CI/SfB
(52) August 2004
DRAINAGE DESIGN GUIDE
www.marshalls.co.uk/drainage
• • • • • •
Flat or steep gradients Heavy vehicular loading Shallow depth construction Temporary storm water storage Appropriate aesthetic finishes Minimal maintenance
The range of linear drainage systems is further enhanced by new innovative products such as Traffic Drain, Landscape Drain, Max-E-Channel inlaid covers and Slot Drain. Most importantly, with Marshalls, the optimum economical drainage design can be readily achieved. All Marshalls systems comply with the requirements, of the appropriate standard; BS EN 9001, the Highway Agency’s Specification for Highway Works together with the requirements of British Standard, BS EN 1433:2002. BS EN 1433:2002 Marshalls’ policy is to manufacture products that, as a minimum requirement, comply with the relevant European, British or Company Standard as appropriate. Following the publication of any European Standard the government recognises that there is a period whereby manufacturers need to realign their product offer, quality control and in many cases the manufacturing operations. INTRODUCTION Almost all impermeable surfaces require some form of surface water drainage. Highways, service and storage facilities, car parks and pedestrian areas are best accommodated by either combined kerb and drainage or linear drainage systems bearing in mind location, efficiency, traffic loading, maintenance and aesthetics. Marshalls is one of the leading suppliers of drainage products and offers a comprehensive range of surface water drainage systems to cater for all applications. Marshalls also understands the design principles of Sustainable Urban Drainage Systems and particularly how designers can achieve sustainable drainage solutions using linear drainage systems or impermeable pavement design or an appropriate combination of both systems as the project requires. Two combined kerb and drainage systems are available - the original, well established Beany Block and now the recent addition of a smaller version, appropriately named Mini Beany. These are complemented by the large capacity Max-E-Channel and Birco Linear drainage systems. This comprehensive range of drainage options allows the designer to cater for: • Long lengths of highway (several kilometres depending on carriageway width and gradient) • Large or small paved areas • High storm water intensities
It is Marshalls' intention that the manufacture of all its linear drainage products complies with BS EN 1433:2002 within the required time frame. The load classification system documented in this Standard is referenced throughout this Design Guide. Details of product specific requirements are published in the product data sheets. DESIGN GUIDANCE AND CAD Marshalls Computer Aided Design service can be called upon by specifiers and contractors alike in relation to the detailing of Marshalls Drainage products. The drawings are created in consultation with the Design Team. Contact
[email protected]
INTRODUCTION
TRAFFIC DRAIN
CONTENTS .................................................................................................. 3
CONTENTS ................................................................................................73
PRODUCT RANGE .................................................................................... 6
COMPONENTS ........................................................................................74
THE CASE FOR LINEAR DRAINAGE ..................................................... 8
HYDRAULIC DATA ..................................................................................76
COST COMPARISON ................................................................................ 9
STANDARD DETAILS .............................................................................78
SELECTION PROCESS ............................................................................10
CONSTRUCTION .....................................................................................84
DESIGN PRINCIPLES ..............................................................................14
SPECIFICATION .......................................................................................85
GENERAL CONSTRUCTION .................................................................18
ITEM CODES .............................................................................................86
CONTENTS
CONTENTS
CAST IRON ................................................................................................18 DESIGN SERVICE .....................................................................................19
SLOT DRAIN
FURTHER INFORMATION .....................................................................19
CONTENTS ................................................................................................87
REFERENCES & FURTHER READING .................................................20
COMPONENTS ........................................................................................88 HYDRAULIC DATA ..................................................................................89
BEANY® BLOCK
STANDARD DETAILS .............................................................................90
CONTENTS ................................................................................................21
CONSTRUCTION .....................................................................................91
COMPONENTS ........................................................................................22
SPECIFICATION .......................................................................................92
HYDRAULIC DATA ..................................................................................24
ITEM CODES .............................................................................................92
STANDARD DETAILS .............................................................................27 CONSTRUCTION .....................................................................................36
LANDSCAPE DRAIN
SPECIFICATION .......................................................................................39
CONTENTS ................................................................................................93
ITEM CODES .............................................................................................40
COMPONENTS ........................................................................................94 HYDRAULIC DATA ..................................................................................96
MINI BEANY
STANDARD DETAILS .............................................................................97
CONTENTS ................................................................................................41
CONSTRUCTION .....................................................................................98
COMPONENTS ........................................................................................42
SPECIFICATION ......................................................................................99
HYDRAULIC DATA ..................................................................................44
ITEM CODES .......................................................................................... 100
STANDARD DETAILS .............................................................................46 CONSTRUCTION .....................................................................................54
BIRCO
SPECIFICATION .......................................................................................57
CONTENTS ............................................................................................. 101
ITEM CODES .............................................................................................58
COMPONENTS ..................................................................................... 102 HYDRAULIC DATA ............................................................................... 109
MAX-E-CHANNEL
STANDARD DETAILS .......................................................................... 112
CONTENTS ................................................................................................59
CONSTRUCTION .................................................................................. 116
COMPONENTS ........................................................................................60
SPECIFICATION .................................................................................... 117
HYDRAULIC DATA ..................................................................................62
ITEM CODES .......................................................................................... 118
STANDARD DETAILS .............................................................................65 CONSTRUCTION .....................................................................................70 SPECIFICATION .......................................................................................71 ITEM CODES .............................................................................................72 3
STATEMENT
ENVIRONMENTAL POLICY
Marshalls plc is the UK’s leading manufacturer of superior
Marshalls is committed to achieving the highest standards of
concrete, clay and natural stone products which transform
environmental performance and continually aims to prevent
landscapes and redefine the built environment. With more
pollution and minimise the impact of its operations. The
than 120 years experience, Marshalls’ expertise in materials
Group’s aim is that no lasting environmental damage occurs
sourcing, manufacturing, distribution, technical advice and
as a result of its activities, and policies are being implemented
customer service is respected within the industry, making
to ensure that all of its operations meet or exceed the
us the preferred supplier for prestigious projects including
requirements of legislation and applicable best practice.
Trafalgar Square, London; Trafford Centre, Manchester and the Falkirk Wheel, Scotland.
Marshalls regards compliance with relevant environmental laws, and the adoption of responsible standards where no
As a truly customer focused organisation, Marshalls’
legislation exists, as an integral part of its business strategy
commitment to delivering and exceeding client satisfaction
and is committed to considering the environmental impacts
throughout the supply chain is our priority. Product
associated with its products throughout their life-cycle.
innovation is at the heart of our business, ensuring our customers have access to a comprehensive and enviable product portfolio to complete their landscaping requirements, from paving, block paving, kerb and drainage to street furniture. Injecting innovation into new product development and investing in revolutionary manufacturing techniques cements Marshalls’ market leading position. Our vision, to deliver the products customers want, on time, every time, is supported by Marshalls’ teams of design, technical and customer service experts, ensuring Marshalls can service clients’ needs from project and design conception
Marshalls has committed to monitor its environmental performance in line with Construction Products Association requirements, and to set objectives and targets to improve its impacts in key areas. These will be reviewed on at least an annual basis to ensure continual improvement. Marshalls will continue to raise environmental awareness within the Group through the development and training of its employees, and will communicate openly and consult with customers, suppliers and other stakeholders on relevant environmental matters.
right the way through to installation and maintenance. As a
Marshalls strives to conserve natural habitats and create
major plc, Marshalls was recently rated as the UK’s 37th most
additional areas of wildlife value wherever possible. The
admired company, and as a group its expert companies have
Group also recognises the need for sympathetic restoration
become the landscape sector’s benchmark for excellence.
and after use of quarry sites, and considers the character of
The company is committed to quality in everything it does,
the local environment and the concerns of the community
offering its customers honesty, integrity and experience for
when planning such matters.
total peace of mind. QUALITY POLICY The new Marshalls Drainage Design Guide builds upon its well
Marshalls aims to produce and supply to all clients excellent
received predecessor.
building materials for all applications. It is the intention to
This new version has therefore added to the features and
achieve this by offering;
benefits our colleagues in the building and construction
•
industry have identified.
•
First class customer service
•
Complete and on-time deliveries
•
Free technical advice
Most importantly, this new Design Guide is vitally linked to, and supported by, a continually developing website
Products that meet all standard requirements
which adds further functions and features to the vast pool of
Marshalls is committed to continual review and improvement
information Marshalls provides for users.
of processes, products and services and places its customers
Suffice to say Marshalls continues to carry the most comprehensive range of quality landscape and building materials available to the construction industry.
first in considerations. These aims will be achieved by continual training and communication to all personnel of key business objectives. Objectives are set at Group level and instigated by Divisional and Regional management within annual Business Plans.
4
CONTENTS
INTRODUCTION
CONTENTS ................................................................... 3 PRODUCT RANGE ..................................................... 6 THE CASE FOR LINEAR DRAINAGE ...................... 8 COST COMPARISON ................................................. 9 SELECTION PROCESS .............................................10 DESIGN PRINCIPLES ...............................................14 GENERAL CONSTRUCTION ..................................18 CAST IRON .................................................................18 DESIGN SERVICES ...................................................19 FURTHER INFORMATION ......................................19
INTRODUCTION
REFERENCES & FURTHER READING ..................20
5
PRODUCT RANGE
PRODUCT RANGE A15
CLASS A15 15kN TEST LOAD Areas used by pedestrians and cyclists only.
B125
C250
D400
CLASS B125 125kN TEST LOAD Footways, pedestrian areas, car parks, car parking decks and similar areas used by light, slow-moving traffic.
CLASS C250 250kN TEST LOAD Kerb-sides, general parking areas and hard shoulders that extend to a maximum of 0.5m into the trafficked area.
CLASS D400 400kN TEST LOAD Carriageways of roads (including pedestrian streets and parking areas) catering for all legal roadgoing vehicles.
BEANY® BLOCK
E600
CLASS E600 600kN TEST LOAD Private traffic areas used by vehicles imposing particularly heavy wheel loads.
F900
CLASS F900 900kN TEST LOAD Special areas of abnormally heavy wheel loads e.g. aircraft pavements.
BEANY® BLOCK Combined Kerb and Drainage System
MINI BEANY Combined Kerb and Drainage System
MAX-E-CHANNEL Slot Drainage System
MINI BEANY TRAFFIC DRAIN Slot Drainage System MAX-E-CHANNEL C250 MAX-E-CHANNEL INLAID MAX-E-CHANNEL CONCRETE E600 MAX-E-CHANNEL CAST IRON
SLOT DRAIN Slot Drainage System
INTRODUCTION
TRAFFIC DRAIN LANDSCAPE DRAIN Slot Drainage System SLOT DRAIN
LANDSCAPE DRAIN BIRCO Grid System BIRCO LITE
Birco Lite
Lite Galvanised Grating 30 x 15mm mesh Lite Galvanised Grating 30 x 30mm mesh Lite 'Heelsure' Cast Iron Grating 100 x 6mm slots
