same as car door
DOOR OPENINGS
: Same as car door
FINISH AT GROUND FLOOR
: Door panels with Narrow Frame in hair line Finished Stainless Steel
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FINISH AT TOP FLOOR
MAP LANDING DOOR SILL
147
:Door panels, and Narrow frames in Hairline finish stainless steel : Wall mounted at Top floor : Extruded Hard Aluminium
HALL CALL PANELS HALL CALL BUTTONS
: Landing Call Station on the entrance wall
HALL INDICATORS
: Digital hall indicator above the landing doors at all floors
FACEPLATES
: Hairline finished stainless steel
MACHINE ROOM POWER SUPPLY SHAFT SIZE (Available) lift
: Not Required : 3 Phase, 415 Volts, 50 Hertz : 4200 mm W x 3500 mm D per
PIT DEPTH (Required)
:2100mm clear from FFL
OVERHEAD (Required)
: 4500 mm clear from FFL
SPECIAL FEATURES Battery Operated Emergency Landing Device – Automatic Less RPM resulting less noise, wear & tear Easy Operating Manual Rescue device- Without external power and 100% manual Advanced door opening Accurate re levelling Intercom - 3 station Car, Top floor & Ground Floor (If Ground floor unit is required in any other location, (Max distance 50 M), conduit & wiring to be carried out by others.) Emergency lighting in the car DC Alarm bell in the car Arrival Gong Firemen drive Automatic car light & fan shutoff Car Call registered Buzzer Drive time supervision Nudging etc
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To be connected to the elevator monitoring system Prevention of uncontrolled motion in up direction Two independent brake systems Manufactured in compliance with EN81 – 1; 1998
NEW GENERATION MACHINE ROOM LESS / GEARLESS ELEVATORS
Number of Units
Six (6) Nos.
Type
Passenger Elevators
Load
630 Kgs. – 08 Persons
Speed
1.0 MPS
Travel
23.2Mts. for 2 lifts and 27.4 Mts. For 4 lifts
Number of stops/openings
5/5 stops for 2 Lifts & 6/6 Stops for 4Lifts All in line
Floor Designations
B,G, 1 ,2,3,4 For 4 Lifts ( 1 set of triplex & 1 simplex) G,1,2,3,4, For 2 lifts – 2Nos. Simpex
Steel ropes
Bright steel wires formed steel ropes with suitable diameter to ensure a minimum safety factor of 12. Should be lubrication free for better safety and life - Quantity and size of the rope according to the manufacturer to meet the above safety standard.
Compact Gearless Machine
To make equipment 50% more efficient than a conventional geared machine. Machine is located at the top of hoist way, hence maintenance free, light weight with out gearbox machine is necessary for safety, reliability, less noise pollution and efficiency. 180 starts / hour must to meet the traffic in the peak hours
Number of starts per hour
Main Motor
Synchronous motor with embedded permanent magnets with radial gap. This will ensure better speed control and reliability, maintenance and lubrication free.
Brake
Disk brake, maintenance free. – 2nos.
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Motion Control
149
Closed loop-Vector Control VVVF drive system to have ultimate ride quality and leveling accuracy of ± 5 mm.
Average Noise Level in car Should be less than 55 dB(A)
Improved Design Simplicity
To reduce part count.
Controller
EPac – mistake proof controller assembly with vandal - resistant emergency and inspection controls – Duplex opertaion
Motor R P M
Should not be more than 100 to avoid wear & tear and reduce noise pollution
Motion Control
Microcomputer – AC Variable Voltage & Variable Frequency (VVVF) for ultra smooth ride comfort and 50% power saving, precise leveling accuracy.
Control System
Triplex Full collective selective control for 3 Lifts Simplex Full Collective selective control for 3 Lifts
Power supply
25 Amps, 415V, 50Hz, 3P with neutral and 10Amps, 240V, 50Hz. Single phase for each elevator.
Lift well size (Available)
1800mm (W) x 2000mm (D) – Per Lift- clear inside Note for civil work. Shaft should be plumbed without any deviation.
Overhead (Available)
4000mm between the last landings finished floor level and underside machine room floor slab.
Pit Depth
1400 mm
Elevator cabin design
Suitable for Passenger elevator
Cabin internal size
1100 MM (W) x 1400 MM (D) x 2400 mm (H)
Side panels
In Hairline Finish stainless steel
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Rear panels Hand Rails Car operating panel
150
In Hairline finish stainless steel In Hairline stainless steel finish on the rear wall In Hairline stainless steel incorporating all operating and indicating fixtures.
False ceiling & lighting
Decorative False ceiling.- Minimum of 5 type of ceilings to be submitted for the engineers approval
Car façade
In Hairline finish Stainless Steel
Car door
In Hairline finish Stainless Steel
Flooring
25mm recess for local flooring by others. Max allowed weight for the same is 200 Kgs. and if exceeded the capacity of the elevator will be reduced accordingly.
Cabin sill & landing sills
Extruded hard aluminium with slotted sills. Car and landing sill gap – 25mm for safety reason.
Door operator
Door operator with mechanical reversal switch for quick and smooth operation. 800 mm (w) x 2100 mm (h)
Clear door opening Landing doors
Centre opening type power operated automatic sliding doors in Hairline finish stainless steel. Doors shall be 2 hrs fire rated
Door frames – on all floors
Narrow Jambs in Hairline finish stainless steel.
Indicators/fixtures
At All Landings Landing call station with buttons and Hall Position and Direction indicator above the landing doors for better viewing and avoid vandalism. Buttons and face plate in Hairline finish stainless steel faceplates. LCD display with black back ground for better identification and user convenience. Micro-touch hall buttons with Self lit up & down arrows. Hairlines finish stainless steel
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faceplates. Cabin indicator
Built in latest high quality liquid crystal display with black back ground with Direction Arrows and it will be a part of the car-operating panel to facilitate better view of the position of the car.
Car chime
On the car roof. Automatic Car Return: When there are no further car or hall calls, the car will return and automatically park at a specified landing. Cut off Hall Call Switch: When activated this feature disables all hall calla, but allows the normal operation of car calls. When the car has no further demand, it parks with its doors opened at the last landing served. Load Non - stop: When a car is loaded to a pre-determined percentage of capacity, weight sensing devices are activated, causing the car to by pass further hall calls. Remote Monitoring System All the elevators should be connected to the elevator monitoring system kept in the maintenance room. The system should be capable of displaying the real time view of equipment status (Movement; location; door operation etc). Traffic History play back like availability; down time & generate reports about equipment performance, availability and operational quality. Should be able to call and commands to be issued to the elevators like locking of calls etc. The system, programming etc has to be supplied and installed by the elevator contractor Car position Indicator: This feature displays car position, running
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direction, fire service and overload signals. Extra Door Time: This feature extends the length of time the doors Remain open. Emergency light: Emergency lighting in the car with trickle charger unit with battery back up. Communication: 3- Way communication. In car, top landing near the control panel and care takers room (max. wire length 250 mts cabling by main contractor) Door time protection: When the doors fails to open or close, the elevator will remove itself from the group control, retry to open or close its doors and sound the buzzer in the car. After three unsuccessful attempts, the car will be shut down. Door protection: A full wall height electronic curtain will be fixed between doors which monitors passengers boarding or existing to control opening/closing time of the doors most suitably and ensure automatic door reversing (touch less). Door Pressure Limiter The door will reopen when ever it exceeds the pre- programmed force while closing. Door Speed It should have minimum of 3 level of speed to be programmed at site according to the requirement of the client and should be with variable voltage variable frequency drive
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system for quieter and smooth operation. Door time protection: When the doors fails to open or close, the elevator will remove itself from the group control, retry to open or close its doors and sound the buzzer in the car. After three unsuccessful attempts, the car will be shut down. Anti-Nuisance Car Call Protection: When the weight of passengers in the car is not more than 10% of rated car duty, and four or more car calls are registered, all car calls are cancelled automatically. Car Call Cancellation: When a car call button is incorrectly selected, it can be cancelled by pressing twice on the same button. Nudging: If the doors are prevented from closing for a fixed period of time, a buzzer sounds and the doors begin to close at a reduced speed. Automatic Bypass (ABP) If a car becomes near full capacity, the elevator will automatically bypass all the hall calls along the service direction, responding to the car calls only. Suitability for handicapped persons: All elevators are suitable for handicapped persons. Height of landing & car buttons are suitable for handicapped as per CEN code of practice. Car Ventilation Blowing fan to ventilate the car.
