6b Nscp 2010 Wood
Short Description
standard and design requirements...
Description
10/20/2010 11:21
NSCP 2010 Revisions in Chapter 6 Wood
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Summary of Revisions 1. The
provisions are refined to incorporate local practices and corrections in the NSCP 2001. 2. List of available wood species has been updated. 3. Machine-Graded Lumber is included.
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Summary of Revisions 1.The
provisions are refined to incorporate local practices and corrections in the NSCP 2001.
2.
List of available wood species has been updated.
3.
Machine-Graded Lumber is included.
3
Revision 1 Example: Item 619.5 Miscellaneous Fasteners Figures 619.5.2-A to 619.5.2-C are included to show Withdrawal Connections Example: Mention of “UBC Standard 23-1” is removed. 4
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Revision 1 Example: Reasonable and more practical roundingoff of numbers (relaxed conversion of English unit equivalents, i.e. 278 mm2 to 270 mm2; 30 m instead of 30.5 m.) Example: Units are made consistent. For size dimensions, use of mm. For distances, lengths, use of m. 5
Summary of Revisions 1.
The provisions are refined to incorporate local practices and corrections in the NSCP 2001.
2.List
of available wood species has been updated.
3.
Machine-Graded Lumber is included.
6
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Revision 2 Table 6-1: List per NSCP 2001 + Table 6-35: Additional Unseasoned Structural Timber of Philippine Woods
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Summary of Revisions 1.
The provisions are refined to incorporate local practices and corrections in the NSCP 2001.
2.
List of available wood species has been updated.
3.Machine-Graded
Lumber is
included.
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Revision 3 NSCP 2001 : up to Section 621 only. NSCP 2010 : Additional Section 622 Use of Machine-Graded Lumber
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Detailed Comparison
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Section 601 - General
NSCP 2001
NSCP 2010
601.1
Scope
Same
601.2
Design Method
Same
601.2.1 601.2.2
Same
Allowable Stress Design Conventional Light-Frame Construction
Same except that “mention of NSCP Volume 3 on Housing “ is added.
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Section 601.2.1 Allowable Stress Design Design using ASD methods shall resist the different load combinations in accordance with the applicable requirements of Section 604. 203.4.1 Basic Load Combinations D+F; D + H + F + (Lr or R) ; D + H + F + (W or E/1.4)
D+H+F+L+T D + H + F + 0.75[L + T + (Lr or R)]
No increase in allowable stresses shall be used with these load comb except as specifically permitted by Section 203.4.2.
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Section 203.4.2 Alternate Basic Load Combinations When using these alternate basic load comb, a 1/3 increase shall be permitted in allowable stresses for all combinations , including W or E. D + H + F + 0.75[ L + Lr + (W or E/1.4)] ; 0.60D + W + H ;
0.60D + E/1.4 + H
D + L + (Lr or R) ;
D+L+W
D + L + E/1.4
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Section 601.2.2 Conventional Light-Frame Construction.
The design and construction. of conventional light-frame wood structures shall be in accordance with the applicable requirements of Section 604 and the NSCP Vol 3. 604.1.2 Wind and Earthquake load-resisting systems for all engineered wood structures shall be designed and constructed in accordance with the requirements of Section 614. Section 614 WOOD SHEAR WALLS AND DIAPHRAGMS Unless permitted by the Bldg Official or by relevant provisions of NSCP Vol. 3,, use of wood shear walls and diaphragms shall be limited to 1 to 2-storey dwellings. 14
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Section 602 - Definitions
NSCP 2001
NSCP 2010 New Terms defined FOREST PRODUCTS RESEARCH AND DEVELOPMENT INSTITUTE (FPRDI) MACHINE -GRADED LUMBER (MGL) MOISTURE CONTENT (MC) STRUCTURAL GLUED-LAMINATED TIMBER BRACED WALL LINE
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Section 603 – Minimum Quality
NSCP 2001 603.1
Quality and Identification
NSCP 2010 603.1 Quality and Identification “All preservatively treated wood required to be treated shall be identified by the quality mark of an approved inspection agency.” - DELETED
603.2
Minimum Capacity or Grade “Studs, joists, rafters... shall be of at least minimum grades... set forth in Table 6.1 or Table 6.2”
603.2
Minimum Capacity or Grade “Studs, joists, rafters... shall be of at least minimum grades... set forth in Table 6.1 or Table 6.2 or Table 6.35” 16
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Section 603 – Minimum Quality
NSCP 2001 603.2
Minimum Capacity or Grade - Continued
NSCP 2010 603.2
“Wood structural panels shall be of grades specified in .... UBC Standard 23-2 and UBC 23-3” 603.3
603.4
Timber Connectors and Fasteners Fabrication, Installation and Manufacture