BIRCO 100 BIRCO 150 BIRCO 200
Lite Cast Iron Grating 100 x 12mm slots
Lite Cap Outlet (0/0) 110mm O.D. Lite 100 Channel (0/0) Lite 100 T Junction
BIRCO 300 6
HB Top Block
45O Splayed Top
Concrete C250
Reinforced Concrete E600
Symmetrical Low Hole
Base 185
Cast Iron F900
Top Unit Cast Iron F900
Inlaid Unit
Base 185
0/0
100 Galvanised Grating 20 x 30mm mesh
5/0
Base 285
Base 205
Base 235
Birco 100 0/0 5/0
Slot Drain 90
Top Unit
Base 285
10/0
10/0
Birco 150
Base 335
Base 295
Base 335
Base 365
Base 630
Base 385
Base 365
Base 630
Base 385
15/0
20/0
15/0
20/0
Birco 200
Birco 300
100 Galvanised Grating 30 x 15mm mesh
100 'Heelsure' Cast Iron Grating 100 x 6mm slots
150 Galvanised Grating 20 x 30mm mesh 150 Cast Iron Grating 150 x 12mm slots
100 Cast Iron Grating 100 x 12mm slots 100 Cap Outlet 106mm O.D.
150 Cap Outlet (0/0) 158mm O.D.
100 Channel
150 Channel (0/0)
100 T Junction Channel
150 T Junction Channel (0/0)
200 Galvanised Grating 20 x 30mm mesh 200 Cast Iron Grating 200 x 18mm slots 200 Cap Outlet (0/0) 198mm O.D. 200 Channel (0/0) 200 T Junction Channel (0/0)
I
100 Galvanised Grating 30 x 30mm mesh
I
Birco 100
Base 235
Base 295
300 Cast Iron Grating 125 x 20mm slots
D
Slot Drain 105
Base 205
45º Splayed
PRODUCT RANGE
HB Symmetrical
INTRODUCTION
HB Straight Backed Low Hole
D
HB Straight Backed
>ÝÊÊ Ê
>iÊ VÀiÌiÊÀÊ >ÃÌÊÀÊÀ>Ì}î
300 Cap Outlet 308mm O.D. 300 Channel
7
THE CASE FOR LINEAR DRAINAGE
THE CASE FOR LINEAR DRAINAGE INTRODUCTION The growing demand for more cost-effective and less complicated drainage systems has led to modern linear drainage becoming the preferred choice amongst specifiers and contractors alike. Marshalls’ unique linear drainage systems combine the clear-cut advantages of linear drainage over traditional point drainage, with the benefits of a high quality, robust precast concrete product. SURFACE WATER INTERCEPTION • More efficient at intercepting running water • Ponding is reduced or eliminated as is streaming water across a site SHALLOW DEPTH OF CONSTRUCTION • Inherently shallow construction required • Savings due to reduced excavation • Reduces construction time, offering further savings • Less conflict with existing underground services • Reduced quantities of spoil to be disposed of
INTRODUCTION
EASE OF DESIGN Performs more efficiently with just the use of concrete channels, grates, outfalls and reduced amounts of pipework. • Only requires shallow depth construction • Limited number of components required • Does not require complex crossfalls to be incorporated • Design of crossfalls and longitudinal falls of adjacent hard landscaping is straightforward • Improved end user performance
8
EASE OF INSTALLATION • Channel line and level can be set out with ease • Crossfalls are less complex to set out or construct compared with point drainage • Expensive construction time saved due to shallow construction • On-site errors are easier to avoid • Unlike other options, Marshalls’ systems do not require temporary ballast (e.g. sand) during installation • Inherently strong and robust precast concrete reduces on-site damage SIGNIFICANT COST SAVINGS BY REDUCING CARRIER PIPES • Many schemes can utilise the inherent ability of a channel or combined kerb and drainage system to act not just as the traditional gully in point drainage, but also as the carrier pipe in storing and transporting surface water. • Any carrier pipes will be at a shallower depth with resultant cost savings • Fewer expensive manholes required • Less spoil to be removed from site • Improved health and safety on site through reduced need for deep excavation work
Fig. 1 Typical point drainage system, illustrating the need for complex crossfalls with attendant implications for design, installation and cost
Fig. 2 Typical equivalent linear drainage system
STORAGE OF SURFACE WATER Linear drainage can utilise the storage capability of its channels to good effect where there are limitations placed on the total outflow of the scheme. This temporary storage facility has been utilised to: • Attenuate peak flows • Avoid or reduce costs of balancing ponds or reservoirs • Reduce pipework sizes at outfalls REDUCED MAINTENANCE • Easier and less costly to maintain than other forms of surface water drainage systems • Easy to access along the whole length of the linear drainage system via removable gratings or regular access points • Blockages will not completely disrupt the whole system and can be dealt with easily • Inherently strong and robust precast concrete systems resistant to the effects of freeze thaw and de-icing salts AESTHETICS • Wide choice of decorative metal gratings or textured and coloured top blocks to enhance the aesthetics of a scheme • Straight lines of linear drainage can be incorporated into the overall design CONTROL OF SPILLAGE • Allows total control of unwanted liquids in an emergency END USER COMFORT • Eliminates false falls and consequent ‘roller coaster’ effect for vehicular traffic associated with point drainage • Level surface offers greater comfort to pedestrians
BEANY® BLOCK COST BREAKDOWN
NOTE: All rates taken from recent tender documents
DESCRIPTION POINT DRAINAGE VS BIRCO Example: A service yard with an area of 100m x 60m with
QUANTITY
UNIT
RATE(£)
TOTAL(£)
100
m
52
5,200
Beany® Block
a crossfall of 1 in 60 to suit either point drainage or linear
(Standard top and base)
drainage located centrally as indicated. No longitudinal fall is
Outfall Type 1
1
No.
200
200
to be allowed.
Access Cover
1
No.
82
82
TOTAL
POINT DRAINAGE DESCRIPTION
QUANTITY
UNIT
RATE(£)
TOTAL(£)
Gullies
32
No.
150
4,800
225mm dia. Pipework
180
m
50
9,000
150mm dia. Pipework
340
m
35
11,900
4
No.
600
2,400
£5,482
COST SAVING USING BEANY® BLOCK, (RATHER THAN POINT DRAINAGE) = 18%
POINT DRAINAGE V MAX-E-CHANNEL Example: A supermarket car park with an area of 100m x 60m with a crossfall of 1 in 60 to suit either point drainage or linear
Manholes
TOTAL
drainage located centrally. Longitudinal fall is to be 1 in 200.
£28,100
BIRCO LINEAR DRAINAGE DESCRIPTION
COST COMPARISON
COST COMPARISON
POINT DRAINAGE COST BREAKDOWN
QUANTITY
UNIT
RATE(£)
Birco 100
100
m
60
6,000
225mm dia. Pipework
85
m
50
4,250
Outfall Units
2
m
250
500
Manholes
2
No.
600
1,200
TOTAL
TOTAL(£)
£11,950
DESCRIPTION
QUANTITY
UNIT
RATE(£)
TOTAL(£)
Gullies
32
No.
150
4,800
225mm dia. Pipework
180
m
50
9,000
150mm dia. Pipework
340
m
35
11,900
4
No.
600
Manholes
COST SAVING USING BIRCO, (RATHER THAN POINT
TOTAL
2,400 £28,100
DRAINAGE) = 60%
CONVENTIONAL DRAINAGE COST BREAKDOWN USING RECENT FIGURES
MAX-E-CHANNEL DRAINAGE COST BREAKDOWN DESCRIPTION Max-E-Channel Outfall Units
QUANTITY
UNIT
RATE(£)
TOTAL(£)
100
m
100*
10,000
2
No.
250 TOTAL
DESCRIPTION
QUANTITY
UNIT
RATE(£)
100
m
9.25
925
100
No.
43.50
4,356
Gullies
2
No.
150
300
Gullies Connection
20
No.
22
440
(Depth not exceeding 2m)
0.67
No.
650
435
Footway**
20
M2
12
240
Kerbs (125 x 255mm)
TOTAL(£)
225 dia. S.W.D (Depth to invert 1.5m)
500 £10,500
* Fully installed cost per metre assuming plain concrete top unit and Base 365 COST SAVING USING MAX-E-CHANNEL , (RATHER THAN POINT DRAINAGE) = 62%
INTRODUCTION
POINT DRAINAGE V BEANY® BLOCK Example: 100-metre length of the road with crossfall and gullies at 15-metre spacing
Manholes*
TOTAL
£6,696
* Manholes @ 150m intervals ** Savings of 20m2 (0.2 x 100) of footpath due to Beany® being wider than kerb 9
SELECTION PROCESS
SELECTION PROCESS LINEAR DRAINAGE PRODUCT SELECTION PROCEDURE The following pages describe the procedure for choosing the most appropriate Marshalls linear drainage system for a particular application. Marshalls’ comprehensive range of drainage systems can be split into three categories; 1. Combined Kerb and Drainage systems specifically designed for kerbside use; •
Beany Block
•
Mini Beany
2. Slot Drainage Systems designed primarily (though not exclusively) for non-kerbside use; •
Max-E-Channel
•
Marshalls Slot Drain
•
Traffic Drain
•
Landscape Drain
3. Grid Drainage Systems designed primarily (though not exclusively) for non-kerbside use; •
Birco
The position of outfall, the area to be drained, topography and rainfall intensity will each affect the final decision as to which is the most appropriate system. However, there are two fundamental factors which, more than any other, determine which system is most appropriate; • Location( i.e. kerbside or non-kerbside) • Capacity
INTRODUCTION
Beany Block* Kerbside
Combined Kerb & Drainage Systems
high
Capacity medium
Mini Beany*
Linear Drainage
Location Max-E-Channel high
Non-kerbside/ Channel
Slot Drainage & Grid Systems
Capacity medium
* Slot Drainage and Grid System can also be used in kerbside locations. Where this is the case follow the design procedure for nonkerbside/ channel drainage
Fig. 3 General Principles for Selecting the Appropriate System
10
Birco 200 & 300
Birco Lite/Birco 100/Birco 150/ Landscape Drain/ Traffic Drain/ Slot Drain
EXAMPLE 2
Marshalls manufactures two types of combined kerb
Alternatively, for a combined kerb and drainage system, with
and drainage systems specifically designed for kerbside
a gradient of 1 in 500 and a peak discharge of 175 l/s,
applications;
then Fig. 4 indicates that Beany Block will be required. Refer
•
Beany Block
to the Beany Block section, page 21, to determine the
•
Mini Beany
appropriate system.
SELECTION PROCESS
COMBINED KERB AND DRAINAGE SYSTEMS
SELECTION PROCEDURE The key deciding factor as to which combined kerb and drainage system to specify will often be flow capacity. The following procedure and graph can be used to determine which of the two Marshalls systems is most appropriate: Step 1
Determine gradient of the system
Step 2
Determine peak flow in the system
Step 3
Refer to graph Fig. 4 (below) to determine which is the most appropriate system
EXAMPLE 1 For a combined kerb and drainage system, with a gradient of 1 in 100, where the calculated peak discharged is 54l/s. Fig. 3 shows that Mini Beany has a capacity of 66 l/s at a gradient of 1 in 100. Refer to the Mini Beany section, page 41, to determine which of the Mini Beany systems to specify.
INTRODUCTION
&LOW2ATELA
"EANY"LOCK
-INI"EANY
%XAMPLE %XAMPLE
'RADIENTIN Fig. 4 Mini Beany and Beany Block flow capacities
11
SELECTION PROCESS
SELECTION PROCESS CHANNEL DRAINAGE SYSTEMS
Step 4
Five channel linear drainage systems are available from
If the channel length is well in excess of 60m, refer
Marshalls, designed primarily (though not exclusively) for
to the Max-E-Channel range page 59 and Birco 300
non-kerbside applications;
page 101. Choose either a large capacity system with few
• • • • •
Max-E-Channel High Capacity Linear Drainage System
outfalls or a medium capacity system with more outfalls
Birco Linear Drainage System
(See note 2).
Landscape Drain Slot Drain
Step 5
Traffic Drain
Determine the load classification of the channel system’s application and specify the appropriate grating or top unit (See note 3).
SELECTION PROCEDURE The choice of channel drainage system will often be determined by site parameters, such as size of area to be
IN ADDITION TO THE ABOVE, THE FOLLOWING FACTORS
drained, existing levels and length of drainage runs. The
SHOULD ALSO BE CONSIDERED:
following steps should be followed to establish the most LOCATION OF EXISTING MAIN DRAINAGE
appropriate Marshalls channel.
•
If the location of the existing drainage system is fixed, it
Step 1
will determine outfall locations and optimum design of
Determine the location of the channel drainage system
the linear drainage system may not be possible
within the drained area. OUTFALL PIPE CAPACITY Step 2
•
Determine the length of run of the channel.
Whatever linear drainage system is used, the outfall pipework must be designed to accommodate the peak discharge from the system
Step 3 If the channel length is approx 60m, refer to Birco 100, Birco
INTRODUCTION
Lite or Landscape Drain. Refer to page 101 (See note 1).
Approx 60m
Location
Birco Lite, 100, 150, 200 Landscape Drain Traffic Drain, Slot Drain
Determine appropriate grating load classification See Note 3
See Note 1
Determine length of run channel
Medium capacity systems with multiple Outfalls See Note 2
Well over 60m High capacity systems with few Outfalls See Note 3
Birco Lite, 100, 150, Landscape Drain Slot Drain
Max-E-Channel or Birco 200, 300
Determine appropriate grating load classification See Note 3
Determine appropriate grating load classification
Fig 5. Summary of General Principles for Selecting an Appropriate Marshalls’ Channel System
12
See Note 3
This example shows typically two Birco Lite, 100 or
1) Generally, where the linear drainage channel length is
Landscape Drain runs utilising in-built fall channels, with
in the order of 60m, one centrally located outfall will be
four outfalls discharging into a carrier pipe system. This
sufficient and a medium capacity system such as Birco
is a highly cost-effective solution and would result in
Lite, Landscape Drain or Birco 100 can be used.
considerable savings compared to an alternative point drainage solution.