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Fireman emergency operation. Elevator will have fireman switch at the main landing with switch. On activating the switch, the elevator will automatically cancel all the landing calls and will immediately respond and reach the main landing and remain there to ensure access to fireman people. Manual rescue operation 100 % manual rescue should be used to avoid external source of power supply etc for safety INCASE OF EMERGENCY Alarm bell: By pressing the alarm bell in the car, a DC alarm bell starts ringing to give an alarm signal. Reopen with hall button: While the doors are closing, pressing the hall call button can reopen them. Repeat door close: Should an obstacle prevent the doors from closing the doors will repeatedly open and close for a limited period of time for the safety of the equipment. Automatic Rescue Device: Battery operated emergency landing device will be provided to bring the elevator automatically to the nearest landing with continuous drive motion for safety in case of power failure and doors open for rescue of passengers. Safety Power Consumption
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Gradual type 3.7 KW Motor; 3,000 Kwh/a for 200000 Starts
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Buffers
Standard
Guide rails
Steel tee sections.
Other features
• • •
• •
• • • • • •
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Automatic Circuit Breaker Anti nuisance car call protection Electromagnetic interference filter (high frequency) to comply with EN 12015 (emission) and EN12016 (immunity) Manual main circuit breaker E&I panel at top landing can be located in the front wall /rear wall / side wall according to the requirement of the engineer. Door open & close button Delayed drive protection Reverse phase relay Over speed governor Re-leveling Scrolling display at all landings and inside the cabin to display the status of the elevator in case of overload; Full load; fireman drive; out of service etc
25.1.2 Builders Work and Attendance The main contractor shall allow for all builders’ work in connection with the elevator installation as per requirements of the Elevator contractor listed in this schedule. The main contractor shall also provide normal attendance including all usual facilities for the execution of the Elevator contractor. A clear list of builder’s works and exclusions are to be submitted with the original offer by the Local Agent. The lift contractor shall supply all necessary fixings, inserts and bolts for building in to the lift shaft structure. Steel beams for lifting tackle or for the fixing of guides in a common lift well should be supplied and fixed by others to details provided by the lift contractor. The lift contractor shall drill in this steelwork the holes required for supporting or securing his equipment. Unless otherwise indicated, the lift contractor shall supply and fix any steel angles he requires to support the landing door frames and sills. Where inter well pit screens are required, they shall be supplied and fixed by others. Counterweight screens and guards shall be provided and fixed by the lift contractor.
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All other builder’s work associated with the lift installation shall be by the lift contractor. 25.1.3 Services to be provided by the Main Contractor Unless agreed otherwise, the following works are deemed to be included in the Main Contractor’s Scope of Works. • • • • •
•
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•
• • • • •
Required data for the performance of the Contract. A properly framed, plumbed and enclosed elevator hoist way including, if required, any extension of such above the roof level. A hook should be provided at the centre of the lift well in the roof slab. An air conditioner of approved type shall be provided inside the lift shaft near the top landing. An elevator pit shall be provided in the lift shaft below the bottom landing. The pit shall be waterproofed and provided with a drain or sump (if required) and an approved access ladder. The hoist way shall be designed and constructed to meet the reaction loads and forces, as furnished by the elevator supplier, resulting from the use of the elevator. The Main Contractor shall do all cutting or painting of walls, floors or partitions together with any repairs made necessary thereby. The Main Contractor shall install power, signal and light connections as follows: o A 3-phase 415V 50Hz (kVA rating as per approved drawing) AC power supply with isolator for each elevator, at the top floor near the operating panel. o A single phase 240V 50Hz AC auxiliary power supply with isolator for each elevator near the operating panel for hoist way lights, with one light at each floor level and one at pit level o A 15A 240V single phase 50Hz power supply, complete with isolator switch, at the top floor near the operating panel for light and fan installation within the elevator car. The Main Contractor shall furnish and erect shaft scaffolding with a safe working platform and other temporary civil works as required for the execution of the project. The scaffolding shall be dismantled and removed in conjunction with the elevator contractor’s agreed installation programme. To supply and fix, cut-outs, circuit breakers, lightning arrestors or other devices that are required to meet local requirements. To provide temporary power of the necessary characteristics during the erection of the elevator for lighting, tools and hoists. To provide temporary power as required for testing and adjusting the elevator when required. To provide suitable protection to the hoist way at all times during construction. To provide a safe storage room and material handling facility at the site.
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•
To provide and fix any heat insulation materials on the hoist way slab and adequate ventilation for maintaining the temperature inside the lobby and shaft within 40ºC.
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Related builder's works of the elevator shaft Permanent 3 PH 415V 50HZ TPN with circuit breakers of required capacity etc. in the top floor inside the elevator shaft. – To be connected to the elevator controller by the lift supplier Shaft hoisting hooks in the elevator roof slab. Provision of conduits with draw wire between elevator shaft and security/reception for elevator interphone Sufficient lockable covered storage accommodation to store the elevator materials at ground floor near elevator shaft till the completion of installation The building carnage facility should be extended to the elevator contractor incase of reqmnt.3-phase power supply with the capacity and characteristics of the final power for installation and testing purpose at the top floor of the lift shaft.
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Separator beams in between the two lifts if there is no middle wall Elevator shaft lighting Marble/granite flooring to the elevator with the approved color and finish All finish work after the installation of elevators. Necessary insurance for the materials during storage, installation and till handing over Wire mesh partition in the pit level- Pit bottom to bottom most floor level – In between the elevators for the combined shaft Draw wire between the building fire system and elevator control to incorporate the building fire system to the elevator control Necessary cabling for the elevator monitoring system – Connection between the elevator controller and the elevator monitoring system
25.1.4 As-Built Drawings and Service Manuals On completion of the elevator installation and at least one-week prior to the date of inspection, the elevator contractor shall hand over to the Engineer, as built elevator installation drawings. The drawings shall be duly approved and give dimensions, critical clearances, load reactions and civil work finishes. As built wiring diagrams shall be provided upon completion of wiring testing and commissioning. Two sets of Operation and Maintenance manuals are to be supplied for general running, maintenance and repair together with specific equipment supplier documents.
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25.1.5 Relevant Codes and Standards The minimum standards for products specified in this section shall be as referred to in the following Codes: • EN-81:1998 – Safety rules for the construction & installation of lifts. • BS 5655: Lifts and Service Lifts • ISO 9001-2000: Standards (for local agency) for supply, installation, testing and commissioning of elevators. The Elevator contractor shall design, supply, install, test, commission and hand over the complete elevator installation as specified and in accordance with the latest regulations EN-81; 1998. The contractor shall specifically confirm full compliance to the following EU Directives: •
95/16/EC – mandatory from 01.07.1999, Prevention of uncontrolled elevator motion up and overloading, improving accessibility for the disabled and providing means of permanent communication with rescue service
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89/336/EEC – mandatory on electromagnetic compatibility, covering elevator equipment radiation and immunity aspects
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89/106/EEC – voluntary, recommendation on construction products to improve energy efficiency, environmental aspects and safety of use, and to reduce noise, vibrations and fire risks
The particular specifications of the elevators are given at the end of this schedule. The Elevator contractor shall commence the electrical installation from the isolators (one per elevator) provided for this purpose. All these shall be coordinated with the other contractors prior to installation, so that there will be no areas of incompatibility. The elevators shall be equipped with traction machinery and associated traction equipment, elevator cars, micro computer control systems and all other equipment and accessories required to provide a complete, modern, durable and efficient vertical transport system. All the electrical equipment shall be compatible with the available electrical system of the building, as specified under electrical section. All the components shall be selected to provide satisfactory operation under prevailing environmental conditions at site. The elevator contractor shall be responsible for the complete maintenance of the elevators for a period of 12 months from the date of acceptance by the Engineer of the completed elevator installation and shall include for cleaning, oiling and inspection of the elevators and all the associated equipment at period of one month and to include for all emergency calls throughout the 24 hours of the day due to the failure of the elevator to operate normally.
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A monthly inspection sheet shall be submitted to the Engineer immediately after each monthly inspection and cleaning and greasing. The contractor shall also give confirmation that any fault notified will receive immediate attention on the day of the notification. 25.1.6 Test Certificate Safety and type test certificates from the supplier shall be provided for items used in the equipment. 25.1.7 Capacity Each elevator shall have a safe carrying load as specified, exclusive of weight of complete car, cables, ropes and other accessories. 25.1.8 Lift Machines All elevators are to be of the latest machine room less technology with a compact machine installed inside the hoist way with a steel rope or coated steel belt for smooth operation. There should be a factor of safety of at least 12:1 for passenger elevators. The lift machine shall be complete gearless type. All components comprising the lift machine shall be mounted on a steelwork assembly supported on vibration insulators above the front and rear wall of the shaft. They shall be mounted and assembled so that proper alignment of the component parts is maintained under all conditions. The machine shall run with minimum noise and vibration and the braking arrangement shall bring the car to rest smoothly under all conditions of loading. Shaft axils shall be provided with adequate fillets where shouldered. All bearings shall be quiet running and renewable with adequate provision against oil leakage. 25.1.9 Lift Motor The lift motors shall run with minimum noise and vibration. Their characteristic and their controlling device shall provide smooth acceleration and deceleration, together with a short levelling distance, as approved to the type specified. The lift motor shall be capable of continuous duty cycle of 180 starts per hour and shall have the same rating at car top control speed. Equipment shall be provided with thermal overload device in the main motor which shall operate in the event that the motor temperature exceeds 55ºC.