Minimum Capacity or Grade - Continued “Wood structural panels shall be of grades specified in .... PNS”
603.3 603.4
Timber Connectors and Fasteners – Same Fabrication, Installation and Manufacture - Same 17
Section 603 – Minimum Quality
NSCP 2001
603.4 Fabrication, Installation and Manufacture 603.4.1
General
NSCP 2010 603.4 Fabrication, Installation and Manufacture Additional
603.4.2
Timber, Connectors and Fasteners
603.4.4 Structural Glued-Laminated Lumber
603.4.3
Metal Plate-Connected Wood Trusses
Fire Retardant603.4.5 Dried Treated Wood
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Section 603 – Minimum Quality
NSCP 2001 603.5
Dried Fire-Retardant-Treated Wood
603.6
Size of Structural Members
603.7
Shrinkage
603.8
Rejection
NSCP 2010 603.5 ~ 603.8 Same
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Section 604 – Design and Construction Requirements NSCP 2001 604.1
General
NSCP 2010 604.1
General Basically the same, except for Additional User Note Re: Use of NSCP 3 for single-family dwellings
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Section 604.1.4 The design and construction of conventional lightframe wood structures shall be in accordance with Section 620. Section 620 CONVENTIONAL LIGHT-FRAME CONSTRUCTION DESIGN PROVISIONS Only the ff: occupancies may be constructed in accordance with this division; 1. One, two or 3-storey residential buildings 2. One-storey Occupancy Category IV Bldgs (Table 103-1) 3. Category V Occupancies
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Section 605 –
Decay and Termite Protection
NSCP 2001 605.1
Preparation of Building Site
605.2
Wood Support Embedded in Ground
605.3
Under-floor Clearance
605.4 605.5
NSCP 2010 605.1 ~ 605.4 Same
Plates, Sills and Sleepers Columns and Posts 605.5 Columns and Posts “... pedestal shall project at least “... pedestal shall project at least 200 mm above exposed earth...” 150 mm above exposed earth...” “… concrete or masonry piers ... of approved wood of natural resistance to decay or treated wood is used.”
“… concrete or masonry piers ... of approved wood of natural resistance to decay.”
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Section 605 –
Decay and Termite Protection
NSCP 2001
NSCP 2010
605.6
Girders Entering Masonry or Concrete Walls
605.7
Under-Floor Ventilation
605.8
Wood and Earth Separation
605.9
Wood Supporting Roofs and Floors
605.6 ~ 605.10 Same
605.10 Moisture Content of Treated Wood
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Section 605 –
Decay and Termite Protection
NSCP 2001
NSCP 2010
605.11 Retaining Walls “All wood used as permanent parts of retaining or crib walls...”
605.11 Similar, re-worded “Wood used in retaining or crib walls...”
605.12 Weather Exposure
605.12 Weather Exposure Additional provision for glued-laminated timbers.
605.13
605.13 Water Splash – Similar, reworded
Water Splash
“Where wood-frame walls and partitions... shall be protected with approved waterproof paper conforming to Section on Weather Protection.”
“Where wood-frame walls and partitions... shall be protected with approved waterproofing.” 24
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Section 606 –
Wood Supporting Masonry or Concrete
NSCP 2001
NSCP 2010
606.1
Dead Load
606.1
Similar, re-worded
606.2
Horizontal Force
606.2
Same, except that Exceptions are not shown. Instead, referred to Section 614.2.
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Section 607 –
Wall Framing
NSCP 2001
NSCP 2010 Same
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Section 608 –
NSCP 2001
Floor Framing
NSCP 2010 -Essentially the same except for some relaxation in unit conversion from English to metric equivalents. Hence, instead of “93 mm2” --“90 mm2”; instead of “278 mm2” --- “270 mm2”; instead of “30.50 m”---”30 m”. -Instead of “Fire stopping shall consist of ...” --- “Fire blocks shall consist of ...”
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Section 609 –
NSCP 2001 609.1 General
Exterior Wall Coverings NSCP 2010 609.1 ~ 609.7
Same
609.2 Siding 609.3 Plywood 609.4 Shingles or Shakes 609.5 Particleboard 609.6 Hardboard 609.7 Nailing
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Section 610 –
Interior Paneling
NSCP 2001 Section 610
NSCP 2010 Same
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Section 611 –
NSCP 2001 611.1
Structural Floor Sheathing
611.2
Structural Roof Sheathing
Sheathing
NSCP 2010 611.1 ~ 611.2
Same
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Section 612 –
Mechanically Laminated Floors
NSCP 2001 Section 612
NSCP 2010
- Essentially the same,
except that all distances are now in meters (m), dimensions are in millimeters (mm).
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Section 613 –
Post-Beam Connection
NSCP 2001 Section 613
NSCP 2010 Same
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Section 614 –
Wood Shear Walls and Diaphragms
NSCP 2001
NSCP 2010
614.1 General
614.1
General Additional User Note: “Unless permitted by the Building Official or by relevant provisions of NSCP Volume III, use of wood shear walls and diaphragms shall be limited...”