Example A relatively small paved area of dimensions 50 x 50m can
3) The loading classifications, as defined in BS EN 1433: 2002
be easily drained by a 100mm wide channel system such
‘Drainage channels for vehicular and pedestrian areas
as Birco Lite, Landscape Drain or Birco 100. One centrally
- classification, design and testing requirements, marking
located outfall to suit the existing main drainage system
and quality control, are as follows;
SELECTION PROCESS
NOTES
will be sufficient. Class A15
Areas which can only be used by pedestrians and pedal cyclists
2) Where linear drainage channel runs are well in excess of 60m, say 200m, then there is a choice of 2 options; Class B125
Footways, pedestrian areas and compatible areas, private car parks or parking decks
Option 1 - a high capacity system (Max-E-Channel or Birco 300) with few outfalls or, alternatively; Class C250
Kerbside and non-trafficked areas of hard
Option 2 - a medium capacity system (eg Birco 100) with
shoulder that extend to a maximum of
multiple outfalls
0.5m into the trafficked area Class D400
Example
Carriageways of roads, hard shoulders and parking areas for all vehicles
For a paved area of dimensions 200 x 150m, then the options are as follows; Class E600
Areas subject to high wheel loads e.g. ports and docksides
Option 1 Class F900
Areas subject to especially high wheel
Fig. 6 High Capacity System with Few Outfalls
This example shows Marshalls’ Max-E-Channel or Birco 300 draining the area with only one outfall at the end of the channel run. Less carrier pipes are used, resulting
INTRODUCTION
loads e.g. aircraft pavements
in even greater cost savings. There will also be less excavation with this design. Option 2
Fig.7 Medium Capacity System with Multiple Outfalls
13
DESIGN PRINCIPLES
DESIGN PRINCIPLES INTRODUCTION The basis of hydraulic design of any linear drainage system
•
is fundamentally like any other engineering analysis; an
50mm/hr (0.014 l/m²/s) Car parks, pedestrian areas, roads or highways
assessment is made of the required performance level that
•
40mm/hr (0.011 l/m²/s) Service yards
the element has to achieve and this is compared to the
•
30mm/hr (0.008 l/m²/s) Large storage areas such as ports
element’s ability to accommodate this. In the case of linear drainage, how much water (peak run-off) will be flowing
In addition, this method of peak run-off determination should
down the channel compared to the maximum stated flow
be limited to use when designing relatively small drained
capacity of the channel for the given conditions without
areas (less than 10,000m²) and when designing relatively
causing any problems such as flooding.
short runs of linear drainage (less than 200m).
There are therefore two elements to any linear drainage design; a determination of the peak run-off or maximum flow along and out of the channel and a determination of the system’s maximum capacity.
THE MODIFIED RATIONAL METHOD The Modified Rational Method (often referred to as The Wallingford Procedure) is considered more accurate for larger schemes with longer drainage runs. Whilst the method
PEAK RUN-OFF
generally assumes that the whole drained area contributes
The determination of peak run-off will depend upon many
to the peak run-off, it uses typical storm profiles based upon
considerations including;
actual data and takes into account actual geographical
•
Size and location of the drained area
rainfall variations. In this way, the critical rainfall intensity for
•
Use and application of the drained area
a given set of parameters and conditions can be calculated.
•
Chosen or calculated rainfall intensity
The only decision that a designer makes is to choose a storm return period. Again several factors will influence this choice
Whilst several methods of calculating the peak storm water
but periods of between 1 in one year to 1 in two years are
run-off exist, there are two which [Marshalls recommend]
typical for designing the linear drainage systems for most
should be considered when designing linear drainage
applications with only more onerous designs considering a 1
systems;
in five years return period. Reference can be made to
•
The Simple Area Run-Off Method
BS EN 752 for advice on the choice of return period and the
•
The Modified Rational Method (often referred to as
Modified Rational Method document advises “time of entry”
The Wallingford Procedure)
for chosen return period.
THE SIMPLE AREA RUN-OFF METHOD
INTRODUCTION
In the Simple Area Run-Off Method, it is assumed that the whole of the drained area contributes to the peak flow, that the rainfall intensity is uniform over the whole area and additionally that a value for the rainfall intensity is actually assumed. Therefore the assumed value for rainfall intensity is directly proportional to the peak run-off. A balance is often made between cost and the level of performance required but it is generally accepted that this method will yield conservative results. The peak run-off formula used in this method is:-
Analysis of water flow along a linear drainage system where water continuously enters the system laterally is complex and differs in some respects to flow in circular pipes. It is usual to assume that flow in pipes is uniform or steady as the “flow in” equates to the “flow out” and that as the parameters along the system will generally remain unchanged, the flow is essentially unaltered. For these conditions, flow capacity has been determined from traditional methods such as the Colebrook-White formulae.
Q = A x i/3600, where
Where continuous lateral inflow is involved and particularly
Q is the peak storm water run-off (in litres per second)
where large flows for large drained areas are concerned, a
A is the drained area (in square metres)
steady flow state may not be achieved and an alternative
“i” is the rainfall intensity (in millimetres per hour)
to steady state flow capacity determination may need to be
Some typical values assumed for rainfall intensity are given
14
MAXIMUM SYSTEM CAPACITY
considered.
below. Engineers and designers must choose carefully and
Recent research work carried out at HR Wallingford has
give due consideration to the performance level required;
considered this aspect of Marshalls’ linear drainage systems.
•
75mm/hr (0.021 l/m²/s) Areas where the consequences
The principle of spatially variable flow was established
of flooding is serious such as where roof drainage [or
where, particularly for shallow gradients, the position of
entrances to buildings] is involved
peak depth and hence the critical location moves from the
varies, an equivalent uniform gradient may be derived from
of the run. The research work confirmed that for Marshalls’
the HA advice note HA37. Specific advice on the application
Beany Block system, where flow-capacities have traditionally
of this for Marshalls’ linear drainage or combined kerb and
been calculated using Colebrook-White, for all practical
drainage systems is available upon request.
applications the capacities quoted were realistic and accurate. However, Colebrook-White gave very conservative figures for shallow gradients or flat applications and more cost-effective designs can be completed using data derived from the HR Wallingford work. The theory and practical application of flat channel flow is confirmed in TRL Report 602. Flow data contained in the Marshalls Drainage Design Guide are derived from both HR Wallingford research and from traditional methods. Each system’s data will indicate its source.
CROSS FALLS AND DRAINED WIDTHS
DESIGN PRINCIPLES
assumed location at the outfall upstream towards the head
Generally, cross falls should be between 1 in 40 to 1 in 80 whilst the maximum drained distance to any linear drainage should typically not exceed 50m. OUTFALLS As indicated the location of outfalls is sometimes not determined by the hydraulic design. Where the choice of outfall location is within the designer’s control, and particularly where long drainage runs are being designed, the capacity of the outfall pipe work can sometimes limit
In addition to flow capacity figures, velocity data is also
the efficiency of the system. Capacity figures for Marshalls’
included. The velocity data has been determined by dividing
outfalls are given in the appropriate sections. These figures
the appropriate flow capacity by the full cross section area
are based upon theoretical but conservative calculations.
for the section under consideration. For Colebrook-White
Details are available upon request.
derived flows, this is accurate; for HR Wallingford derived flows this is conservative. DESIGN CAPACITIES When using inbuilt fall Channels exclusively or in combination with flat invert Channels, drainage capacities should be calculated at the nearest upstream prime invert depth Channel. OTHER CONSIDERATIONS There are other aspects of linear drainage design beyond the
MAINTENANCE All surface water collection and transport systems will require maintenance to ensure efficient performance. Where linear drainage is designed for shallow gradients due care must be taken in the design for the effects of silting. Many systems are kept free from silting by the action of fast flow, but HR
INTRODUCTION
factors given above. These include:
Wallingford’s research confirmed that velocities flows as low as 0.4m/s “caused silt to move”. EXISTING DRAINAGE The location of existing drainage systems may often determine the location of the linear drainage outfall. This may or may not coincide with the most cost effective or efficient linear drainage design. GROUND LEVELS Existing ground levels will determine low points and gradients, particularly so for roads and highways. This can mean that outfall locations are not determined by the hydraulic design. Where the channel longitudinal gradients
15
DESIGN PRINCIPLES
DESIGN PRINCIPLES DRAINAGE ARRANGEMENTS Due to the manufacturing flexibility available to Marshalls, we
Inbuilt fall Channels are available as follows:
are able to offer several of our linear drainage and combined kerb and drainage systems with pre-sloped or inbuilt fall channels or base units.
CHANNEL TYPE
TYPE
FALL
UNITS PER SET
Birco Lite
1% 10 mm/1000 mm channel 15 no.
The inherent flexibility of inbuilt fall systems gives the
Birco 100
1% 10 mm/1000 mm channel 20 no.
designer a number of options to increase the flow capacity of
Birco 150
the drainage run as circumstances dictate:
Birco 200
5 mm/1000 mm channel
20 no.
•
Landscape Drain
1% 10mm/1000 mm channel
20 no.
Marshalls Slot Drain
1% 10 mm/1000 mm channel 20 no.
Mini Beany
1% 10 mm/1000 mm channel 20 no.
Traffic Drain
1% 10 mm/1000 mm channel 20 no.
Constant depth invert channels can be laid flat, or to a slope to increase the flow and discharge capacity (Figs. 8 & 9 opposite).
•
Channels with progressively deeper inverts can be introduced towards the outfall end forming a stepped construction. Again the slope will increase flow and
1% 10 mm/1000 mm channel 20 no. 0.5%
discharge capacity (Figs. 10 & 11 opposite). •
Channels with inbuilt falls can be used (Fig. 12 opposite).
INBUILT FALLS Mini Beany, Traffic Drain, Landscape Drain, Slot Drain and Birco are all available with inbuilt falls. Inbuilt fall Channels increase drainage discharge capacity by improving flow rates and thereby increasing the overall discharge capacity of the system. Channels with inbuilt falls have benefits in a number of specific applications: •
In flat areas, such as supermarket car parks, where pavement falls must be minimised to prevent “runaway trolley” syndrome
•
Adjacent to buildings where architectural detail dictates
•
To maintain a level pavement adjacent to internal flooring
PRIME INCREMENTAL DEPTH A set of 20 No. inbuilt fall channels* take the system from the shallowest to the deepest constant depth channel in increments. For most of the Birco systems (Lite, 100 and 150), Mini Beany, Traffic Drain, Landscape Drain and Marshalls Slot Drain, the increment is 10mm per metre long channel (1%). For Birco 200, the increment is 5mm per metre long channel (0.5%). These increments correspond to the various constant depth or invert channels “prime depths” of 0/0, 5/0, 10/0, 15/0 and 20/0 (or 185, 235, 285, 335 and 385 for Mini Beany and Traffic Drain) every 5 linear metres (Fig. 16 opposite). * Birco Lite 15 only
that pavement level is parallel to roof level
INTRODUCTION
in warehouse areas •
Where insufficient fall is present, inbuilt fall Channels allow the creation of an artificial valley with either a gully at the centre or at each end of a drainage run (Figs. 13 & 14 opposite)
Inbuilt fall Channels are designed as a 20 Channel set (20 linear metres)* but are manufactured individually and can be ordered in any permutation. They can be laid in virtually any given length in combination with constant depth invert Channels (Fig. 16 opposite). Inbuilt fall channels may also be laid to a gradient to increase the invert slope and flow capacity. * Birco Lite 15 only
16
Note: Drawings show exaggerated fall for illustrative purposes only (not to scale)
Fig.9 Constant depth invert Channels, laid on sloping ground
DESIGN PRINCIPLES
Fig.8 Constant depth invert Channels, laid to level ground
Fig.10 Channels laid to a stepped construction laid to level ground
Fig.11 Stepped constant depth channels laid on sloping ground
Fig.12 Inbuilt fall Channels, laid on level ground
Fig.13 Artificial valley with Outfall at the centre, laid on level ground
Fig.14 Artificial valley with Outfalls at each end, laid on level ground
INTRODUCTION
Fig.15 Combination of constant depth invert Channels and inbuilt fall Channels
•
Fig.16 5 prime depth Channels laid with a full set of inbuilt fall Channels
17
GENERAL CONSTRUCTION
GENERAL CONSTRUCTION
CAST IRON
MANUAL HANDLING
CAST IRON
As a substance, cured concrete is non-hazardous; however
Throughout this Design Guide reference is made to cast iron
it is heavy, hard and abrasive. Manual handling of these
as a generic material.
products therefore has associated hazards. Only individuals who have received training in kinetic handling techniques should be allowed to handle these products. Gloves should be worn when handling concrete products to avoid cuts,
Cast iron is available as either ‘grey’ iron (flake graphite) or ‘ductile’ iron (spheroidal graphite). We do not believe that, for the product’s intended use, the material type will affect performance. However, if you wish to know the material type
abrasions and/or skin irritations.
this is given in the specific product data sheet. Marshalls advises that the majority of their drainage components be installed using mechanical handling equipment. Techniques using mechanical handling equipment, such as vacuum machines, have been proven to eliminate manual handling on many sites. Overall project savings have been shown through the benefits of easier, more efficient and less wasteful installation. Suitable equipment is available from Probst Handling and Laying Systems A DVD clearly showing the principles and advantages of using mechanical handling equipment and techniques for the installation of Beany Block is available by contacting the
The coating applied to our cast iron is a temporary bitumen based coating that will become dull and lose its gloss over a period of time. It is not intended to protect the casting in use and would be expected to break down over a short period of time, either through weathering, or by being worn off when trafficked. As this happens the product would be expected to show signs of surface oxidation. From the perspective of long term structural performance, the application of such coatings is not intended to serve any purpose; the corrosion mechanism of cast iron is very different to that of steel and is not detrimental to structural
Marshalls Drainage Design Team.
performance. INCLEMENT WEATHER Installation operations should be discontinued if weather conditions are such that the performance of the inspection
Both grey and ductile iron contain high quantities of silicon, which upon oxidation converts to silica (alongside the iron oxide) producing a tough non-porous homogenous surface
chamber may be jeopardised.
coating. In addition, there is a slight reduction in volume, Installation should not be undertaken when the temperature 0
0
is below 3 C on a falling thermometer and below 1 C on a
causing this coating to bind tightly onto the surface which effectively protects the iron and prevents further oxidation.
rising thermometer. If the area is regularly trafficked, the grates will fairly quickly
INTRODUCTION
COSHH All relevant health and safety information, including COSHH data sheets, can be obtained from Marshalls Advisory Services or Drainage Design Team.