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25.1.10 Levelling, acceleration and deceleration The stopping/levelling accuracy of the elevator car during normal operation with or without load condition in up or down direction shall be within ± 25.1.11 Electrical Supply The electrical supply shall be 415V/3-Phase/50Hz. The product supplied shall function satisfactorily at the declared voltage ±10%. The lift contractor’s electrical installation shall commence from a main switch provided by others as per the location specified in the General Arrangement drawing for which the lift contractor shall recommend the current rating and minimum protection requirements. The circuit for the car lighting etc, shall be fed from a separate switch provided by others and fused at a current rating recommended by the lift contractor. 25.1.12 Phase failure Motors connected to a 3-phase supply shall have phase failure protection to prevent operation in the event of a single phase failure or reversal of building power. 25.1.13 Speed The rated speed of the elevators shall be as specified in the schedule. 25.1.14 Solid state control and drive technology The elevators shall be equipped with variable voltage and variable frequency (VVVF) control gearless motor as specified in the schedule. The motor shall be permanent magnet embedded synchronous type with vector controlled drive technology. The design shall be compact and capable of being installed in the shaft and having step-less, smooth speed time characteristics. Elevator Operating & Controlling System The Group Control:25.1.15
The elevators shall operate as one group controlled by a supervisory system, which automatically detects the prevailing traffic pattern and regulates movement of cars according to the best service strategy at any moment or as Simplex if specified in the particular specifications. The elevator and group controls shall be microcomputer-based, programmed in a high level language. The group control software shall be located in each elevator controller, with every elevator control computer being able to assume the system leadership. The data transfer between the computers shall be realized with high-speed, disturbance-resistant serial link. Preferably LON technology shall be used to ensure high data integrity and reliability. ‘Up’ and ‘Down’ directional landing call push buttons are to be provided at each intermediate landing served by the bank, together with push button only to be provided at terminal landings. Landing calls are to be connected to the
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elevator controllers so that failure of one elevator or group control computer does not prevent the registering of landing calls and their normal service by the remaining elevators. All elevators in group that may assume leadership, shall be connected to all landing calls. ‘Up’ and ‘Down’ directional hall lanterns are to be provided at each landing served by the bank, together with an electronic acoustic arrival signal. ‘Up’ and ‘Down’ lantern only is to be provided at terminal landings. In each car, a car control station is to be provided. The station shall contain a push button for each floor served with `call registered' illuminated signal marked with appropriate floor designations, as well as an Alarm push button, a Door open and Door close push button. The control system shall collect statistics on elevator operation, including number of starts, number of calls, their waiting time distributions, and log of fault situations. An access port shall be provided on the elevator controllers to enable viewing all these data. A basic set of data necessary for routine maintenance shall be visible on a built-in maintenance interface. The system shall be prepared for connection through a serial link to a computerized elevator monitoring and command system, through which all the aforementioned data can be accessed. Control shall be Direction Selective-Collective and programmed for multiple car operation. The first car to fall idle shall become the ‘home’ car and shall automatically arrive at the main floor with its door closed. If both cars are idle at the main floor then the last car to arrive takes over as the ‘home’ car. Whilst there is a ‘home’ car, the other car shall be ‘free’ and shall function as directional collective control for one car except that it shall not answer: • •
A call from the Main Floor A call below the Main Floor
The ‘home’ car shall come into operation if: A call is made on its own car call buttons An ‘up’ call is made from a landing below a ‘free’ car whilst it is travelling up. An ‘up’ or ‘down’ call is made from a landing above the ‘free’ car whilst it is travelling downwards. The ‘free’ car is fully loaded or unable to answer within a pre-set period, all the calls which it is assigned. Only one car shall answer any one landing call. If a lift fails to start or is taken out of normal service, e.g. Car Preference or car top control, the other lift shall function as directional collective control for the one car. 25.1.16 Push Button and Signal Panels Push button and signal panels shall be finished in hairline stainless steel unless specified otherwise. The floor designations and other markings shall be
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approved by the Architect/Engineer and shall be bold and durable. Any abbreviations shall be clear and non ambiguous. Arabic script shall be approved by the Engineer. The following features shall be applicable: All car and landing push buttons for passenger’s normal use shall be located between 900mm and 1400mm from finished floor level • Push buttons shall be micro-touch with self-lit type within stainless steel. • Routine maintenance and lamp replacement shall not involve disturbing any wiring which is not truly flexible and properly anchored. • The rated voltage of indicator lamps shall be at least 10% greater than the normal voltage of the supply to which the lamp is connected. • Illuminated indicators with 16-segment display shall be provided in addition to those specified in other parts of the specification. • Car Operating Panel (COP) and landing displays shall comprise segmental (at least 16 segments) indicators showing position and direction arrow. • Displays shall be large in size and shall indicate: • Every landing on the side of door combined 16-segment digital Hall position and direction indicators for better use convenience. • Within cabins and at top of COP, combined 16-segment digital Hall position and direction indicators. • The COP shall contain the items listed below: o Full set of car buttons (one per landing) o “Open Door” button o “Close Door” button o “Alarm/Intercom” button o Key operated switch to change from automatic to car preference option. Where a directional collective control system is specified, the push buttons in the car shall remain illuminated to indicate outstanding car calls. •
25.1.17 Landing Push Button Panels One call button shall be provided at each of the terminal landings and one up and down call button shall be provided at each of the intermediate landings. The panels shall include a signal light for each button to indicate when a call has been registered and will be answered. Push buttons shall be micro-touch or capacitor type with self-lit buttons in stainless steel casing and where indicated an illuminated arrow to indicate direction selected. Panels shall have complete hairline stainless steel finish to face plate
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25.1.18 Car Call Cancellation When a car responds to the final car call in the up or down direction, all registered car calls should be automatically cancelled to increase traffic efficiency. After cancellation, a new car call registration is possible. 25.1.19 Automatic Bypass If a car becomes near full capacity, the elevator shall automatically bypass all the hall calls along the service direction and respond to car calls only. 25.1.20 Next Landing Facility If an elevator door becomes jammed for some reason and passengers are unable to get off at the desired floor, the elevator shall automatically proceed to the next floor with functioning doors with all safety devices intact. 25.1.21 Safe Landing with Main Power Supply Uninterrupted To be designed to prevent passengers from being stranded in the car when an elevator malfunctions and stops between floors. The source of the malfunction has to be automatically determined and when elevator operation is determined to be safe, the car shall proceed to the nearest safe landing at reduced speed and on arrival the doors shall open with all safety devices intact. 25.1.22 Hoisting Ropes/Belts Hoisting Ropes shall be made of bright steel wire with fibre cores of adequate cross-section, manufactured to BS EN81 and BS302:Part 4, or steel wire ropes with adequate cross-section, manufactured to EN81, fixed with spring loaded rope tension equalizer with a slack rope switch. A better proposal of suspension with coated steel belts instead of steel ropes shall also be provided. 25.1.23 Governor Ropes These shall be manufactured similar to hoisting ropes. The two ends shall be securely linked to the car and attached to the safety gear-operating lever. A weight-loaded device located in the pit shall tension the governor ropes. At least three suspension ropes/belts shall be provided for the main suspension. Lift installer shall provide copies of manufacturers test certificates for the rope and belts. The lift installer shall ensure that the car rope/belt anchorages permit equalization and tension. A data plate shall be fixed to the top member of the car sling near to the suspension rope anchorage in a conspicuous position giving the following information: • • •
The maximum static load on the belt in kg. The rated load and speed in kg and m/sec. A description of the suspension rope/belt construction.
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The suspension rope/belt anchorage devices at both ends shall permit and indicate equalization of tension (e.g. long screwed shank eyebolts and matched sets of compression springs.) 25.1.24 Counterweight Cast iron blocks and guide shoes shall be enclosed in a steel framework to balance the weight of the car and 50% of the specified capacity. The filler weights shall be contained and secured within the steel frame. The counter weight shall withstand the effect of buffer impact without permanent deformation. 25.1.25 Guide Shoes The car sling and counter weight frame shall incorporate heavy pattern adjustable sliding guide shoes fitted with renewable linings of durable nonferrous material. For lift speeds exceeding 1.0m/sec the guide shoes shall also be spring-loaded and self aligning. Any necessary lubrication shall be applied by automatic means. 25.1.26 Buffers All necessary support and mounting of the buffers shall be provided, including any steel stools, columns or stands to support the buffers at the appropriate height above the pit floor.
