Exception: Buildings designed in accordance with the provisions of the AF&PA WFCM shall be deemed to meet the requirements of the provisions of Section 2308.
Exceptions:
For the required test standards for joist hangers see Section 1711.1.
TABLE 2304.6
MINIMUM THICKNESS OF WALL SHEATHING
SHEATHING TYPE | MINIMUM THICKNESS | MAXIMUM WALL STUD SPACING |
Wood boards | 5/8 inch | 24 inches on center |
Fiberboard | 1/2 inch | 16 inches on center |
Wood structural panel | In accordance with Tables 2308.9.3(2) and 2308.9.3(3) | — |
M-S “Exterior Glue“ and M-2 “Exterior Glue“ Particleboard | In accordance with Section 2306.3 and Table 2308.9.3(4) | — |
Gypsum sheathing | 1/2 inch | 16 inches on center |
Gypsum wallboard | 1/2 inch | 24 inches on center |
Reinforced cement mortar | 1 inch | 24 inches on center |
TABLE 2304.6.1
MAXIMUM NOMINAL DESIGN WIND SPEED, Vasd PERMITTED FOR
WOOD STRUCTURAL PANEL WALL SHEATHING USED TO RESIST WIND PRESSURESa, b, c
MINIMUM NAIL | MINIMUM WOOD STRUCTURAL PANEL SPAN RATING | MINIMUM NOMINAL PANEL THICKNESS (inches) | MAXIMUM WALL STUD SPACING (inches) | PANEL NAIL SPACING | MAXIMUM NOMINAL DESIGN WIND SPEED, Vasdd (MPH) | ||||
Size | Penetration (inches) | Edges (inches o.c.) | Field (inches o.c.) | Wind exposure category | |||||
B | C | D | |||||||
6d common (2.0″× 0.113″) | 1.5 | 24/0 | 3/8 | 16 | 6 | 12 | 110 | 90 | 85 |
24/16 | 7/16 | 16 | 6 | 12 | 110 | 100 | 90 | ||
6 | 150 | 125 | 110 | ||||||
8d common (2.5″× 0.131″) | 1.75 | 24/16 | 7/16 | 16 | 6 | 12 | 130 | 110 | 105 |
6 | 150 | 125 | 110 | ||||||
24 | 6 | 12 | 110 | 90 | 85 | ||||
6 | 110 | 90 | 85 |
- Panel strength axis shall be parallel or perpendicular to supports. Three-ply plywood sheathing with studs spaced more than 16 inches on center shall be applied with panel strength axis perpendicular to supports.
- The table is based on wind pressures acting toward and away from building surfaces in accordance with Section 30.7 of ASCE 7. Lateral requirements shall be in accordance with Section 2305 or 2308.
- Wood structural panels with span ratings of wall-16 or wall-24 shall be permitted as an alternative to panels with a 24/0 span rating. Plywood siding rated 16 o.c. or 24 o.c. shall be permitted as an alternative to panels with a 24/16 span rating. Wall-16 and plywood siding 16 o.c. shall be used with studs spaced a maximum of 16 inches o.c.
- V asd shall be determined in accordance with Section 1609.3.1.