If the area is not regularly trafficked and where aesthetics are important, then galvanised steel, stainless steel or powder coated cast iron gratings (all options that are available) should
PROTECTION All necessary Personal Protective Equipment (PPE) should be worn on site, as the site rules dictate. Goggles, ear protection, dust masks and protective footwear must always be worn whenever cutting operations are undertaken. FOR FURTHER INFORMATION CONTACT Marshalls Advisory Service Tel: 0845 113344 Fax: 01422 312943 e-mail:
[email protected] Drainage Design Team Tel: 0845 3020400 Fax: 0845 3020401 e-mail:
[email protected]
18
polish up to a dark colour.
be considered.
FURTHER INFORMATION
DRAINAGE DESIGN SUPPORT
THE FOLLOWING FURTHER INFORMATION IS AVAILABLE:-
Marshall is committed to ensuring that the right system is selected, detailed, delivered and installed. The understanding
Additional copies of this Design Guide
that the right selection of linear drainage system is crucial
Marshalls Product Selector (2.0) Tel: 0870 241 2463
to the function of any hard landscaped area reinforced
Specific product literature on: • Slot Drain • Landscape Drain • Traffic Drain • Mini Beany
Tel: 0870 241 2463
Marshalls Drainage Products
www.marshalls.co.uk/ drainage
Product Data Sheets
Marshalls Advisory Service Tel: 0845 113344 Fax: 01422 312943 e-mail: advisoryservice @marshalls.co.uk
the need for us to share our knowledge with you. We do not underestimate the importance of the hydraulic design matched to the individual project requirements to give total peace of mind. We offer design support from conception to completion with experienced personnel and proven procedures. To ensure specification of the correct system and components, we offer a free, no-obligation Drainage Design Service. By use of our bespoke computer software the design
Tel: 0870 241 2463
DESIGN SERVICE FURTHER INFORMATION
DESIGN SERVICE
team can plan realistic and rapid solutions to your drainage Drainage Design Team Tel: 0845 3020400 Fax: 0845 3020401 e-mail: drainage@ marshalls.co.uk
needs. THE DESIGN TEAM WILL:Work with the project team to ensure the client’s expectation are met •
COSHH
Operate with either electronic (CAD) or hard copy drawings
•
Assist in the selection of the most appropriate system
•
Provide hydraulic data to support the adequacy of the
•
Provide schedule and / or layouts of the components as
selected system
Drainage Design Team Tel: 0845 3020400 Fax: 0845 3020401 e-mail: drainage@ marshalls.co.uk
appropriate •
Give general advice based on a wealth of knowledge
A team of field based Drainage Engineers is also available to
Contract Information:
support our sales team and offer you technical advice on site
•
or in your office.
•
CONTACT DETAILS:Telephone: 0845 30 20 400 Facsimile: 0845 30 20 401 e-mail:
[email protected]
Marshalls Advisory Service Tel: 0845 113344 Fax: 01422 312943 e-mail: advisoryservice @marshalls.co.uk
• • •
Appendix 5/5 for Combined Kerb and Drainage systems Appendix 5/6 for Linear and Drainage systems Appendix 5/3 for Slot Drainage systems Method of Measurement Contract Schedule
Tel: 0845 3020400 Fax: 0845 3020401 e-mail: drainage@ marshalls.co.uk
INTRODUCTION
•
19
REFERENCES & FURTHER READING
REFERENCES & FURTHER READING 1. BS EN 1433:2002 - Drainage channels for vehicular and
15. HR Wallingford WP6 - Wallingford Procedure for Europe:
pedestrian areas – classification, design, and testing
Best Practice Guide to Urban Drainage Modelling CD ROM
requirements, marking and evaluation of conformity
2001
2. BS EN 206-1:2000 – Concrete. Specification, performance, production and conformity 3. BS 8500-2:2002 - Concrete Complementary British Standard to BS EN 206-1 4. BS EN 998-2 : 2003 - Specification for Mortar for Masonry
16. HR Wallingford SR 581 - Hydraulic Capacity of Drainage Channels with Lateral Inflow 2001 17. HR Wallingford SR 606 - Hydraulic Design of Paved Areas 2002 18. Design of Linear Drainage by Dr. M Naqvi, Thomas Telford publishing 2003
5. BS 7263-3 : 2001 - Precast concrete flags, kerbs, channels, edgings and quadrants
19. The Building Regulations 2002 - Approved Document H3, Section 2, ‘Drainage of Paved Areas’
6. BS EN ISO 1461: 1999 - Hot dip galvanized coatings on fabricated iron and steel articles. Specifications and test methods 7. BS EN 752-1:1996 - Drain and sewer systems outside buildings. Generalities and definitions 8. BS EN 752-2:1997 - Drain and sewer systems outside buildings. Performance requirements 9. BS EN 752-3:1997 - Drain and sewer systems outside buildings. Planning 10. BS EN 752-4:1998 - Drain and sewer systems outside buildings. Hydraulic design and environmental
INTRODUCTION
considerations 11. TRRL Laboratory Report 602 - Drainage of level or nearly level roads 12. Highways Agency’s Design Manual for Roads and Bridges HA 37 - Hydraulic Design of Road-edge Surface Water Channels HA 102 - Spacing of Road Gullies HA 33 - Surface and Sub-surface Drainage Systems For Highways 13. Highways Agency’s Manual of Contract Documents for Highway Works Specification for Highway Works Notes for Guidance on the Specification for Highway Works Highway Construction Details 14. HR Wallingford WP5 - The Wallingford Procedure for the 20
design and analysis of urban storm drainage 1981
20. Building Standards (Scotland) Regulations 1990, Technical Standard M ‘Drainage and Sanitary Facilities’ 21. Sewers for Adoption – 5th Edition
CONTENTS
BEANY ® BLOCK
CONTENTS .................................................................21 COMPONENTS .........................................................22 HYDRAULIC DATA ...................................................24 STANDARD DETAILS ..............................................27 CONSTRUCTION ......................................................36 SPECIFICATION ........................................................39
BEANY ® BLOCK
ITEM CODES ..............................................................40
21
COMPONENTS
COMPONENTS TOP COMPONENTS HB Straight Backed
HB Straight Backed Low Hole
• Half Battered front face • As Straight Backed profile • Kerb upstand 125 -150mm • Straight back to assist with paving up to the • For use with porous back of the unit asphalt or high kerb • Kerb upstand 75-125mm upstand applications
HB Symmetrical
Symmetrical Low Hole
45º Splayed
• Half Battered profile
• As Symmetrical
• Symmetrical to allow top to be rotated to drain from both sides
• Kerb upstand 125 -150mm
• 45º Splayed front face profile
• Kerb upstand 75-125mm
• To match SP kerbs
• For use with porous asphalt or applications requiring high kerb upstand
• Kerb upstand 75-100mm • Straight back to assist with paving up to the back of the unit
BEANY BLOCK BASE COMPONENTS All Base Units, Ancillary items and Transition Units are 500mm long
BASE UNITS Base 205
Base 295
Base 365
Base 630
ANCILLARY ITEMS
BEANY ® BLOCK
Junction For Base 205 & 295
22
Outfall (shown sectioned for illustrative purposes) For Base 205, 295 & 365
Junction/Outfall For Base 205 & 295
COVER PLATES
STOP END TOP UNIT
The Beany Block system has been specifically designed to allow
Stop End Top Blocks are available
for 150mm of cover above the Base Units and Cover Plates. This
right and left handed (RH shown).
permits the use of standard ‘drop’ kerbs at vehicular/pedestrian
They are designed to form the
crossings as well as allowing sufficient road construction
transition from the Beany Block
material, above the protective concrete cover, to avoid possible
system to normal half battered kerbs
damage to the units and plates by heavy traffic.
at pedestrian or vehicular crossings.
45º Splayed Access Cover
A range of Top and Base Units are available to cater for external and internal horizontal curve radii from 50 metres down to 6 metres. Units for smaller radii can be supplied to order. Radius >50 50.0-19.1 19.0-10.8 10.7-7.7 7.6-6.0 Êä
LANDSCAPE DRAIN ref. d i 0/0 270 220 IBF 1-5 280-320* 230-270* 5/0 320 270 IBF 6-10 330-370* 280-320* 10/0 370 320 IBF 11-15 380-420* 330-370* 15/0 420 370 IBF 16-20 430-470* 380-420* 20/0 470 420
LANDSCAPE DRAIN
universal-fit seal and stopper
*-dimensions at downstream end; deduct 10mm for upstream end. All dimensions measured from grating surface, pavement should be 5mm above this level.
95
HYDRAULIC DATA
HYDRAULIC DATA The Landscape Drain hydraulic data stated in the following tables comprises of the flow capacity, in litres per second (l/s) and velocity in metres per second (m/s). This data has been calculated using the Colebrook-White formulae. LANDSCAPE DRAIN Channel Type
0/0
5/0
10/0
15/0
20/0
Gradient “1 in”
l/s
m/s
l/s
m/s
l/s
m/s
l/s
m/s
l/s
m/s
10
27
3.06
46
3.29
64
3.39
84
3.50
103
3.55
20
19
2.16
32
2.32
45
2.40
59
2.47
72
2.51
30
16
1.76
26
1.89
37
1.95
48
2.01
59
2.04
40
14
1.52
23
1.64
32
1.69
42
1.74
51
1.77
50
12
1.36
20
1.46
29
1.51
37
1.56
46
1.58
75
10
1.11
17
1.19
23
1.23
30
1.27
37
1.29
100
9
0.96
14
1.03
20
1.06
26
1.10
32
1.11
150
7
0.78
12
0.84
16
0.87
21
0.89
26
0.91
200
6
0.67
10
0.72
14
0.75
18
0.77
23
0.78
300
5
0.55
8
0.59
11
0.61
15
0.63
18
0.64
400
4
0.47
7
0.51
10
0.53
13
0.54
16
0.55
500
4
0.42
6
0.45
9
0.47
12
0.48
14
0.49
750
3
0.34
5
0.37
7
0.38
9
0.39
12
0.40
1000
3
0.29
4
0.32
6
0.33
8
0.34
10
0.34
1500
2
0.24
4
0.26
5
0.27
7
0.27
8
0.28
2000
2
0.21
3
0.22
4
0.23
6
0.24
7
0.24
Equivalent pipe diameter
120mm
145mm
160mm
175mm
190mm
LANDSCAPE DRAIN
OUTFALL CAPACITIES
96
Outfall Type
Outlet Pipe Diameter (mm)
m/s
l/s
Landscape Drain Inline End Outlet Outfall
100
2.23
11
Landscape Drain Inline Side Outlet Outfall
150
2.39
26
-).##/.#2%4% "%$$).'!.$(!5.#(
35" "!3%
",/#+0!6).' 3!.$"%$
LANDSCAPE DRAIN
,!.$3#!0%$2!). 490)#!,#/.3425#4)/.$%4!),3
3ECTION4HROUGH,ANDSCAPE$RAIN#HANNEL ,OAD#LASSUPTO#
35" "!3%
0!6).'&,!'3 -/24!2"%$
$ISH
-).##/.#2%4% "%$$).'!.$(!5.#(
- &,%83%!,!.4
2%-/6!",%0,5'&/22/$$).' !##%334/0)0%#/..%#4)/.
,!.$3#!0%$2!).4/05.)43"%$$%$/.4/#(!..%,53).' ---/24!2#,!33-4/"3%.
).6%244/352&!#%
,ANDSCAPE$RAIN )NLINE3IDE/UTFALL ,OAD#LASSUPTO#
#,!33-4/"3%.