Energy accumulation type buffers shall be of the helical spring type and have a constant spring rate. Polyurethane buffers for speeds up to 1.00mps and oil buffers for speed 1.60mps and above shall be fitted in the hoist-way pit beneath both car and the counterweight. These shall be securely mounted on continuous RS channels RS channels and correctly disposed relative to the car and the counterweight. Oil buffers shall be used when the rated speed of the lift exceeds 1.0m/sec. The buffers shall have been tested in accordance with BS EN 81-1 and bear the type approval mark. Oil buffer plungers shall be of mild steel, accurately machined and designed to provide required retardation rates. A toughened rubber bumper shall be fitted to the top of the plunger to withstand the impact of the steel buffer plates mounted on the underside of the car and the counterweight. The buffers shall be so constructed as to contain any oil or hydraulic fluid displaced during operation. The buffers shall be permanently and legibly marked to indicate the type and quantity of oil to be used. An oil gauge shall be provided to check the oil level.
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25.1.27 Travelling Cables The travelling cables shall be 450V/750V grade multi-core with stranded high conductivity copper conductors, especially designed for lift duty, and manufactured to EN81. Retaining straps and individual cable lamps shall properly support these cables. Provision for plug in connections shall be given. 25.1.28 Safety Equipment Safety gear shall have been type tested in accordance with BS EN 81-1 and shall bear the type approval mark. The safety gear shall be compatible with the over speed governor. The car safety gear shall be attached to the bottom/top member of the car sling. Where counterweight safety gear is provided, it shall be fitted to the underside of the counterweight frame. The gradual or instantaneous type safety system depending on the speed of the elevator comprising of a close loop roping system, over-speed centrifugal governor, safety gear equipment, etc. shall be provided. In case of gradual type the operation of the system shall be such that if the car overspeeds in the downward direction the governor jaws shall trip, operating the safety gear. It shall, in sequence, out of the motor power supply, apply a constant retarding force to bring the car to a gradual and smooth stop within defined limits. Re-setting of the safety devices shall be possible by moving the car in upward direction. The complete system shall comply with the relevant Sections of EN-81; 1998. 25.1.29 Over Travel – Final Limit Switches Over travel limit switches shall be provided at the top and bottom of the terminal landings, to disconnect the power supply and apply brakes to bring the car to safe stop position in the event of an over travel in either direction. Operation of the final limit switches and any well mounted terminal stopping switches shall be effected directly by the car at the top and bottom of the well. The switches shall be securely fixed and in a manner that normal horizontal movement (float) of the car shall not affect their operation. 25.1.30 Evacuation Devices and Fireman’s Control Provision shall be made to move the car automatically and / or manually from the controller/Maintenance access panel, to a nearest landing in either direction (depending on load conditions) to facilitate evacuation of passengers during the power failure. The machine shall also be provided with a manual means of operation whereby the car can be moved to a landing by manual operation by switches provided in EI or operating panel located either in top or bottom floor entrance.
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Where specified on the fire strategy drawings, a fireman’s control shall be provided for the designated lift(s). Unless specified otherwise, the fire switch shall be of the tumbler type, fitted in a flush-mounted box with a glass cover. All lifts shall be configured to home to a designated landing in the event of the fireman switch being operated. An escape hatch shall be provided in the roof of each cabin 25.1.31 Elevator Car The size of the car, interior design and decorations, ceiling and lighting and other facilities shall be as called for in the Schedule. The car shall be of rigid steel framework, with sound isolation, designed and manufactured all in accordance with relevant Sections of EN-81; 1998. The tender price shall allow for the car to be finished internally with delivered materials as specified and for subsequent fit-out to an agreed weight by specialists if required. The lift car walls, floor and roof shall be made of non-combustible materials with the exception that: Slow burning materials may be used if all outside surfaces of such materials forming part of the enclosure and platform are covered with sheet steel not less than 0.5mm thick. All surfaces within the car enclosure shall have a surface spread of flame not inferior to Class2 of BS476:Part 1. The car enclosure shall be resiliently secured to the car sling. The car platform shall be resiliently secured to the car sling. The operating buttons and keys shall be as given in the relevant Section of the Specification. 25.1.32 Suitability for Handicapped Persons All elevators must be suitable for handicapped persons including blind persons. Buttons should have Braille text and numbers as required and the height of the landing and car call buttons should be suitable for handicapped persons as per EN Code of Practice. 25.1.33 Car Sling The car enclosure shall be carried on a separate steel sling. When supporting the rated load, evenly distributed over its platform, the sling shall have sufficient mechanical strength to withstand safety gear or buffer operations without permanent deformation. The car sling shall incorporate at least four guide shoes, two at the top and two at the bottom of the car sling.
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25.1.34 Ventilation An electric fan mounted on the car roof with vents according to EN81-1; 1998. Provide an extractor fan in the roof of the car operated automatically through a battery supply complete with transformer and rectifier. The battery shall provide continuous operation of the fan for a minimum of 30min. 25.1.35 Lighting and Emergency Lighting The interior lighting of the car shall be by at least 2No mains operated fluorescent lamps, suitably enclosed and each operated by separate control gear. The total Illuminance at floor level shall be in the order of 200lux and is to be specified by the lift supplier. For Service Lifts the interior lighting shall be provided with protection against mechanical damage. The car light switch shall be located in the car under a lockable panel in the COP and marked “Car Light”. Lift lighting shall automatically extinguish when has not been used for 5 minutes. In addition to the normal mains lighting self-contained a maintenance-free emergency light shall be installed complete with a trickle charger and battery. Minimum operation time shall be 1 hour. The installation shall be in accordance with BS5255:Part 1. The lighting shall be energized automatically following the failure of the main supply to the normal lighting. The lamps for the emergency lighting shall be located and rated such that, in addition to giving some general Illuminance of at least 0.5lux over the front of the car to distinguish the car threshold, they should also distinguish the telephone cabinet and the alarm button. If incandescent lamps are used at least 2No lamps of equal wattage shall be provided and connected in parallel. The battery for the emergency lighting shall have sufficient capacity to maintain the simultaneous operation of the emergency lighting for at least half an hour and the emergency signal for at least one hour. The emergency lighting unit shall be fed from the live side of the car light switch. It shall automatically recharge the battery upon restoration of the normal mains supply after being discharged. The battery shall within a 14 hour period be capable of again meeting the power supply requirement. At the end of the specified discharge period, the battery shall provide not less than 85% of its normal voltage at 15ºC with the normal load connected.
25.1.36 Working Platform A working platform, complying with EN-81; 1998 shall be provided on the roof of the car.
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25.1.37 Fascia Plates Where the landing thresholds are designed to project into the lift well, sheet fascia plates at least 100mm wider than the clear door opening (symmetrically located) shall be provided between the undersides of each track or sill and the top door supporting frame below. A steel ramped apron shall be provided below the lowest track or sill. 25.1.38 Car and Landing Doors The car and landing doors shall be fully automatic, centre / side opening, sliding doors as specified in the schedule. The finish of the doors shall be stainless steel with hairline finish as per the size detailed elsewhere in this specification and shall comply in all respects with BS EN 81. Opening of the landing doors manually shall shut down the equipment and a manual resetting shall be required to restart the equipment for safety reasons. 25.1.39 Sill, Guards, Door Suspension Each door shall be complete with a combined track and sill in cast aluminium alloy or in stainless steel on a supporting steel frame. Each panel should have a two-point adjustable suspension element and robust anti-tilting device. They shall run on wheels fitted with sealed bearings that shall be easily renewable from the cabin top, Guide shoes shall be fitted at the bottom of the door panels to prevent twisting during operation. 25.1.40 Door Operation Closed loop door operation Car and landing doors shall be automatically operated with VVVF digital closed loop door operator either with belt drive or direct coupled rope driven micro-processor controlled mechanism with encoder for smooth movement and minimum noise. Doors shall be provided with the following safety features: Door load detector. When an object is caught in opening/closing mode the doors will reverse direction when an excess load is detected. This function shall ensure maximum safety to users. Door protection. A door protection 2D electronic curtain up to full height of the door shall be fixed between doors which shall monitor passenger and goods loading in the elevators and re-open the doors if there is any obstacle in the doorway. Door nudging feature In the event of any door safety device malfunction, a temporary override function is to be automatically engaged to close the doors, thereby preventing a
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fault in elevator operation. Once the doors have closed completely the override has to be cleared and normal operation resumes. Advance door opening: During normal operation the opening movement of elevator doors shall start in the levelling zone and be substantially complete in operation by the time the car has stopped at the landing within the limits specified in BS EN 81-1. Door open and close buttons inside cabin: The elevator car shall be supplied with door open & close buttons inside the cabin with the following functions: • Door open button: When the elevator is in the idle mode with the doors closed or closing in normal mode, pressing this button will immediately open the doors. • Door close button: When the elevator doors are fully open, by pressing this button the elevator doors will close immediately. Note that the individual door open/close and reopen timings should be adjustable between 0 –5 sec. 25.1.41 Door Locks When both panels of centre opening doors are indirectly linked, e.g. by wire cord, belts or chains, each panel shall be electronically interlocked to prevent the lift car from being started or kept in motion (other than for slow speed levelling or re-levelling) unless all car and landing doors are closed. The locks shall have been tested in accordance with BS EN 81-1 and shall bear the type approval marks. Any trailing panel, e.g. two panel side opening doors, shall be directly mechanically linked to its leading panel in the closed position. It shall not be possible in normal lift operation to open the car door whilst the lift is in motion, except under the conditions noted in 31.1.31 ‘Advance Door Opening’. The lift contractor shall state in the tender response the maximum landing door gap that the door locks will tolerate. This shall be on the basis of what will be demonstrated during the acceptance tests by the use of rectangular obstructions standing 100mm high on the sill (on the go/not-go principle). 25.1.42 Landing Entrance Landing entrances shall have the certified fire resistance of 2 hours. Landing entrance architraves shall be provided where specified. The tender price shall allow for the design (in the material specified) shown in an illustration attached to the Tender. This drawing shall show clearly the extent of work that is to be included in the lift Tender.