TABLE 2304.7(1)
ALLOWABLE SPANS FOR LUMBER FLOOR AND ROOF SHEATHINGa, b
SPAN (inches) | MINIMUM NET THICKNESS (inches) OF LUMBER PLACED | |||
Perpendicular to supports | Diagonally to supports | |||
Surfaced dryc | Surfaced unseasoned | Surfaced dryc | Surfaced unseasoned | |
Floors | ||||
24 | 3/4 | 25/32 | 3/4 | 25/32 |
16 | 5/8 | 11/16 | 5/8 | 11/16 |
Roofs | ||||
24 | 5/8 | 11/16 | 3/4 | 25/32 |
TABLE 2304.7(2)
SHEATHING LUMBER, MINIMUM GRADE REQUIREMENTS: BOARD GRADE
SOLID FLOOR OR ROOF SHEATHING | SPACED ROOF SHEATHING | GRADING RULES |
Utility | Standard | NLGA, WCLIB, WWPA |
4 common or utility | 3 common or standard | NLGA, WCLIB, WWPA, NSLB or NELMA |
No. 3 | No. 2 | SPIB |
Merchantable | Construction common | RIS |
TABLE 2304.7(3)
ALLOWABLE SPANS AND LOADS FOR WOOD STRUCTURAL PANEL SHEATHING AND
SINGLE-FLOOR GRADES CONTINUOUS OVER TWO OR MORE SPANS WITH STRENGTH AXIS PERPENDICULAR TO SUPPORTSa, b
SHEATHING GRADES | ROOFc | FLOORd | ||||
Panel span rating roof/ floor span | Panel thickness (inches) | Maximum span (inches) | Loade(psf) | Maximum span (inches) | ||
With edge supportf | Without edge support | Total load | Live load | |||
16/0 | 3/8 | 16 | 16 | 40 | 30 | 0 |
20/0 | 3/8 | 20 | 20 | 40 | 30 | 0 |
24/0 | 3/8,7/16,1/2 | 24 | 20g | 40 | 30 | 0 |
24/16 | 7/16,1/2 | 24 | 24 | 50 | 40 | 16 |
32/16 | 15/32,1/2,5/8 | 32 | 28 | 40 | 30 | 16h |
40/20 | 19/32,5/8,3/4,7/8 | 40 | 32 | 40 | 30 | 20h,i |
48/24 | 23/32,3/4,7/8 | 48 | 36 | 45 | 35 | 24 |
54/32 | 7/8, 1 | 54 | 40 | 45 | 35 | 32 |
60/32 | 7/8, 11/8 | 60 | 48 | 45 | 35 | 32 |
SINGLE FLOOR GRADES | ROOFc | FLOORd | ||||
Panel span rating | Panel thickness (inches) | Maximum span (inches) | Loade(psf) | Maximum span (inches) | ||
With edge supportf | Without edge support | Total load | Live load | |||
16 o.c. | 1/2,19/32,5/8 | 24 | 24 | 50 | 40 | 16h |
20 o.c. | 19/32,5/8,3/4 | 32 | 32 | 40 | 30 | 20h,i |
24 o.c. | 23/32,3/4 | 48 | 36 | 35 | 25 | 24 |
32 o.c. | 7/8, 1 | 48 | 40 | 50 | 40 | 32 |
48 o.c. | 13/32, 11/8 | 60 | 48 | 50 | 40 | 48 |
TABLE 2304.7(4)
ALLOWABLE SPAN FOR WOOD STRUCTURAL PANEL COMBINATION SUBFLOOR-UNDERLAYMENT (SINGLE FLOOR)a, b
(Panels Continuous Over Two or More Spans and Strength Axis Perpendicular to Supports)
IDENTIFICATION | MAXIMUM SPACING OF JOISTS (inches) | ||||
16 | 20 | 24 | 32 | 48 | |
Species groupc | Thickness (inches) | ||||
1 | 1/2 | 5/8 | 3/4 | — | — |
2, 3 | 5/8 | 3/4 | 7/8 | — | — |
4 | 3/4 | 7/8 | 1 | — | — |
Single floor span ratingd | 16 o.c. | 20 o.c. | 24 o.c. | 32 o.c. | 48 o.c. |
TABLE 2304.7(5)
ALLOWABLE LOAD (PSF) FOR WOOD STRUCTURAL PANEL ROOF SHEATHING CONTINUOUS
OVER TWO OR MORE SPANS AND STRENGTH AXIS PARALLEL TO SUPPORTS
(Plywood Structural Panels Are Five-Ply, Five-Layer Unless Otherwise Noted)a, b
PANEL GRADE | THICKNESS (inch) | MAXIMUM SPAN (inches) | LOAD AT MAXIMUM SPAN (psf) | |
Live | Total | |||
Structural I sheathing | 7/16 | 24 | 20 | 30 |
15/32 | 24 | 35c | 45c | |
1/2 | 24 | 40c | 50c | |
19/32,5/8 | 24 | 70 | 80 | |
23/32,3/4 | 24 | 90 | 100 | |
Sheathing, other grades covered in DOC PS 1 or DOC PS 2 | 7/16 | 16 | 40 | 50 |
15/32 | 24 | 20 | 25 | |
1/2 | 24 | 25 | 30 | |
19/32 | 24 | 40c | 50c | |
5/8 | 24 | 45c | 55c | |
23/32,3/4 | 24 | 60c | 65c |
Decking that cantilevers beyond a support for a horizontal distance greater than 18 inches (457 mm), 24 inches (610 mm) or 36 inches (914 mm) for 2-inch (51 mm), 3-inch (76 mm) and 4-inch (102 mm) nominal thickness decking, respectively, shall comply with the following:
Laminations shall be toenailed to supports with 20d or larger common nails. Where the supports are 48 inches (1219 mm) o.c. or less, alternate laminations shall be toenailed to alternate supports; where supports are spaced more than 48 inches (1219 mm) o.c., alternate laminations shall be toenailed to every support.