STANDARD DETAILS
4/352&!#%/&!##%33#/6%2
,!.$3#!0%$2!).#!34)2/.!##%33#/6%2 "%$$%$/.4/#(!..%,53).'---/24!2
STANDARD DETAILS
97
CONSTRUCTION
CONSTRUCTION INTRODUCTION Installation of the Marshalls’ Landscape Drain System should be carried out in accordance with the Specification and Standard Detail Sheets. The following method of installation is recommended. EXCAVATION Sufficient material should be excavated to accommodate the drainage channels, concrete bedding and haunching, any ‘soft spots’ or poorly compacted formation should be made good. The top of the Landscape Drain shall be 5mm below the final pavement surface. Channels and outfall units shall be bedded directly onto a freshly mixed concrete foundation as shown in the Landscape Drain Standard Detail Sheets, or alternatively bedded on a layer of Mortar Class 12 to BS EN 998-2:2003 not less than 10mm and not more than 40mm thick on a previously prepared concrete foundation.
LANDSCAPE DRAIN
CHANNELS Unless otherwise agreed, Channel Units shall be laid commencing at the outfall to previously established line and level. Setting out pins should be accurately located, with a string line level with the top of the drainage channels. Pins can be located to the rear of the channels to avoid having to lift components over the string line. Channel ends should abut as tightly as possible. The invert and surface levels of adjacent channels shall correspond. Any units deviating more than 3mm in 3m from line and level shall be made good by lifting and relaying. Where cutting of Landscape Drain Channel Units is required, they shall be cut with a concrete saw or disc cutter, so that no single unit is less than 350mm long. Landscape Drain units shall not be cut unless directed by the Engineer. In situ concrete haunching shall not be placed until the installed units have been inspected and approved by the Engineer. The concrete haunching shall be of a concrete grade appropriate to the Drainage Channel Loading Class as specified in the contract or the Landscape Drain Standard Detail Sheets. Haunching shall be carried out as one operation to a complete line of Channel Units, to the dimensions indicated in the Landscape Drain Standard Detail sheets. Haunching / surround concrete to the Outfall Unit shall be of the same grade as the adjacent Channel Unit haunching in accordance with the Landscape Drain Standard detail sheets. Where channels are laid on or adjacent to existing or proposed concrete slabs, transverse joints shall be formed within the units and haunching adjacent to the slab joints. Longitudinal movement joints shall also be formed between the haunching and the slabs as described in the contract and in accordance with Landscape Drain Standard Detail Sheets. 98
OUTFALLS Outfall Units shall be of the type specified in the contract and constructed as shown in the Landscape Drain Standard Detail Sheets. Unless otherwise described in the contract, they shall be bedded on and surrounded by 150mm of concrete of the appropriate grade. A suitable section of the wall of the outfall unit shall be cut out to allow adjacent drainage channels to abut without restricting the flow of water. Cutting shall be achieved by using a concrete saw or disc cutter. The horizontal joints between the sections of the outfall units shall be sealed with M-Flex sealant. The appropriate pipe adaptor shall be placed in the aperture for connection to the underground pipework. JOINT SEALANT Jointing of adjacent channels shall be carried prior to fixing the gratings. Marshalls’ M-Flex sealant should be gunned into the sealant groove formed when adjacent channels abut. Surplus sealant shall be removed from the inner surface of the units as work proceeds. M-Flex shall also be used to seal the vertical joint between top units, to prevent any migration of adjacent laying course material. One tube of M-Flex is sufficient to seal the following:M-FLEX REQUIREMENT Base Type
Channels Per Tube
0/0
22
5/0
16
10/0
13
15/0
11
20/0
9
LANDSCAPE DRAIN TOP UNITS Adjacent Carriageway and/or footway construction shall not be commenced within 3 days of any jointing or haunching/ surrounding concrete being placed. Unless agreed with the specifier, Landscape Drain Top Units shall be bedded securely on to channel units with Mortar Class 12 to BS EN 998-2:2003 as stated in the Landscape Drain Standard Detail Sheets. On completion of the works, the drainage channel units shall be cleaned out and left free from obstruction. This shall be carried out either by removal of gratings or by high pressure water jetting (100-150 bar at 200 litres/min minimum). Unless otherwise agreed with the specifier, the slot openings shall be covered by timber boards or other method during jetting operations. Outfall units shall be emptied. The cleaning process should be repeated where necessary on completion of any remedial works.
INTRODUCTION The following specification covers the complete Marshalls’ Landscape Drain Linear Drainage System including ancillary fittings and is compatible with the Standard Detail Sheets.
SPECIFICATION
SPECIFICATION
MARSHALLS LANDSCAPE DRAIN 1. The linear drainage system shall be Landscape Drain, manufactured in pre-cast concrete, with the exception of certain fitments manufactured in cast iron or formed in stone, as supplied by Marshalls, Halifax HX5 9HT in accordance with Standard Detail Sheets. 2. The linear drainage shall be a two part system consisting of dished and slotted Top Units bedded onto precast concrete drainage channels that are 160/210/260/310/360mm* deep together with drainage channels that have 1% inbuilt fall. *The overall width of the system shall be not less that 200mm. 3. All components of the Landscape Drain System, shall comply with Load Classification C250 in accordance with BS EN 1433:2002 and the following: (i) The Top Units shall be formed in precast concrete/natural Yorkstone/ granite* (ii) The Top Units shall be Conservation Top/Keyblok Brindle/Keyblok Burnt Ochre/Keyblok Red/Keyblok Buff/ Keyblok Grey/Keyblok Charcoal/Tegula Brindle/Tegula Burnt Ochre/Tegula Charcoal/Tegula Buff/Yorkstone Scoutmoor/ Yorkstone Highmoor/Granite Silver Grey/Granite Light Pink/ Granite Light Beige/Granite Mid Grey/Granite Pink* (iii) The system shall have a minimum of 5,280mm²/m (iv) The drainage channels shall have an invert width of 100mm (v) The Top Units shall be mortar bedded onto the drainage channel using a Mortar class 12 to BS EN 998-1 4. The linear drainage system comprising top units, constant depth and inbuilt fall channels, outfalls, access covers, end caps, cap outlets, and sealants shall be installed to the line and levels indicated in the contract documents and
LANDSCAPE DRAIN
water inlet aperture area
in accordance with the manufacturer’s instructions and Standard Details. Note: * delete as required
99
LANDSCAPE DRAIN
ITEM CODES
ITEM CODES Tops
Weight* (kg) Keyblok Top 125mm Grey 48 Keyblok Top 125mm Charcoal 48 Keyblok Top 125mm Red 48 Keyblok Top 125mm Brindle 48 Keyblok Top 125mm Buff 48 Keyblok Top 125mm Burnt Ochre 48 Conservation Top 125mm Silver Grey 48 Tegula Top 125mm B/Ochre 48 Tegula Top 125mm Brindle 48 Tegula Top 125mm Buff 48 Tegula Top 125mm Charcoal 48 Yorkstone Top ☎ Granite Top ☎ * Weight per metre, individual weight is 6 kg
Base Channels Landscape Channel 0/0 1000mm Landscape Channel 5/0 1000mm Landscape Channel 10/0 1000mm Landscape Channel 15/0 1000mm Landscape Channel 20/0 1000mm Landscape IBF Channel No.1 Landscape IBF Channel No.2 Landscape IBF Channel No.3 Landscape IBF Channel No.4 Landscape IBF Channel No.5 Landscape IBF Channel No.6 Landscape IBF Channel No.7 Landscape IBF Channel No.8 Landscape IBF Channel No.9 Landscape IBF Channel No.10 Landscape IBF Channel No.11 Landscape IBF Channel No.12 Landscape IBF Channel No.13 Landscape IBF Channel No.14 Landscape IBF Channel No.15 Landscape IBF Channel No.16 Landscape IBF Channel No.17 Landscape IBF Channel No.18 Landscape IBF Channel No.19 Landscape IBF Channel No.20 Access Cover Landscape Drain Access Cover Outfalls Landscape Outfall 100mm End Landscape Outfall 150mm Side End Caps and Cap Outlets End Caps 100 End Cap 0/0 100 End Cap 5/0 100 End Cap 10/0 100 End Cap 15/0 100 End Cap 20/0 Cap Outlets 100 Cap Outlet 0/0 100 Cap Outlet 5/0 100 Cap Outlet 10/0 100 Cap Outlet 15/0 100 Cap Outlet 20/0
CONTACT DETAILS:Telephone: 0845 30 20 400 Facsimile: 0845 30 20 401 e-mail:
[email protected]
100
Weight (kg) 52 64 76 88 100 53 55 58 60 63 65 67 70 72 75 77 79 82 84 87 89 91 94 96 99 Weight (kg) 29 Weight (kg) 104 142 Weight (kg) 1.0 1.2 1.4 1.6 1.8 1.0 1.2 1.4 1.6 1.8
Item Code DR5150300 DR5150400 DR5150500 DR5150600 DR5150800 DR5150900 DR5150700 DR5170900 DR5170600 DR5170800 DR5170400
☎ ☎ Item Code DR3206100 DR3206200 DR3206300 DR3206400 DR3206500 DR3300100 DR3300200 DR3300300 DR3300400 DR3300500 DR3300600 DR3300700 DR3300800 DR3300900 DR3301000 DR3301100 DR3301200 DR3301300 DR3301400 DR3301500 DR3301600 DR3301700 DR3301800 DR3301900 DR3302000 Item Code DR5151400 Item Code DR3556700 DR3556750 Item Code DR1251500 DR1251550 DR1251600 DR1251650 DR1251700 DR1251750 DR1251800 DR1251850 DR1251900 DR1251950
CONTENTS .............................................................. 101
CONTENTS
BIRCO
COMPONENTS ...................................................... 102 HYDRAULIC DATA ................................................ 109 STANDARD DETAILS ........................................... 112 CONSTRUCTION ................................................... 116 SPECIFICATION ..................................................... 117
BIRCO
ITEM CODES ........................................................... 118
101
COMPONENTS
COMPONENTS BIRCO LITE
BIRCO 100
GRID SYSTEM
GRID SYSTEM
100 Galvanised Grating 20 x 30mm mesh
Lite Galvanised Grating 30 x 15mm mesh
100 Galvanised Grating 30 x 12mm mesh
Lite Galvanised Grating 30 x 30mm mesh
100 Galvanised Grating 30 x 30mm mesh 100 'Heelsure' Cast Iron Grating 100 x 6mm slots (2 pieces shown)
Lite 'Heelsure' Cast Iron Grating 100 x 6mm slots (2 pieces shown)
100 Cast Iron Grating 100 x 12mm slots (2 pieces shown)
Lite Cast Iron Grating 100 x 12mm slots (2 pieces shown)
100 Cap Outlet 110mm O.D.
100 Channel 5 Constant Depth Inverts
Lite Cap Outlet 110mm O.D. Lite Channel 4 Constant Depth Inverts supplied with locking bars Lite T Junction Channel 3 Constant Depth Inverts Supplied with locking bar
Lite End Cap
INBUILT FALLS AVAILABLE 15 Inbuilt Fall Channels, with a gradient of 1%
100 T Junction Channel 3 Constant Depth Inverts
100 End Cap
INBUILT FALLS 20 Inbuilt Fall Channels, with a gradient of 1%
D
I
D
I
BIRCO
ref. 0/0 IBF 1-5* 5/0 IBF 6-10* 10/0 IBF 11-15* 15/0 IBF 16-20* 20/0
102
BIRCO LITE d i 170 120 180-220* 130-170* 220 170 230-270* 180-220* 270 220 280-320* 230-270* 320 270 -
*-dimensions at downstream end; deduct 10mm for upstream end. All dimensions measured from grating surface, pavement should be 5mm above this level.
ref. 0/0 IBF 1-5* 5/0 IBF 6-10* 10/0 IBF 11-15* 15/0 IBF 16-20* 20/0
BIRCO 100 d i 180 130 190-230* 140-180* 230 180 240-280* 190-230* 280 230 290-330* 240-280* 330 280 340-380* 290-330* 380 330
*-dimensions at downstream end; deduct 10mm for upstream end.. All dimensions measured from grating surface, pavement should be 5mm above this level.
BIRCO 200
GRID SYSTEM
GRID SYSTEM 150 Galvanised Grating 20 x 30mm mesh
200 Galvanised Grating 20 x 30mm mesh
150 Cast Iron Grating 150 x 12mm slots (2 pieces shown)
COMPONENTS
BIRCO 150
200 Cast Iron Grating 200 x 18mm slots (2 pieces shown)
150 Cap Outlet 158mm O.D.
200 Channel 4 Constant Depth Inverts
150 Channel 5 Constant Depth Inverts
150 T Junction Channel 3 Constant Depth Inverts
200 T Junction Channel 1 Constant Depth Invert
200 End Cap
150 End Cap
INBUILT FALLS 20 Inbuilt Fall Channel, with a gradient 0.5%
INBUILT FALLS 20 Inbuilt Fall Channels, with a gradient of 1%
ref. 0/0 IBF 1-5* 5/0 IBF 6-10* 10/0 IBF 11-15* 15/0 IBF 16-20* 20/0
BIRCO 150 d i 230 180 240-280* 190-230* 280 230 290-330* 240-280* 330 280 340-380* 290-330* 380 330 390-430* 340-380* 430 380
*-dimensions at downstream end; deduct 10mm for upstream end. All dimensions measured from grating surface, pavement should be 5mm above this level.
ref. 0/0 IBF 1-5* 5/0 IBF 6-10* 10/0 IBF 11-15* 15/0 IBF 16-20* 20/0
BIRCO
D
D
I
I
BIRCO 200 d i 310 240 245-265+ 315-335+ 335 265 + 270-290+ 340-360 360 290 295-315+ 365-385+ 385 315 320-340+ 390-410+ -
*-dimensions at downstream end; deduct 5mm for upstream end. All dimensions measured from grating surface, pavement should be 5mm above this level.