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The material and finish of the landing door panels and any architraves shall be directed and approved by the Engineer. The lift contractor shall provide with his tender a full description of the materials and decorative finishes, including the colour, surface texture and grade of finish for the door panels and architraves included in his Tender. The lift contractor shall be willing to substitute to an equal or agreed value different materials and finishes if so required by the engineer or contract administrator. 25.1.43 Levelling accuracy The maximum difference in level between any landing and the car floor, after travelling in either direction (with the braking adjustment set to suit general passenger traffic) shall not exceed 5mm. The levelling accuracy shall be demonstrated under these specified load conditions during the acceptance tests. 25.1.44 Safety Features Emergency unlocking key from landing side provided on the header trim of the landing door for evacuation and maintenance work. Manual opening of the doors from inside the car, within landing zones during power failure. Full door height curtain of light shall be provided to reopen the doors when there is any obstruction to door closing. In addition to curtain of light, force limiters shall also be provided to reverse the closing of the doors in case of obstruction to door closing. Electrical interlocking to operate in conjunction with the car doors, so that elevator cannot operate unless doors are closed and locked. Overload indicator with buzzer. If the car is overloaded it shall be prevented from starting. The blinking overload indicator and the sounding buzzer shall signal the overload condition to the passengers. Emergency light with trickle charger and battery. 25.1.45 Performance The single floor flight time stated by the lift contractor in the Tender letter, shall be demonstrated during the acceptance tests and shall mean the time taken for a single floor run with the test floor to floor distance as shown on the tender drawings, when raising the rated load with the acceleration and braking adjusted to suit general passenger traffic. The time shall be measured from the instant the brake is released to the instant the brake is applied. 25.1.46 Testing On completion, a thorough test of the elevators under the working conditions shall be carried out in the presence of and to the approval of the Engineer.
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All materials used must be of highest quality and the best of their respective kinds and must comply with the relevant EN-81; 1998. All weights necessary to carry out the full load and overload tests must be provided by the Main contractor and removed after use. The Tests include the following:• No load current and voltage readings both on "Up" and "Down” Circuits. • Full load current and voltage readings both on "Up" and "Down” Circuits. • One and quarter load current and voltage readings both on "Up” and "Down" Circuits. • Stalling current and voltage and time taken to operate overload. • Overload protection. • Gate sequence relays, if provided and installed. • All interlocks. • Collective control and priority sequence, if installed. • Safety gear mechanism. • Speeds on Up and Down travel with full loading and empty car. • Door contacts. • Final terminal stopping device. • Normal terminal stopping device. • Insulation and earth continuity. The Contractor shall give the Engineer at least seven days written notice of the proposed date for the acceptance tests. The lift contractor shall have the type test certificates for the locks, buffers (where applicable), safety gear, landing doors, over-speed governor, ropes and belts, motors and motor generators for examination during the site test. 25.1.47 Controller The controller shall be placed in the lift shaft and shall be provided with a sheet metal enclosure with convenient opening front access door. If the enclosure houses major heat producing components such as resistor banks it shall be provided with suitable ventilation. All resistors installed shall be adequately supported. All heat generating components in the elevator controllers are to be properly self-ventilated and provided with sheet steel enclosures. Main controller and drive components are to be installed inside the hoist way with only the simple operating panel outside the hoist way on the top landing for all elevators. Materials used in the construction of the control equipment shall not support combustion. The components shall be designed and mounted in a manner which facilitates inspection, maintenance, adjustment and replacement. They shall be permanently labelled and the codes or abbreviations shall match the wiring diagram.
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Control circuits at normal mains voltage shall be connected between phase and neutral and shall be supplied through an isolating transformer. The transformer shall be double wound with earth screen between primary and secondary windings and one pole of the secondary winding shall be earthed through a removable link. The removable link is for test purposes and no switch, fuse or device shall be placed in that pole or circuit. Removal of the link shall prevent operation of the lift. A six figure counter shall be provided on the controller or in the operating panel to register the number of operations of the lift car. 25.1.48 Solid state controls When offering solid state controls which require more stringent environmental conditions that those specified in BS EN 81-1:Part 1 to ensure correct and stable lift operation, the lift contractor shall include in his tender for the necessary equipment to provide the correct conditions. Full details of this equipment shall be provided in a letter accompanying the Tender. Microprocessor based lift controls will be considered, provided full technical details are submitted with the Tender to enable the performance of the system to be assessed. Microprocessor based controls shall include the following design features: The system hardware shall be capable of fully supporting software based supervisory and motor control systems. Interruption of the electrical supply to the lift shall not affect the system memory or the software. (None volatile). It shall be possible to change the supervisory control algorithm to meet a change in use of the building by re-programming the instruction memory. It shall be possible to interrogate the system operating functions by use of a portable unit using diagnostic routines. This shall be achieved by means of communication access/test points on the controller. Visual indicators (e.g. LED’s) shall be provided on the controller to display information on the operational status of the lift. Multiplexing techniques may be employed to reduce the number of trailing cables normally required, if considered cost effective to do so. 25.1.49 Control system features The following control features shall be included: Car Preference Operation of the car preference switch shall change the control from ‘automatic’ to car preference and vice versa. On ‘car preference’, control of car movement shall be possible from the car only and the doors shall remain open until a car call is registered for a floor destination. All landing calls shall be by-passed and the indicators shall not be illuminated.
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On multiple lift installations the changeover operation shall not cancel registered landing calls Car top control station The car top controls shall comply with the requirements of BS EN 81-1 and shall include the following combined into one convenient station: Doors OPEN/CLOSE switch with the open and close positions legibly marked, or two push buttons with open and close functions legibly marked. Permanent light fitting, suitably protected and separately switched. 13A socket, complying with the requirements of BS1363, which shall be fed from the car light supply. A permanent notice reading “Tools and hand lamps to be certified doubleinsulated type, maximum 1000 Watts” shall be fixed adjacent to the 13A socket outlet. The control station shall be placed and designed so as to prevent it from being operated accidentally A terminal stop limit switch associated with the car top control operation shall be provided which shall, when the car is moving in the upward direction, stop the car with its roof not less than 1.8m from the top of the well. Emergency electrical operations switch (change-over switch) Up and Down push buttons with their functions legibly marked. A push button that renders inoperative the electrical safety devices stated in BS EN 81-1. The push button shall be legibly marked to indicate this function. 25.1.50 Intercom & Emergency Signal Inter-phone for two way three station hands free (inside car only) communication between the elevator cabin, top landing lobby and security personnel at ground floor/or the centralised maintenance room (with a maximum distance of 250m). Wiring shall be provided by the Main Contractor. In addition to the facilities for the emergency intercom, the Tender price shall include for an alarm bell (with indicator for multiple lifts) at the main reception desk, powered by the emergency lighting battery. The lift contractor shall check the suitability of this arrangement with the consultant before installation. While depressed, the alarm button in the car shall illuminate to indicate that the emergency signal is functioning and shall activate the intercoms. Wiring shall be provided by the Main Contractor. 25.1.51 Closed-Circuit TV Closed circuit TV (CCTV) shall be provided and installed within each passenger and service lift car by others. The lift contractor shall make provision for the installation of cableways for the CCTV signal and power cabling from the lift controller to the lift car.
