6b Nscp 2010 Wood

August 19, 2017 | Author: Ryan Taga | Category: Lumber, Framing (Construction), Wall, Architectural Elements, Building Materials
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standard and design requirements...

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10/20/2010 11:21

NSCP 2010 Revisions in Chapter 6 Wood

1

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.

2

10/20/2010 11:21

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

10/20/2010 11:21

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

10/20/2010 11:21

Revision 2 Table 6-1: List per NSCP 2001 + Table 6-35: Additional Unseasoned Structural Timber of Philippine Woods

7

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.

8

10/20/2010 11:21

Revision 3 NSCP 2001 : up to Section 621 only. NSCP 2010 : Additional Section 622 Use of Machine-Graded Lumber

9

Detailed Comparison

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10/20/2010 11:21

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.

11

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.

12

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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

13

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

10/20/2010 11:21

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

15

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

10/20/2010 11:21

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

18

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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

19

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

20

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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

21

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.”

22

10/20/2010 11:21

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

23

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

10/20/2010 11:21

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.

25

Section 607 –

Wall Framing

NSCP 2001

NSCP 2010 Same

26

10/20/2010 11:21

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 ...”

27

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

28

10/20/2010 11:21

Section 610 –

Interior Paneling

NSCP 2001 Section 610

NSCP 2010 Same

29

Section 611 –

NSCP 2001 611.1

Structural Floor Sheathing

611.2

Structural Roof Sheathing

Sheathing

NSCP 2010 611.1 ~ 611.2

Same

30

10/20/2010 11:21

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).

31

Section 613 –

Post-Beam Connection

NSCP 2001 Section 613

NSCP 2010 Same

32

10/20/2010 11:21

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

33

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).

34

10/20/2010 11:21

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.

35

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.

36

10/20/2010 11:21

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

37

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.”

38

10/20/2010 11:21

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).

39

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.

40

10/20/2010 11:21

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.

41

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.

42

10/20/2010 11:21

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).

43

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

44

10/20/2010 11:21

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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