103
COMPONENTS
COMPONENTS BIRCO 300
BIRCO SHALLOW
GRID SYSTEM
GRID SYSTEM
300 Cast Iron Grating 125 x 20mm slots (2 pieces shown)
300 Cap Outlet 308mm O.D.
300 Channel Constant Depth Invert BIRCO 100 SHALLOW
BIRCO 150 SHALLOW
BIRCO 200 SHALLOW
BIRCO 300 SHALLOW
300 End Cap
D
I
i 395
All dimensions are measured from the grating surface, pavement should be 5mm above this level.
D
D
I
I
BIRCO 300 d 470
ref. DR3805000
CONTACT DETAILS:Telephone: 0845 30 20 400
BIRCO
Facsimile: 0845 30 20 401 e-mail:
[email protected]
BIRCO 100 SHALLOW ref. d i DR4204500 80 50 DR4204600 100 70 DR4204800 150 110 DR4204900 200
BIRCO 150 SHALLOW ref. d i DR4304600 120 80 DR4304700 150 110 DR4304800 200 160
160
BIRCO 200 SHALLOW ref. d i DR4404700 150 90 DR4404800 200 140 DR4404900 250 190
I D
D
I
BIRCO 300 SHALLOW ref. d i DR4504700 200 125 DR4504900 300 225
All dimensions measured from grating surface, pavement should be 5mm above this level.
104
COMPONENTS
BIRCO OUTFALLS INLINE OUTFALLS & JUNCTION OUTFALLS - FOR DEPTH TO INVERT SEE PAGE 113 BIRCO LITE
BIRCO 100
BIRCO 150
For 150mm dia pipe
BIRCO 200
For 150mm dia pipe For 150mm dia pipe
For 150mm dia pipe 100 In-line Outfall 150 Side Trap (supplied in two sections with universal-fit seal and stopper included)
Lite In-line Outfall 150 Side Trap (supplied in two sections with locking bar, universal-fit seal and stopper included)
For 100mm dia pipe
For 100mm dia pipe
Lite In-line Outfall100 In-line Trap (supplied in two sections with locking bar, universal-fit seal and stopper included)
150 In-line Outfall 150 Side Trap (supplied in two sections with universal-fit seal and stopper included)
200 In-line Outfall, 150 Side Trap. (supplied in two sections with universal-fit seal and stopper included)
For 150mm dia pipe
100 In-line Outfall 100 In-line Trap (supplied in two sections with universal-fit seal and stopper included)
150 In-line Outfall 150 In-line Trap (supplied in two sections with universal-fit seal and stopper included)
BIRCO
BIRCO SYSTEM
Galvanised Junction/Outfall Grating 20 x 30mm mesh
For 150mm or 225mm dia pipe
Cast Iron Junction/Outfall Grating 100 x 6mm slots
Junction/Outfall Unit (supplied in three sections, with frame & frame bolts, universal-fit seal and stopper included)
105
COMPONENTS
COMPONENTS GRID TYPES AND LOADING CLASSIFICATION A15
B125
C250
D400
E600
F900 INLET APERTURE SIZE (mm)
AREA (mm2/m)
BIRCO LITE Cast Iron Heelsure
500 x 150
100 x 6
25,000
Cast Iron Slotted
500 x 150
100 x 12
41,200
Cast Iron Ellipse
500 x 150
N/A
41,400
Aluminium Slotted 500 x 150
100 x 12
41,200
Galvanised Cast Iron
500 x 150
100 x 12
41,200
Perforated Galvanised Steel
1000 x 150 500 x 150
8mmø 8mmø
5,600 5,600
Stainless Steel Slotted
1000 x 150 500 x 150
80 x 12 80 x 12
34,600 34,600
Stainless Steel Slotted
1000 x 150 500 x 150
80 x 6 80 x 6
22,100 22,100
Galvanised Steel Mesh
1000 x 150 500 x 150
30 x 30 30 x 30
108,000 108,000
Galvanised Steel Mesh
1000 x 150 500 x 150
30 x 12 30 x 12
103,500 103,500
Stainless Steel Mesh
1000 x 150 500 x 150
30 x 30 30 x 30
108,000 108,000
100 x 6
25,000
100 x 12
40,800
Note: All cast iron (Grey and Ductile) gratings are black coated when delivered. This is a temporary coating for aesthetic reasons only. Once installed, the gratings may show signs of surface oxidation. This is not detrimental and will not adversely affect the grating’s performance. If regularly trafficked, the surface will become polished to a dark colour. All gratings should be tightened upon installation to the following torque: Birco Lite – 25 Nm
BIRCO 100 500 x 186
Cast Iron Heelsure 500 x 186
BIRCO
Cast Iron Slotted Cast Iron Slotted
500 x 186
100 x 12
40,800
Cast Iron Slotted
500 x 186
100 x 12
40,800
Cast Iron Wave
500 x 186
85 x 13
36,400
Cast Iron Diagonal Slotted
500 x 186
130 x 13
41,200
Aluminium Slotted
500 x 186
100 x 13
45,600
Galvanised Cast Iron
500 x 186
100 x12
40,800
Cast Iron Solid Cover
500 x 186
N/A
N/A
Galv. Cast Iron Solid Cover
500 x 186
N/A
N/A
1000 x 186 500 x 186
30 x 30 30 x 30
108,000 108,000
1000 x 186 500 x 186
30 x 12 30 x 12
115,900 115,900
Galvanised Steel Mesh
1000 x 186 500 x 186
20 x 30 20 x 30
108,200 108,200
Galvanised Steel Mesh
1000 x 186 500 x 186
20 x 12 20 x 12
115,900 115,900
Galvanised Steel Mesh Galvanised Steel Mesh
106
All gratings should be tightened upon installation to the following torque: Birco 100 – 75 Nm, Birco 150 – 75 Nm, Birco 200 – 75 Nm, Birco 300 – 100 Nm.
Available ex-stock as standard Available subject to a special order
COMPONENTS
GRID TYPES AND LOADING CLASSIFICATION A15
B125
C250
D400
E600
F900 INLET APERTURE SIZE (mm)
AREA (mm2/m)
150 x12
64,800
BIRCO 150 Cast Iron Slotted
500 x 236
Cast Iron Slotted
500 x 236
150 x12
64,800
Cast Iron Slotted
500 x 236
150 x12
64,800
Cast Iron Wave
500 x 236
134 x12
54,200
Cast Iron Ellipse
500 x 236
N/A
62,000
Galvanised Cast Iron
500 x 236
150 x 12
64,800
Galv. Cast Iron Solid Cover
500 x 236
N/A
N/A
Cast Iron Solid Cover
500 x 236
N/A
N/A
Galvanised Steel Mesh
1000 x 236 500 x 236
20 x 30 20 x 30
108,000 108,000
Galvanised Steel Mesh
1000 x 236 500 x 236
20 x 12 20 x 12
88,800 88,800
Cast Iron Slotted
500 x 315
200 x 18
77,000
Cast Iron Slotted
500 x 315
200 x 18
77,000
Cast Iron Wave
500 x 315
189 x 18
75,600
Aluminium Slotted
500 x 315
200 x 18
77,000
Galvanised Cast Iron
500 x 315
200 x 18
77,000
Galv. Cast Iron Solid Cover
500 x 315
N/A
N/A
Cast Iron Solid Cover
500 x 315
N/A
N/A
Available ex-stock as standard
Galvanised Steel Mesh
1000 x 315 500 x 315
20 x 30 20 x 30
207,500 207,500
Available subject to a special order
BIRCO
BIRCO 200
107
COMPONENTS
COMPONENTS GRID TYPES AND LOADING CLASSIFICATION A15
B125
C250
D400
E600
F900 INLET APERTURE SIZE (mm)
AREA (mm2/m)
BIRCO 300 Cast Iron Slotted
500 x 430
142 x 20
143,200
Cast Iron Slotted
500 x 430
142 x 20
143,200
Cast Iron Slotted
500 x 430
142 x 20
143,200
Cast Iron Mesh
500 x 430
20 x 30
196,000
Galvanised Cast Iron Mesh
500 x 430
20 x 30
196,000
Galv. Cast Iron Slotted
500 x 430
142 x 20
143,200
Available ex-stock as standard
BIRCO
Cast Iron Solid Cover
108
500 x 430
N/A
N/A
Available subject to a special order
The Birco hydraulic data stated in the following tables comprises of flow capacity, in litres per second (l/s) and velocity in metres per second (m/s). This data has been calculated using the Colebrook-White formulae. BIRCO LITE & 100 Channel Type
0/0
5/0
10/0
15/0
20/0*
Gradient “1 in”
l/s
m/s
l/s
m/s
l/s
m/s
l/s
m/s
l/s
m/s
10
27
3.06
46
3.29
64
3.39
84
3.50
103
3.55
20
19
2.16
32
2.32
45
2.40
59
2.47
73
2.51
30
16
1.76
26
1.89
37
1.95
48
2.01
59
2.04
40
14
1.52
23
1.64
32
1.69
42
1.74
51
1.77
50
12
1.36
20
1.46
29
1.51
37
1.56
46
1.58
75
10
1.11
17
1.19
23
1.23
30
1.27
37
1.29
100
9
0.96
14
1.03
20
1.06
26
1.10
32
1.11
150
7
0.78
12
0.84
16
0.87
21
0.89
26
0.91
200
6
0.67
10
0.72
14
0.75
18
0.77
23
0.78
300
5
0.55
8
0.59
12
0.61
15
0.63
18
0.64
400
4
0.47
7
0.51
10
0.53
13
0.54
16
0.55
500
4
0.42
6
0.45
9
0.47
12
0.48
14
0.49
750
3
0.34
5
0.37
7
0.38
9
0.39
12
0.40
1000
3
0.29
4
0.32
6
0.33
8
0.34
10
0.34
1500
2
0.24
4
0.26
5
0.27
7
0.27
8
0.28
2000
2
0.21
3
0.22
4
0.23
6
0.24
7
0.24
Equivalent pipe diameter
120mm
145mm
160mm
175mm
190mm
5/0
10/0
15/0
20/0
HYDRAULIC DATA
HYDRAULIC DATA
* Not available in Birco Lite
Channel Type
0/0
Gradient “1 in”
l/s
m/s
l/s
m/s
l/s
m/s
l/s
m/s
l/s
m/s
10
87
4.34
123
4.47
160
4.56
198
4.65
235
4.70
20
61
3.06
87
3.16
113
3.22
140
3.29
166
3.32
30
50
2.50
71
2.58
92
2.63
114
2.68
135
2.71
40
43
2.16
61
2.23
80
2.27
99
2.32
117
2.34
50
39
1.93
55
1.99
71
2.03
88
2.07
105
2.09
75
31
1.57
45
1.62
58
1.66
72
1.69
85
1.71
100
27
1.36
39
1.40
50
1.43
62
1.46
74
1.48
150
22
1.11
31
1.14
41
1.17
51
1.19
60
1.20
200
19
0.96
27
0.99
35
1.01
44
1.03
52
1.04
300
16
0.78
22
0.81
29
0.82
36
0.84
42
0.85
400
13
0.67
19
0.70
25
0.71
31
0.72
37
0.73
500
12
0.60
17
0.62
22
0.63
27
0.65
33
0.65
750
10
0.49
14
0.50
18
0.51
22
0.53
27
0.53
1000
8
0.42
12
0.44
16
0.44
19
0.45
23
0.46
1500
7
0.34
10
0.35
13
0.36
16
0.37
19
0.37
2000
6
0.29
8
0.30
11
0.31
13
0.32
16
0.32
Equivalent pipe diameter
175mm
200mm
225mm
245mm
BIRCO
BIRCO 150
260mm 109
HYDRAULIC DATA
HYDRAULIC DATA BIRCO 200 Channel Type
0/0
Gradient
5/0
10/0
15/0
l/s
m/s
l/s
m/s
l/s
m/s
l/s
m/s
10
176
4.78
204
4.90
233
4.99
262
5.07
20
124
3.38
144
3.46
165
3.52
185
3.58
30
101
2.76
118
2.82
134
2.87
151
2.92
40
88
2.38
102
2.44
116
2.49
131
2.53
50
78
2.13
91
2.18
104
2.22
117
2.26
75
64
1.74
74
1.78
85
1.81
95
1.84
100
55
1.50
64
1.54
73
1.57
82
1.59
150
45
1.22
52
1.25
60
1.28
67
1.30
200
39
1.06
45
1.08
52
1.10
58
1.12
300
32
0.86
37
0.88
42
0.90
47
0.91
400
27
0.74
32
0.76
36
0.78
41
0.79
500
24
0.66
28
0.68
32
0.69
36
0.70
750
20
0.54
23
0.55
26
0.56
30
0.57
1000
17
0.47
20
0.48
23
0.49
26
0.49
1500
14
0.38
16
0.39
18
0.40
21
0.40
2000
12
0.33
14
0.33
16
0.34
18
0.35
“1 in”
Equivalent pipe
230mm
diameter
245mm
260mm
270mm
BIRCO 300
BIRCO
Channel Type
110
0/0
Gradient “1 in”
l/s
m/s
10
601
6.3
20
425
4.5
30
347
3.6
40
300
3.2
50
268
2.8
75
219
2.3
100
189
2.0
150
154
1.6
200
133
1.4
300
109
1.1
400
94
1.0
500
84
0.9
750
68
0.7
1000
59
0.6
1500
48
0.5
2000
41
0.4
Outfall Type
Outlet Pipe Diameter (mm)
m/s
l/s
Birco Lite Inline End Outlet Outfall
100
2.23
11
Birco Lite Inline Side Outlet Outfall
150
2.39
26
Birco 100 Inline End Outlet Outfall
100
2.27
11
Birco 100 Inline Side Outlet Outfall
150
2.42
26
Birco 150 inline End Outlet Outfall
150
2.42
26
Birco 150 inline Side Outlet Outfall
150
2.42
26
Birco 200 Inline Side Outlet Outfall
150
2.42
26
Junction Outfall 150mm
150
3.55
39
Junction Outfall 225mm
225
3.64
88.5
HYDRAULIC DATA
OUTFALL CAPACITIES
CONTACT DETAILS:Telephone: 0845 30 20 400 Facsimile: 0845 30 20 401
BIRCO
e-mail:
[email protected]
111
35" "!3%
2/!$"!3%
7%!2).'#/523% "!3%#/523%
-).##/.#2%4% "%$$).'!.$(!5.#( ! --,/!$#,!33!" ! --,/!$#,!33#
35" "!3%
!