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25.1.52 Electrical Installation of Elevators General wiring throughout the installation shall be carried out as specified in the Electrical Specifications. Plastic (EN-81; 1998) trunking shall be used wherever possible instead of multiple conduits. Flexible conduits shall be used between trunking and apparatus. All conduits in the pit bottom shall be metallic. Earthing of all the equipment shall be carried out as specified in Electrical Specification and as per IEE Regulations. Distribution Equipment shall contain all protection equipment for motors and circuits. These shall include overload protection, short-circuit protection, single phasing protection, etc. as appropriate. 25.1.53 Operation on standby power supply A standby power supply shall be provided by others. (If applicable) When standby power becomes available following the failure of the normal mains power supply, all lifts connected to the standby power shall return automatically to the main floor one at a time in sequence. The control system shall enable the cars to restart irrespective of their position in the lift well. On arrival at the main floor each lift shall park with doors open and shut down. When all lifts have shut down at the end of the parking sequence, one lift (the Fireman’s lift when provided) shall respond to car and landing calls in the normal manner. When the normal mains supply is restored, the lifts shall automatically return to normal service. The lift contractor shall check the suitability of this arrangement with the Engineer before manufacture. For standby power operation, the following shall be provided by others. • • •
The standby power supply. A change-over switch Pair of voltage-free cable runs to the machine room from a normally closed auxiliary contact on the changeover switch.
An alternative method of connection will be considered provided full details are given by the Tenderer in a letter accompanying the Tender. Any electrical installation work for the interconnection of separate lifts or groups of lifts for sequencing purposes are to be connected to the same standby power supply. 25.1.54 Painting With exception only of specifically and self finished surfaces, the whole of the equipment shall be painted one coat in the factory after full and proper preparation including priming. For exposed feature elevators the colour shall be strictly in accordance with the Architects direction in approved colours.
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Parts not normally accessible after erection such as the vertical car sling members shall have an additional coat applied in the factory. 25.1.55 Sundries A non-fading single-line wiring diagram shall be durably mounted and fixed in the maintenance personnel room. Detailed instructions regarding the moving of the lift in an emergency in accordance with BS EN 81-1 shall be durably mounted and fixed in the maintenance personnel room before the acceptance tests. A danger notice complying with the requirements of BS EN 81-1 shall be affixed in the maintenance personnel room 25.1.56 Noise Levels The average running noise level measured in the lift car should not exceed 56 dBA for passenger lifts and 60 dBA for service lifts.
25.2 Execution 25.2.1 Examination The Contractor shall verify site conditions under the provisions of EN81 & 115. Before ordering materials or commencing work the Contractor shall verify that the building structure associated with the system is within tolerance and take full account of the shape, configuration and material properties of the structure. 25.2.2 Preparation Prepare all surfaces and building fabric as required. Ensure necessary scaffolding, load hooks, power supply, room for storage, transport etc are available to ensure smooth installation of the works in accordance with the agreed programme. A list of work and exclusions to the contractor’s work to be treated as others responsibility are to be clearly stated. The same works shall be co-ordinated at site as and when required by the lift contractor and to be executed by others prior to proceeding with the installation. The lift contractor shall use appropriate checklists and mutually agreed schedules to ensure readiness of the site 25.2.3 Handling and storage System component parts shall be delivered to site, completely identified in accordance with coordinated working drawings and shop drawings prepared for this work. Components shall be stored in accordance with manufacturer’s instructions, above ground, properly protected from the weather and construction activities.
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25.2.4 Installation Before beginning installation in any area, examine all parts of the adjoining work into which applicable work is to be placed. Should any conditions be found which will prevent the proper execution of the work, installation shall not proceed in that area until such conditions are corrected by the main contractor. 25.2.5 Field Quality Control Field quality control shall be provided under provisions of ISO 9001-2000: Quality Control and the pre-established local agent’s ISO 9000-2000 procedures. As per procedure, necessary documents to be filled as and when required. All such documents are to be made available for inspection at the site during the entire process of installation until handover of the project. 25.2.6 Cleaning Clean all equipment and the surrounding area as necessary. Lubricate the moving parts of the installed works as per the manufacturer’s recommendations before handover the same to the Client. 25.2.7 Protection of finished work Work shall be protected reasonably by the contractor. Any additional protection required at site shall be by others. However, up to the handover of the equipment the responsibility of arranging the necessary protection of the installation shall rest with the lift contractor. 25.2.8 Maintenance requirements 25.2.8.1 Planned Maintenance The lift contractor shall allow for at least 11No routine visits at regular intervals during normal working hours to carry out preventative maintenance during the 12 months following acceptance. The lift contractor shall: Maintain each lift in accordance with his planned maintenance routines during normal working hours. Forward copies of the said routines with his tender. 25.2.8.2 Corrective Maintenance During the 12 months maintenance period following acceptance of the installation, the lift contractor shall provide a ‘call-out’ service 24hrs x 7 days per week with zoning maintenance service to carry out corrective maintenance (including adjustment and repair) to restore a lift which has ceased to meet an acceptable condition.
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25.2.8.3 Emergency Maintenance During the twelve months following acceptance of the installation, the lift contractor shall provide a call-out service, both during and outside normal working hours to carry out emergency maintenance. The lift contractor shall arrange for a qualified technician to attend to emergency maintenance calls on his behalf when the lifts to be maintained are such a distance from his depot that he cannot comply with this Clause in person. 25.2.8.4 Workmanship and Materials – General The lift contractor shall supply all labour, tackle, materials, lubricants and replacement parts (including lamps) for the complete execution of the maintenance works. The work shall be carried out by competent tradesmen conversant with statutory regulations and the rules and regulations of the local authority concerned. 25.2.8.5 Schedule This Schedule is intended to be used as an indication of work within this section. It is not necessarily comprehensive or complete and it is the Contractor’s responsibility to ascertain to complete the full works intended and as shown on the drawings, specification and Contract or thereby implied.
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178
Asphalt Paving
26.1 General 26.1.1 Scope of Works The scope of works for asphalt paving includes all works required to install roads, and kerbs areas, in areas where the internal roads meet the existing road and with all associated finishes in areas of vehicular traffic such as markings etc.
26.2 Asphalt Paving All works and materials with exception of Method of Measurement and Basis of Payment, to be in accordance with the Sultanate of Oman General Specifications for Roads April 1994: Section 300
Granular and stabilised sub-base, base course and stabilised sub-grade (subsections 301, 302, 303)
Section 400
Bituminous Pavement (Subsections 401, 402, 405, 406).
Section 1400
Road markings (sub section 1402)
Section 1800
Plant and Equipment (Subsections 1801,1802,1807,1808,1809 and 1810)
26.3 Concrete Kerbs 26.3.1 Description The work shall consist of the construction of kerbs in accordance with the Specification and in conformity with the lines, grades and typical sections shown on the Drawings or established by the Engineer. 26.3.2 Materials Concrete Concrete shall conform to the requirements of the concrete Specification for concrete C25 type 3.
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26.3.3 Fabrication 26.3.3.1 General Kerb sections shall be pre-cast from concrete produced from fully automatic batching plant. The kerbstones shall be cast hydraulically and shall be of solid concrete. Kerbstone cast in two layers shall be rejected. 26.3.3.2 Testing Tests shall be carried out on the concrete mix prior to use to ascertain that the strength and surface finish requirements can be met. If the required strength and surface finish is not obtained, then the Engineer may order revisions to be made in order to achieve the special requirements. 26.3.3.3 Dimension Kerbs shall be manufactured to the dimensions shown on the Drawings. For horizontal curves of radius less than ten (10) metres, kerb sections shall be manufactured to the radius shown, and in no circumstance will straight units or portions of same be permitted. In general dimensions of kerbs shall be as indicated by Ministry of Communication, Highway Design Standard, Drawing DS 1.26. 26.3.3.4 Surface Finish The finished product shall be of solid appearance with clean faces, be free of segregation, honeycombing, pits, broken corners or other defects. Curves faces shall be of constant radius with a smooth change from radius to plane face. Tolerances of manufacture shall be three (3) mm in any one dimension and end faces shall be truly perpendicular to the base. All concrete surfaces against soil shall receive three coats of bituminous paint to a paint thickness of 350 microns. 26.3.4 Construction 26.3.4.1 Setting Out Kerbs shall be set out to the lines and grades shown on the Drawings. Under no circumstances will it be permitted for levels to be set by direct measurement from pavement layers. 26.3.4.2 Sub-grade The sub-grade shall be excavated to the grades and sections shown on the Drawings. The sub-grade shall be compacted to a uniform density as approved by the Engineer. Unsuitable material shall be excavated 150 mm below sub-grade elevation and replaced with suitable backfill material, which shall be compacted to meet the specified requirements. All sub-grade shall be compacted and graded to a smooth surface and shall be approved by the Engineer before placing concrete.