614.2
Wood Resisting Horizontal Forces Contributed by Masonry and Concrete
614.2
Same
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Section 614 –
Wood Shear Walls and Diaphragms
NSCP 2001 614.3 Diagonally Sheathed Diaphragms
NSCP 2010 614.3
Wood Diaphragms Essentially the same except that “Wood structural panels used for horizontal and vertical diaphragms shall conform to … or PNS”
614.4
Particleboard Diaphragms
Same
614.5
Wood Shear Walls and Diaphragms in Seismic Zone 4
614.6
Fiberboard Sheathing Diaphragms
For 614.5 ~ 614.6 Essentially the same except that NSCP Volume 3 is mentioned in the scope and lengths are in meters (m).
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Section 615 –
Stresses
NSCP 2001 615.1 General
NSCP 2010 615.1
General Additional Note: Values therein indicated are reference design values. All the tabulated design values include reductions for safety and are primarily intended for direct application in ASD. Symbols are explained.
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Section 615 –
Stresses
NSCP 2001 615.2 Stresses in Piles Used as Structural Members 615.3
Adjustment of Stresses
NSCP 2010 Same Essentially the same except that the representative variables used in the provisions are listed and defined.
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Section 616 –
Horizontal Member Design
NSCP 2001 616.1 616.2 616.3
Beam Span Flexure Horizontal Shear
616.4
Horizontal Shear in Notched Beams
616.5
Design of Joints in Shear
616.6
Compression Perpendicular to Grain
616.7
Lateral Support
616.8
Lateral Support of Arches, Compression Chords of Trusses and Studs
NSCP 2010 616.1~616.8 Essentially the same ERRATUM: 616.6 Cb = ( Ib + 9.5 ) / Ib; lb = mm
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Section 617 –
Column Design
NSCP 2001
NSCP 2010
617.1
Column Classifications
Same
617.2
Limitation on l/d Ratio
617.3
Simple Solid-Column Design
Basically the same, except for bottom note. Now, le = Ke l.
617.4
Tapered Columns
Same
DELETED: “For individual members of spaced columns, see UBC Standard No. 25-15 ... or Division II of the Uniform Building Code, Volume 2, 1994.”
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Section 618 –
Flexural and Axial Loading Combined
NSCP 2001
NSCP 2010
618.1 Flexure and Axial Tension
Additional: Variables redefined.
618.2 Flexure and Axial Compression
Same
618.3 Spaced Columns
Same
618.4 Truss Compression Chords
Essentially the same, except that all distances are now in meters (m), size dimensions are now in millimeters (mm).
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Section 619 –
Timber Connectors and Fasteners
NSCP 2001
NSCP 2010
619.1 General
Basically the same except that referrals to UBC sections have been removed.
619.2
Bolts
Same
619.3
Nails and Spikes
Same
619.4
Joist Hangers and Framing Anchors
Same
619.5
Miscellaneous Fasteners
Basically the same except that referrals to UBC sections have been removed.
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Section 620 – Conventional LightFrame Construction Provisions NSCP 2001
NSCP 2010
620.1
General
Classification “Group U Occupancies in NSCP 2001” has been corrected to “Category V”
620.2
Design of Portions
Same
620.3
Additional Requirements for Conventional Construction in High-wind Areas
Essentially the same except that referral to UBC has been deleted.
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Section 620 – Conventional LightFrame Construction Provisions NSCP 2001 Requirements for 620.4 Additional Conventional Construction in Seismic Zone 2
NSCP 2010 Minor changes: Wind speed referred to now is “125 kph (formerly 129 kph in NSCP 2001)” and “10.0m (formerly 10.20 in NSCP 2001)” DELETED “Braced Wall Lines for High Wind” provisions
620.5 Additional Requirements for Conventional Construction in Seismic Zone 4
Essentially the same except that all lengths are in meters (m), and significant digits have been reduced, i.e. Instead of “83.61 m2”--”84 m2” is used.
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Section 620 – Conventional LightFrame Construction Provisions NSCP 2001
NSCP 2010
620.6
Girders
Essentially the same, except there is mention of NSCP Volume 3.
620.7
Floor Joists
Essentially the same, except there is mention of NSCP Volume 3; All lengths are in meters (m).
620.8
Subflooring
Same
620.9
Particleboard Underlayment
Same
620.10 Wall Framing
Essentially the same except that all lengths are in meters (m).
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Section 621 –
Metal Plate Connected Wood Truss Design
NSCP 2001
NSCP 2010
621.1
Design and Fabrication
Same
621.2
Performance
Same
621.3
In-plant Inspection
Same
621.4
Marking
Same
END OF CHAPTER 6 FOR NSCP 2001
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Section 622 –
Use of Machine Graded Lumber (MGL)
NSCP 2001
NSCP 2010 622.1 General 622.2 Design Properties for Machine Graded Lumber 622.3
Design Using Machine Graded Lumber
622.4
Preservative Treatment
622.5
Moisture Content
622.6
Markings END
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THANK YOU ! It was a pleasure having you all!
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