35" "!3%
). 3)45 #/.#2%4%3,!"
! -).##/.#2%4% "%$$).'!.$(!5.#( ! --,/!$#,!33!" ! --,/!$#,!33#
STANDARD DETAILS
-).##/.#2%4% "%$$).'!.$(!5.#( /24/35)43,!" 30%#)&)#!4)/.
"IRCO,ITE#HANNEL3HOWN
")45-)./53#/.3425#4)/. ,/!$).'#,!33504/#
")2#/,)4% 490)#!,#(!..%,).34!,,!4)/.$%4!),3
"IRCO#HANNEL3HOWN
-AX
"IRCO#HANNEL3HOWN
). 3)45#/.#2%4%0!6%-%.4 ,/!$).'#,!33504/&
%80!.3)/.*/).47)4( 3%!,!.4 4/%.').%%23 30%#)&)#!4)/.
-).##/.#2%4% "%$$).'!.$(!5.#(
"IRCO#HANNEL3HOWN
+%2"
+%2"3)$%!00,)#!4)/. ,/!$).'#,!33#
-).##/.#2%4% "%$$).'!.$(!5.#( ! --,/!$#,!33$% ! --,/!$#,!33&
35" "!3%
2/!$"!3%
7%!2).'#/523% "!3%#/523%
35" "!3%
7%!2).'#/523% 2/!$"!3%
-).##/.#2%4% "%$$).'!.$(!5.#( ! --,/!$#,!33$% ! --,/!$#,!33&
")45-)./53#/.3425#4)/. ,/!$).'#,!33504/&
!
!,4%2.!4)6%$%4!), 7%!2).'#/523% %84%.$3/6%2 #/.#2%4%(!5.#( - &,%8
35" "!3%
",/#+0!6).' 3!.$"%$ 2/!$"!3%
"IRCO#HANNEL3HOWN
"IRCO,ITE#HANNEL3HOWN
",/#+0!6).' ,/!$).'#,!33504/&
!
-AX
",/#+0!6).'0!6).'&,!'3 ,/!$).'504/#
!
35" "!3%
0!6).'&,!'3 -/24!2"%$
-AX
",/#+0!6).' 3!.$"%$
!
(!5.#().'%84%.$3 4/352&!#%
!
!
112 DRAWING 1 OF 3
BIRCO STANDARD DETAILS
!
!
!
5NITISMMLONG
5NITISMMLONG
2%&%24/")2#/#(!..%, 3%#4)/.3&/2#/.#2%4% '2!$%!.$$)-%.3)/.g!g !
2%&%24/")2#/ #(!..%,3%#4)/.3&/2 $%4!),).'/&352&!#% !$*!#%.44/5.)4
!
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5NITISMMWIDE
")2#/ ).,).%%.$/54&!,,
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5NITISMMLONG
STANDARD DETAILS
")2#/*5.#4)/./54&!,,
2%&%24/")2#/#(!..%, 3%#4)/.3&/2#/.#2%4% '2!$%!.$$)-%.3)/.g!g
- &,%83%!,!.4
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BIRCO
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DRAWING 2 OF 3
113
*5.#4)/./54&!,,53%$!4%.$/& /.%25.490)#!,,953%$7(%2% 6/,5-%/&$)3#(!2'%2%15)2%3! ,!2'% 0)0%#/..%#4)/.
114 4*5.#4)/.#(!..%,53%$4/ #2%!4%!,%&4(!.$"%.$
53%/&")2#/g4g*5.#4)/.#(!..%,3
4*5.#4)/.#(!..%,53%$4/ #2%!4%!2)'(4(!.$"%.$
*5.#4)/./54&!,,53%$7(%2%4(2%% 25.3-%%4!4!g4g*5.#4)/. ."%!#(25.-!9"%!$)&&%2%.4 ")2#/3934%-
53%/&")2#/*5.#4)/./54&!,,5.)4
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*5.#4)/./54&!,,53%$7)4().25.3 490)#!,,953%$7(%2%,!2'% 0)0%#/..%#4)/.)32%15)2%$ /247/ $)&&%2%.4")2#/3934%-3!2%53%$
4*5.#4)/.#(!..%,53%$4/#/..%#447/25.3 !4 ).4//.%).,).%3)$%/54&!,, 0/33)",%!,4%2.!4)6%4/*5.#4)/./54&!,,5.)4 &/23(/24%225.3/23-!,,%2$2!).%$!2%!3
BIRCO
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4*5.#4)/.#(!..%,53%$ 4/#2%!4%!4*5.#4)/.
STANDARD DETAILS
STANDARD DETAILS
DRAWING 3 OF 3
DRAWINGS 1 TO 3 1. All loading applications are as defined in BS EN 1433:2002 “Drainage Channels for Vehicular and pedestrian Areas - Classification, Design, Testing Requirements, Marking and Quality Control”.
STANDARD DETAILS
NOTES FOR BIRCO INSTALLATION DETAILS
2. Birco outfall sections shall be jointed using Marshalls’ MFlex sealant. 3. The concrete grade and dimensions for bed, haunch and surround are shown in the Birco section of the Design Guide. 4. Where the concrete surround is taken to the surface, the concrete surround should have the appropriate freeze thaw resistance. 5. For high loading applications with poor conditions, consideration may be given to the local thickening of the sub-base. 6. Marshalls’ vertical joint sealant, M-Flex, shall be applied to all vertical joints of the channels. 7. Birco gratings should be chosen to suit the appropriate loading application, taking into account both static and dynamic loading conditions. 8. Movement joints details that fully isolate the Birco system whilst maintaining restraint shall be provided adjacent to all concrete slabs even when the slab is covered by another material. The use of dowel bars in concrete slab joints is common and should be considered especially for higherloading applications. 9. All grating bolts should be tightened to the appropriate torque shown in the Birco section of the Design Guide. 10. The top surface of the grating shall be between 5mm below the final pavement level.
BIRCO
11. All dimensions are in millimetres.
115
CONSTRUCTION
CONSTRUCTION INTRODUCTION Installation of the Marshalls’ Birco Linear Drain System should
Where channels are laid on or adjacent to existing or
be carried out in accordance with the Specification and
proposed concrete slabs, transverse joints shall be formed
Standard Detail Sheets. The following method of installation is
within the Units and haunching adjacent to the slab joints.
recommended.
Longitudinal movement joints shall also be formed between the haunching and the slabs as described in the contract and
EXCAVATION
in accordance with Birco Drain Standard Detail Sheets.
Sufficient material should be excavated to accommodate the drainage channels, concrete bedding and haunching, any ‘soft
OUTFALLS
spots’ or poorly compacted formation should be made good.
Outfall Units shall be of the type specified in the contract and
The top of the Birco Channel shall be 5mm below the final
constructed as shown in the Birco Standard Detail Sheets.
pavement surface.
Unless otherwise described in the contract, they shall be
Channels and outfall units shall be bedded directly onto a freshly mixed concrete foundation as shown in the Birco Standard Detail Sheets, or alternatively bedded on a layer of Mortar Class 12 to BS EN 998-2:2003 not less than 10mm and not more than 40mm thick on a previously prepared concrete foundation. CHANNELS Unless otherwise agreed, Channel Units shall be laid commencing at the outfall to previously established line and level. Setting out pins should be accurately located, with a string line level with the top of the drainage channels. Pins can be located to the rear of the channels to avoid having to lift components over the string line. Channel ends should abut as tightly as possible. The invert and surface levels of adjacent channels shall correspond. Any Units deviating more than 3mm in 3m from line and level shall be made good by lifting
bedded on and surrounded by 150mm of concrete of the appropriate grade. A suitable section of the wall of the outfall unit shall be cut out to allow adjacent drainage channels to abut without restricting the flow of water. Cutting shall be achieved by using a concrete saw or disc cutter. The horizontal joints between the sections of the outfall units shall be sealed with M-Flex sealant. The appropriate pipe adaptor shall be placed in the aperture for connection to the underground pipework. JOINT SEALANT Jointing of adjacent channels shall be carried prior to fixing the gratings. Marshalls’ M-Flex sealant should be gunned into the sealant groove formed when adjacent channels abut. Surplus sealant shall be removed from the inner surface of the units as work proceeds. One tube of M-Flex is suffient to seal the following:-
and relaying. A complete line of Units shall be approved by the specifier
M-FLEX REQUIREMENT Base Type
BIRCO LITE/100
before the completion of concrete haunching. Where cutting
BIRCO
Channels per tube
the Birco Channel Units is required, they shall be cut with a
0/0
22
concrete saw or disc cutter, so that no single Unit is less than
5/0
16
350mm long. Birco gratings shall not be cut unless directed
10/0
13
by the engineer. Any cut galvanised steel shall be renovated
15/0
11
using Defcon Z, or similar approved.
20/0
9 BIRCO 150
In situ concrete haunching shall not be placed until the installed units have been inspected and approved by the specifier. The concrete haunching shall be of a concrete grade appropriate to the Drainage Channel Loading Class as specified in the contract or the Birco Standard Detail Sheets. Haunching shall be carried out as one operation to a
0/0
15
5/0
13
10/0
11
15/0
10
20/0
8 BIRCO 200
complete line of Channel Units, to the dimensions indicated in the Birco Standard Detail sheets. Haunching / surround
0/0
11
concrete to the Outfall Unit shall be of the same grade as the
5/0
10
adjacent Channel Unit haunching in accordance with the
10/0
9
Birco Standard detail sheets. 116
15/0
8
IBF 16-20
8
GRATINGS
INTRODUCTION
Adjacent Carriageway and/or footway construction shall not
The following specification covers the complete Birco Linear
be commenced within 3 days of any jointing or haunching/
Drainage System including ancillary fittings and is compatible
surrounding concrete being placed.
with the Standard Detail Sheets.
securely bolted to Birco Channel Units having internal depths greater than 150mm, before adjacent pavement construction is commenced. On completion of the works, the drainage channel units shall be cleaned out and left free from obstruction. This shall be carried out either by removal of gratings or by high pressure
MARSHALLS BIRCO LINEAR DRAINAGE 1. The linear drainage system shall be Birco Lite/100/150/200/300, * manufactured in pre-cast concrete, with the exception of certain fitments manufactured in steel or cast iron, as supplied by Marshalls, Halifax HX5 9HT in accordance with Standard Detail Sheets. 2. The linear drainage shall be a two part system consisting
water jetting (100-150 bar at 200 litres/min minimum). Unless
of galvanised steel/cast iron gratings/covers bolted
otherwise agreed with the specifier, the slot openings shall
to precast concrete drainage channels reference (0/0)
be covered by timber boards or other method during jetting
/(5/0)/(10/0)/(15/0)/(20/0)* deep together with drainage
operations. Outfall units shall be emptied. The cleaning
channels that have Lite 0.5%/100-150-200 1.0%)* inbuilt
process should be repeated where necessary on completion
fall. The overall width of the system shall be not less than
of any remedial works.