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26.3.4.3 Bedding Kerbs Kerb sections shall be laid either directly onto a wet concrete base or onto a sand/cement (3:1) mortar bedding, 20 mm thick, on a previously laid concrete base. The dimension of the base shall be as shown on the Drawing SCD 2.l of Ministry of Communication Highway Design Manual 1994. 26.3.4.4 Kerb Haunch After kerb units have been laid contiguous, haunching shall be poured using approved forms. The concrete shall be the same as that used in the base. No pavement layers shall be laid against kerning until such time as the haunching is complete, cured and backfilled and the backfill compacted. 26.3.4.5 Joints Joints between kerb sections shall have a width of four (4) mm and be filled with a sand/cement (1:1) mortar plasticizer, and sufficient water to make the mixture plastic and easily smoothed. A grooving tool shall be used to produce a smooth circular section groove not more than three (3) mm deep in all joints. Grouted joints shall be cured by an approved method to the Engineer’s satisfaction. Expansion, contraction and construction joints shall be provided as directed by the Engineer. All kerbs shall be thoroughly cleaned of all extraneous material prior to approval. 26.3.4.6 Tolerance Kerbs shall be laid within tolerance of plus or minus three (3) mm, at each end of element, to the lines and grades given on the Drawings.
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181
Through Coloured Render
27.1.1 Location One Coat Through Coloured pre mixed pigmented render for application to all external walls (except areas of stone cladding). 27.1.2 Product Specification Product : Weber.pral M Monocouche Render (or equal Approved) 27.1.3 Finish Scrape textured finish 27.1.4 Background: Masonry suitable to take a designation III (1:1:6) mix (should be confirmed by block manufacturer). 27.1.5 Preparation The nature and condition of the background is a prime consideration in deciding the preparatory treatment Prior to the application of weber.pral M. Substrate must provide suitable key / suction. Guidance in respect to movement joints and bed joint reinforcement should be obtained from block manufacturer and MUST be adhered to. The recommendations detailed in BS5628 : Part 3 and BS5262 should be observed. 27.1.6 Render Coat: Proprietary reference: weber.pral M by Weber (or equal approved) Colour: To be agreed from Standard Colour Range. Thickness: 15mm (finished) Finish: Scraped. Angles – weber.pral renders: Except where specified otherwise, form external angles using clean, straight chamfered timber battens.
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When the surface is sufficiently hard, normally between 5-16 hours after application, scrape the surface in small circular motions using a weber Scraping Tool to remove all laitance and bring the application to the specified thickness. Remove no more than 3mm from the surface thickness. Immediately after scraping, brush using a clean soft bristle brush to remove dust. Ensure scraped finish is even over the entire surface, with no areas missed. 27.1.7 Accessories Render only beads shall be of appropriate design, gauge and material as approved by Weber. Beads to be located and fixed as detailed on System Manufacturer's details (this may involve bedding RO beads in mortar). Where mesh cloth is being incorporated as treatment to areas of potential high stress it shall be Weber. mesh standard duty, balanced, open weave, glass fibre mesh cloth, coated for alkaline resistance, available in 1m x 50m rolls.
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Carpets
28.1
General
28.1.1 Scope of Work Supply and installation of carpeting where shown on the drawings or as indicated in the finishes schedule. 28.1.2 Relevant British Standards Conform to the requirements of the following British Standards where applicable:-
BS 1006 : 1974
Methods of test for colour fastness of textiles.
BS 4223 : 1989 Methods for determination of constructional details of textile floor coverings with yarn pile. BS 4682 : coverings.
Methods of test for dimensional stability of textile floor
BS 5229 : 1982 carpets..
Methods of determination of tuft withdrawal force for
BS 5325 : 1982 coverings.
Code of Practice for the installation of textile floor
BS 5422 : 1989
Classification of Adhesives for construction.
BS 5808 : 1979 coverings.
Specifications
for
underlays
for
textile
floor
28.1.3 Literature and Samples Provide comprehensive technical literature on proposed materials with illustrations of all colours, patterns and textures available. Provide samples of proposed products if so requested by the Engineer.
Selection of product type, colour, pattern and texture is to be to the approval of the Engineer.
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28.1.4 Guarantee All carpeting is to be guaranteed for a period of at least 10 years from date of project handover against excessive surface wear, edge ravel, backing separation, shrinking, stretching and static electricity.
“Excessive surface wear” means loss of more than 15% by weight of face fibre.
28.2
Materials
28.2.1 Carpet Proprietary heavy duty commercial quality tufted broadloom carpet “Autumn Harvest” or equivalent range by “Lees Commercial Carpets” or equal and approved. Colour will be selected by the Engineer. 28.2.2 Carpet Accessories and Fixing Materials
This includes underlay, edge binding tape, joining materials, grippers, etc. All such items are to be as recommended by the carpet manufacturer, and as approved by the Engineer. 28.2.3 Edging Strip
Proprietary ribbed 25mm wide solid brass clip-in cover strip. 28.2.4 Adhesives As recommended by the floor finish manufacturer of a type that allows the floor covering to be securely installed and easily stripped.
28.3
Execution
28.3.1 Execution Generally Comply with BS 5325 Installation of textile floor coverings subject to any qualifications given below. Where necessary, check the dryness of the base in accordance with the appendix to the CP. 28.3.2 Preliminary Checks Ensure that working conditions and background are suitable. Bases shall be clean and dust free, smooth, level and dry. Ensure there is sufficient material from the same production run for each specified type to guarantee uniform appearance when laid.
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28.3.3 Planning and General Layout Wherever possible and appropriate, lay carpet/linoleum with consideration to the following general requirements; when requirements conflict, agree the procedures with the Engineer:
a. b. c. d. e. f. g.
Seams to run the length of the area. Traffic routes along rather than across seams. Light from windows not falling across seams Pile laying away from lighting. Seams lining up in direction of manufacture. Avoidance of cross-seams. Patterning matched.
Lay out flooring material before cutting to layout approved by the Engineer, allowing for ready access to floor trunking or the like. Lay out material to minimise cutting and avoid unduly narrow or small cutoffs. 28.3.4 Working with Adhesives Comply with the following when laying carpets or linoleum on adhesive:-
a)
Clean the base and prime if necessary: allow primer to dry thoroughly.
b)
Ensure there is adequate ventilation. Do not smoke (tobacco smoke and some adhesive fumes combine to form poisonous gases).
c)
Spread adhesive to an even coverage without trowel ridges.
d)
Remove any spilt adhesive with solvent immediately.
28.3.5 Installation Generally Installation to be carried out in strict conformance with the manufacturers written instructions. 28.3.6 Completion Leave floor finish clean and adequately protect the completed installations from any contamination or traffic that could harm the flooring till handover. 28.3.7 Warranties Wear - Lifetime of carpet. No more than 10% face yarn loss by weight in normal use.
Static- Lifetime
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Flagpoles and Flags
29.1
General
186
29.1.1 Scope of Work Supply and installation of flag and flagpole where shown on the drawings. 29.1.2 Literature and Samples Provide comprehensive technical literature on proposed materials with method of installation. Prepare and submit shop drawings for Engineer’s approval.
29.2
Materials
29.2.1 Flagpoles and flag Proprietary ‘Zephyr’ outdoor Flagmaster flag poles and flags or equal approved.
Nominal Length Of Flagstaff 6.0m [2 section]] Height Above Ground, [ using ground socket ] 6.16m Top Section Diameter 64mm Bottom Section Diameter 76mm 76mm Ground Socket Diameter [ internal ] 77mm Ground Socket Diameter [ external ] 83mm Length Of Ground Socket 850mm Overall Length Of Flagstaff 7.01m Packed Size 4.3 x 0.10 x 0.10 m Packed Weight 16kg Foundation – To be designed by installer. Flag Size [Landscape] 180 x 120cm [2yrd ]
29.3
Execution
29.3.1 Installation Generally To be installed in accordance with supplier’s specifications and directions.
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Carpark shades
30.1
General
187
30.1.1 Scope of Work Supply and installation of propreitory carpark shade structures where shown on the drawings. 30.1.2 Literature and Samples Provide comprehensive technical literature on proposed materials with method of installation. Prepare and submit shop drawings for Engineer’s approval.
30.2
Materials
30.2.1 Carpark shades Proprietary ‘K-Span’ carpark structures or equal approved.
The support framework to be in factory painted G.I. steel. Vertical cantilevered supports to be at 6.0m c/c and to cover a length of 6.25m. Roofing to be powder coated, K-span roofing sheet. Foundation to be designed and constructed taking into consideration the above spans, wind load, etc.
30.3
Execution
30.3.1 Installation Generally To be installed in accordance with supplier’s specifications and directions. The construction to be water tight.
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188
Epoxy Resin Flooring
31.1 General 31.1.1 Scope of work The supply and installation of Epoxy Resin Flooring Finish to: •
Bullion vehicle parking
•
Vault
•
Armoury
31.2 Material 31.2.1 Resin Flooring Product For Areas Not Exposed To Weather Or UV Radiation (Toilets) Substrate: Concrete, Cement based screeds, polymer-modified cementitious screed. Preparation: Captive shot blasting to remove top skin of cement, laitance, and cement slurry. Resin flooring system: Manufacturer: BASF Construction Chemicals UAE LLC, PO Box 37127, Dubai, UAE (or equal approved). Primer reference: MASTERTOP Primer 2 applied at 0.15-0.30 kgs/m2 Resin flooring reference: MASTERTOP 1330 -Polyurethane Waterproofing and Protective Traffic Deck Coating System with Crack Bridging Ability and UV resistant top coat Application: 1.2-2.0 mm Colour: 3-Tone colour schemes differentiating parking spaces, driveways and walkways Surface finish/ treatment: Top coat (2 coats minimum) MASTERTOP TC 458 Flatness/ Surface regularity:
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Sudden irregularities: Not permitted. Classification of surface regularity to BS 8204-6: SR2. Other requirements: Coving /Skirting/ Upstands As per manufacturer’s recommendations Resin Flooring Product For Parking Areas Exposed To Weather Or UV Radiation (External Areas) Substrate: Concrete, Cement based screeds, polymer-modified cementitious screed. Preparation: Captive shot blasting to remove top skin of cement, laitance, and cement slurry. Resin flooring system: Manufacturer: BASF Construction Chemicals UAE LLC, PO Box 37127, Dubai, UAE (or equal approved). Primer reference: MASTERTOP Primer 2 applied at 0.15-0.30 kgs/m2 Resin flooring reference: MASTERTOP 1332 -Polyurethane Waterproofing and Protective Traffic Deck Coating System with Crack Bridging Ability and UV resistant top coat Application: 1.5-2.0 mm Colour: 3-Tone colour schemes differentiating parking spaces, driveways and walkways Surface finish/ treatment: Top coat (2 coats minimum) MASTERTOP TC 458 Flatness/ Surface regularity: Sudden irregularities: Not permitted. Classification of surface regularity to BS 8204-6: SR2. Other requirements: Coving /Skirting/ Upstands As per manufacturer’s recommendations.
31.3 Preparation Of Substrates 31.3.1 Testing Moisture Content Of Substrates Drying aids: Remove minimum four days prior to test. Test: To BS 8203, Annex A using an accurately calibrated hygrometer or moisture meter. Location of readings: Corners, along edges, and at various points over the test area. Acceptability: Do not lay resin flooring until readings are scrutinised by manufacturer/approved applicator_
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31.3.2 Surface Hardness Of Substrates General: Substrates must restrain stresses that occur during setting and hardening of resin. Test for surface hardness: To BS EN 12504-2 using a rebound hammer. Test results: Submit. Areas of non compliance: Submit remedial proposals.in accordance with flooring system manufacturer’s recommendations 31.3.3 Preparation Of Substrates Generally Chases/ Saw cuts: Cut/ break out at skirtings, free edges, movement joints, etc. for termination of resin flooring. Blow holes, cavities, cracks, etc: Fill with repair product recommended by resin flooring Manufacturer. Cleanliness: Remove surface contaminants, debris, dirt and dust. Surface texture: Suitable to accept resin flooring and achieve a full bond over the complete area. 31.3.4 Existing Substrates Preparation: Captive shot blasting to remove surface imperfections, ingrained contaminants, coatings and residues. Contaminated areas: Submit proposals for removal and repair in accordance with manufacturer’s recommendations
31.4 Laying Flooring 31.4.1 Workmanship Operatives: Trained/ Experienced in the application of resin floorings. Evidence of training/ experience: Submit on request. Fillers and incorporated aggregates: Thoroughly mix in to ensure wetting. Avoid over-vigorous mixing resulting in excessive air entrainment. Scattered aggregates: Broadcast onto wet surface of resin. Appearance: Consistent. Curing: Allow appropriate periods between coats and before surface treatments and trafficking/ use. 31.4.2 Control Samples Complete areas of finished work in the following locations: in advance of the remainder lay 36sqm samples of each floor type, locations to be approved by ENGINEER. Approval of appearance: Obtain before proceeding.
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31.4.3 Primers Application: Even to completely wet, penetrate and seal substrates. Coverage per coat:0.15-0.3kgs.m2 as per substrate porosity. Curing period (maximum): 24 hours at 30-35°C before application of resin flooring. 31.4.4 Bond Strength Of Resin Flooring Contact surfaces: Substrate and fully cured resin flooring. Bond: In accordance with manufacturer's performance data. Test: To BS 8204-6, clause 11.4 and BS EN 1542. 31.4.5 Resin Skirtings/ Upstands Quality: Render grade resin. Colour: As flooring. Profile: Radius cove. Top edge of Skirting/ Upstands: Retain with a stop bead. Transition with resin flooring: Sealant movement joint. 31.4.6 Free Edges Of Resin Flooring Transition to abutting floor finishes: Straight and smooth. Retention of resin edges: See termination detyails provided by manufacturer. 31.4.7 Sealant Movement Joints Selection of product and design as per recommendations of Resin Flooring system manufacturer .BASF Construction Chemicals UAE LLC ,P O Box 37127, Dubai ,UAE. Location: Centre over movement joints in substrate. Preparation and application: As section Z22. Retention of resin edges: Joint width: As per design Sealant: Masterflex 460-as manufactured by BASF Construction Chemicals UAE LLC.
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Anti- Static Vinyl Tiles
32.1 General 32.1.1 Scope of work The supply and installation of Anti-Static vinyl tiles on raised access flooring in computer data centres, electrical rooms, utility rooms, all are indicated on dwgs. and finishes schedule.
32.2 Material 32.2.1 Anti-Static Vinyl tiles Hard wearing homogeneous anti-static vinyl floor tiles with dissipative properties, engineered for electro static dissipative (ESD) protection
The flooring shall be Polyflor 2000 SD tiles, as manufactured by Polyflor Ltd. of Manchester, England or equal approved The flooring shall be tiles with static dissipative properties in 2.0mm thickness. It shall be homogeneous and monolayer in construction. The static dissipative properties must be present throughout the full product thickness. The flooring shall conform fully with the requirements of EN 649. In respect of flame spread, the flooring shall have been fully tested to EN 13501-1 and certified as having Class Bfl-S1, achieving the criteria EN ISO 9239-1 ³8kw/m2 and the mandatory requirement of EN ISO 11925-2 pass. It shall be tested to ASTM E648 and certified as having passed with a Class 1 rating With regard to EN 13893 for slip resistance, the flooring shall be classified DS, making it suitable for use in areas which are predominantly dry, but with occasional spillage.
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The product must have been fully tested for abrasion resistance to the Frick Taber test EN 660: Part 2 and be in abrasion group M, as defined in EN 649. With regard to static dissipative properties, the flooring must conform to the requirements of IBM specifications. When tested to EN 1081 R1/R2 the flooring must have a resistance of 80 minutes
The completed system should carry a full warranty from the supplier.
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33.2.4.3 Adhesives for bathroom areas Adhesive shall be two part latext modified as per manufacturers specification. 33.2.4.4 Grout compounds for bathroom areas Grout system shall be epoxy based stainless grout as per manufacturer's specification. The grout shall comply with the following characteristics: Stainless, pigment free, colour fast epoxy grout suitable for floor and wall installations. Tensile strength
11.7 MPa (1700 psi)
Compressive strength
51.7 Mpa (7500 psi)
Thermal shock resistance
7.6 MPa (1100 psi)
Shrinkage
0.19%
Sag resistance
pass
Water cleanability
> 80 minutes
33.2.5 Joint sealant, back-up strip, performed joint and grout As recommended by BS 5385. 33.2.6 Cement Ordinary Portland cement complying with BS 12 or Omani Standard No. OS7. 33.2.7 Sand Clean sharp sand complying with BS 882 (grading Zone 2 or 3). 33.2.8 Water Clean potable water shall comply with specification for Concrete Work. 33.2.9 Mortar for floor tiles Thin-set mortar as specified here in. 33.2.10 Separating membrane Polythene sheet, 250 microns thick. 33.2.11 Grout Proprietary grout as recommended by tile manufacturer. Colour to match the tile and to the approval of the Engineer. The grout shall be water resistant.
33.3 Execution All as outlined in item 10.3 of Section 10 – Ceramic Tiles.
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