160/200/250/330/450*mm.
All gratings shall be evenly spaced with bolts tightened down
3. All components of the Marshalls’ Birco System shall
securely to the appropriate torque (Lite: 25Nm, 100, 150 and
comply with Load Classification C250/D400/E600/F900* in
200: 75 Nm, 300:100Nm).
accordance with BS EN 1433:2002 and the following: (i) The Gratings shall be bolted to the drainage channel with a minimum of 4 No. M12/M16mm Ø stainless steel bolts per metre/one centrally located 12mm Ø stainless steel bolt fixed to a locking bar* (ii) The drainage channel will have cast-in 2mm (Lite)/4mm (100/150/200/300)* thick galvanised steel edge angles (iii) The system shall have a minimum of refer to table* mm²/m water inlet aperture area (iv) The drainage channels shall have an invert width of 100/150/200/300*mm* 4. The linear drainage system comprising gratings, covers, constant depth and inbuilt fall channels, outfalls, T junctions channels, end caps, cap outlets, and sealants shall be installed to the line and levels indicated in the contract documents and in accordance with the manufacturer’s instructions and Standard Details. Note: * delete as required
BIRCO
Unless agreed with the specifier, Birco gratings shall be
STANDARD DETAILS
SPECIFICATION
117
ITEM CODES
ITEM CODES BIRCO LITE Item
Weight Item Code (kg) Constant Depth (0/0) 38 DR0050100 Channels (5/0) 46 DR0050200 (10/0) 54 DR0050300 (15/0) 62 DR0050400 Inbuilt Fall Nos. 1 - 5 39 – 45 DR0200100 – 0200500 Channels Nos. 6 - 10 47 – 53 DR0200600 – 0201000 Nos. 11 - 15 55 – 61 DR0201100 – 0201500 Half Channels (0/0) 19 DR0101600 (5/0) 23 DR0101700 (10/0) 27 DR0101800 T Junction Channels (0/0) 19 DR0102100 (5/0) 23 DR0102200 (10/0) 27 DR0102300 Cast Iron Gratings 100 x 12mm slots 3.8 DR0353500 ‘Heelsure’ Lite 100 x 6mm slots 3.7 DR0353600 Galvanised Gratings 30 x 30mm mesh 6.0 DR0404550 30 x 30mm mesh Half Grating 3.0 DR0404600 30 x 15mm mesh 7 DR0404650 30 x 15mm mesh Half Grating 3.5 DR0404700 End Caps (0/0) 1 DR0451000 (5/0) 1.2 DR0451100 (10/0) 1.4 DR0451200 (15/0) 1.6 DR0451300 Cap Outlets (0/0) 1 DR0451500 (5/0) 1.2 DR0451600 (10/0) 1.4 DR0451700 (15/0) 1.6 DR0451800
BIRCO 100 Item
BIRCO
Channels, Standard Gratings*, End Caps and Cap Outlets Description
Channels, Standard Gratings*, End Caps and Cap Outlets Description
Weight (kg) Constant Depth (0/0) 54 Channels (5/0) 66 (10/0) 78 (15/0) 90 (20/0) 102 Inbuilt Fall Nos. 1-5 55-65 Channels Nos. 6-10 67-77 Nos. 11-15 79-89 Nos. 16-20 91-101 Half Channels (0/0) 27 (5/0) 33 (10/0) 39 T Junction Channels (0/0) 27 (5/0) 33 (10/0) 39 Cast Iron Gratings* 100 x 12mm slots 7 100 x 12mm slots 10 100 x 12mm slots 10 ‘Heelsure’ 100 x 6mm slots 7 Galvanised Gratings* 30 x 30mm mesh 7 30 x 30mm mesh Half Grating 3.5 30 x 15mm mesh 7.2 30 x 15mm mesh Half Grating 3.6 20 x 30mm mesh 9 20 x 30mm mesh Half Grating 4.5 End Caps (0/0) 1 (5/0) 1.2 (10/0) 1.4 (15/0) 1.6 (20/0) 1.8 Cap Outlets (0/0) 1 (5/0) 1.2 (10/0) 1.4 (15/0) 1.6 (20/0) 1.8
Item Code DR0801050 DR0801150 DR0801250 DR0801350 DR0801450 DR1000100 – 1000500 DR1000600 – 1001000 DR1001100 – 1001500 DR1001600 – 1002000 DR0901500 DR0901600 DR0901700 DR1101210 DR1101250 DR1101300 DR1151200 DR1151250 DR1151300 DR1151350 DR1152550 DR1152600 DR1152700 DR1152750 DR1152800 DR1152850 DR1251500 DR1251550 DR1251600 DR1251650 DR1251700 DR1251750 DR1251800 DR1251850 DR1251900 DR1251950
BIRCO 150
Channels, Standard Gratings*, End Caps and Cap Outlets
Item
Weight (kg) Constant Depth (0/0) 76 Channels (5/0) 88 (10/0) 100 (15/0) 112 (20/0) 124 Inbuilt Fall Nos. 1-5 77-87 Channels Nos. 6-10 89-99 Nos. 11-15 101-111 Nos. 16-20 113-123 Half Channels (0/0) 38 (5/0) 44 (10/0) 50 T Junction Channels (0/0) 38 (5/0) 44 (10/0) 50 Cast Iron Gratings* 150 x 12mm slots 9.5 150 x 12mm slots 10 Galvanised Gratings* 20 x 30mm mesh 14 20 x 30mm mesh Half Grating 7 End Caps (0/0) 1 (5/0) 1.2 (10/0) 1.4 (15/0) 1.6 Cap Outlets (0/0) 1 (5/0) 1.2 (10/0) 1.4 (15/0) 1.6
BIRCO 200
Description
DR1602000 DR1602050 DR1602100 DR1602150 DR1602200 DR1800100 – 1800500 DR1800600 – 1801000 DR1801100 – 1801500 DR1801600 – 1802000 DR1702060 DR1702260 DR1702360 DR1900200 DR1900300 DR1900400 DR1952000 DR1952100 DR1972800 DR1972900 DR1972000 DR1972100 DR1972200 DR1972300 DR2002500 DR2002600 DR2002700 DR2002800
Channels, Standard Gratings*, End Cap and Cap Outlet
Item
Description
Weight kg (approx) Constant Depth (0/0) 135 Channels (5/0)* 140 255mm deep (10/0) 147 280mm deep (15/0)* 153 Inbuilt Fall Nos. 1-5 135-140 Channels* Nos. 6-10 140-147 Nos. 11-15 147-153 Nos. 16-20 153-160 Half Channel (0/0) 71 T Junction Channel (0/0) 69 Cast Iron Gratings* 200 x 18mm slots 14.5 200 x 18mm slots 15.5 Galvanised Gratings* 20 x 30mm mesh 22 20 x 30mm mesh Half Grating 11 End Cap (0/0) 2 Cap Outlet (0/0) 2.5
Item Code DR2403000 DR2403100 DR2403200 DR2403300 DR2600100 – 2600500 DR2600600 – 2601000 DR2601100 – 2601500 DR2601600 – 2602000 DR2503100 DR2503200 DR2754000 DR2754100 DR2754300 DR2754400 DR2803500 DR2803700
*to special order
BIRCO 300 Item
Channels, Standard Gratings*, End Cap and Cap Outlet Description
Channel Cast Iron Gratings * 125 x 20mm slots 125 x 20mm slots 125 x 20mm slots End Cap Cap Outlet *Special Gratings also available
118
Item Code
Weight kg (approx) 228 20 22 23 2.5 3
Item Code DR3805000 DR3906100 DR3906200 DR3906300 DR3955300 DR3955400
Channels and End Caps
System
Description
100 Shallow
20mm 40mm 80mm 130mm 50mm 80mm 130mm 55mm 105mm 155mm 80mm 180mm
150 Shallow
200 Shallow
300 Shallow
ITEM CODES
BIRCO SHALLOW
Channel Ref. No. DR4204500 DR4204600 DR4204800 DR4204900 DR4304600 DR4304700 DR4304800 DR4404700 DR4404800 DR4404900 DR4504700 DR4504900
End Cap Item Code DR4251500 DR4251500 DR4251600 DR4251600 DR4352500 DR4352500 DR4352600 DR4453500 DR4453500 DR4453600 DR4555300 DR4555400
OUTFALLS BIRCO LITE
In-Line Outfalls and Standard Gratings
Item
Description
Outfalls
100 In-line Trap (for 100mm dia pipe) 150 Side Trap (for 150mm dia pipe) Cast Iron 100 x 12mm slots Cast Iron ‘Heelsure’ 100 x 6mm slots Cast Iron 100 x 12mm slots Galvanised 30 x 30mm mesh Half Grating Galvanised 30 x 15mm mesh Half Grating
Gratings
BIRCO 100 Item Outfalls Gratings
BIRCO SYSTEM
Weight (kg) 101 137 3.8 3.7 5.0 3.0 3.5
Item Code
Item
DR0501000 DR0501100 DR0353500 DR0353600 DR0353700 DR0404600 DR0404700
Outfalls
In-Line Outfalls and Standard Gratings* Description
Weight (kg) 100 In-line Trap (for 100mm dia pipe) 105 150 Side Trap (for 150mm dia pipe) 142 Cast Iron 100 x 12mm slots 7 Cast Iron 100 x 12mm slots 10 Cast Iron 100 x 12mm slots 10 Cast Iron ‘Heelsure” 100 x 6mm slots 7 Galvanised 30 x 30mm mesh Half Grating 3.5 Galvanised 30 x 12mm mesh Half Grating 3.6 Galvanised 20 x 30mm mesh Half Grating 4.5
Gratings
BIRCO 300
Junction Outfalls and Gratings
Description
Weight (kg) Junction/Outfall 150 (for 150mm dia pipe) 340 Junction/Outfall 225 (for 225mm dia pipe) 305 Cast Iron 100 x 6mm slots 26.5 Galvanised 30 x 30mm mesh 7 Galvanised 30 x 15mm mesh 7.5 Galvanised 20 x 30mm mesh 10
Item Code. DR4604000 DR4604050 DR4655200 DR4652500 DR4652600 DR4652700
Standard Gratings* and Outfall
Item Code
Item
Description
DR1301700 DR1301750 DR1151200 DR1151250 DR1151300 DR1151350 DR1152600 DR1152750 DR1152850
Outfalls
Birco 300 Outfall for 300mm dia pipe 125 x 20mm slots 125 x 20mm slots 125 x 20mm slots
Cast Iron Gratings*
Weight (kg)
Item Code.
☎
☎
20 22 23
DR3906100 DR3906200 DR3906300
* Special Gratings also available
CONTACT DETAILS:Telephone: 0845 30 20 400
Item Outfalls Gratings
BIRCO 200 Item Outfall Gratings
Facsimile: 0845 30 20 401
In-Line Outfalls and Standard Gratings Description (kg) 150 In-line Trap (for 150mm dia pipe) 150 Side Trap (for 150mm dia pipe) Cast Iron 150 x 12mm slots Cast Iron 150 x 12mm slots Cast Iron 150 x 12mm slots Galvanised 20 x 30mm mesh Half Grating
Weight
Item Code
140 158 9.5 10 11 7
DR2102700 DR2102800 DR1952000 DR1952100 DR1952200 DR1972900
Weight
Item Code
186 25 25 11
DR2903800 DR2754000 DR2754100 DR2754400
e-mail:
[email protected]
BIRCO
BIRCO 150
In-Line Outfall and Standard Gratings Description (kg) 150 Side Trap (for 150mm dia pipe) Cast Iron 200 x 15mm slots Cast Iron 200 x 15mm slots Galvanised 20 x 30mm mesh Half Grating
119
PLEASE NOTE
PLEASE NOTE Marshalls is committed to innovative product development and manufacture. The evolution of product design is continuous and information is subject to change without notice. Customers should check with Marshalls to ensure that they have the latest details. All Marshalls products are manufactured to the appropriate British Standard where applicable. Where products (or intended usage) lie outside the scope of the British (or European) Standard or no appropriate Standard exists, Marshalls’ own standard will be employed. All products are supplied subject to Marshalls Standard Conditions of Sale, a copy of which is available on request. Liability in respect of any statement, conditions, warranties and representations made on behalf of the Company is limited in accordance with the terms set in the Standard
DRAINAGE DESIGN GUIDE
Conditions of Sale.
120
Landscape House, Premier Way, Lowfields Business Park, Elland, West Yorkshire HX5 9HT TELEPHONE: 0845 3020400 FAX: 0845 3020401 www.marshalls.co.uk/drainage A SUBSIDIARY OF MARSHALLS PLC © COPYRIGHT MARSHALLS 2004 EDITION 4 AUGUST 2004