TABLE 2304.9.1
FASTENING SCHEDULE
CONNECTION | FASTENINGa, m | LOCATION | |
1.Joist to sill or girder | 3 - 8d common (21/2″ × 0.131″) 3 - 3″ × 0.131″nails 3 - 3″ 14 gage staples | toenail | |
2.Bridging to joist | 2 - 8d common (21/2″ × 0.131″) 2 - 3″ × 0.131″ nails 2 - 3″ 14 gage staples | toenail each end | |
3.1″ × 6″ subfloor or less to each joist | 2 - 8d common (21/2″ × 0.131″) | face nail | |
4.Wider than 1″× 6″ subfloor to each joist | 3 - 8d common (21/2″ × 0.131″) | face nail | |
5.2″subfloor to joist or girder | 2 - 16d common (31/2″ × 0.162″) | blind and face nail | |
6.Sole plate to joist or blocking | 16d (31/2″ × 0.135″) at 16″ o.c. 3″ × 0.131″ nails at 8″ o.c. 3″ 14 gage staples at 12″ o.c. | typical face nail | |
Sole plate to joist or blocking at braced wall panel | 3- 16d (31/2″ × 0.135″) at 16″ o.c. 4 - 3″ × 0.131″ nails at 16″ o.c. 4 - 3″ 14 gage staples at 16″ o.c. | braced wall panels | |
7.Top plate to stud | 2 - 16d common (31/2″ × 0.162″) 3 - 3″ × 0.131″ nails 3 - 3″14 gage staples | end nail | |
8.Stud to sole plate | 4 - 8d common (21/2″ × 0.131″) 4 - 3″ × 0.131″ nails 3 - 3″ 14 gage staples | toenail | |
2 - 16d common (31/2″ × 0.162″) 3 - 3″ × 0.131″ nails 3 - 3″ 14 gage staples | end nail | ||
9.Double studs | 16d (31/2″ × 0.135″)at 24″ o.c. 3″ × 0.131″ nail at 8″ o.c. 3″ 14 gage staple at 8″ o.c. | face nail | |
10.Double top plates | 16d (31/2″ × 0.135″) at 16″ o.c. 3″ × 0.131″ nail at 12″ o.c. 3″ 14 gage staple at 12″ o.c. | typical face nail | |
Double top plates | 8 - 16d common (31/2″ × 0.162″) 12 - 3″ × 0.131″nails 12 - 3″ 14 gage staples | lap splice | |
11.Blocking between joists or rafters to top plate | 3 - 8d common (21/2″ × 0.131″) 3 - 3″ × 0.131″ nails 3 - 3″ 14 gage staples | toenail | |
12.Rim joist to top plate | 8d (21/2″ × 0.131″) at 6″ o.c. 3″ × 0.131″nail at 6″ o.c. 3″ 14 gage staple at 6″ o.c. | toenail | |
13.Top plates, laps and intersections | 2 - 16d common (31/2″ × 0.162″) 3 - 3″ × 0.131″nails 3 - 3″ 14 gage staples | face nail | |
14.Continuous header, two pieces | 16d common (31/2″ × 0.162″) | 16″o.c. along edge | |
15.Ceiling joists to plate | 3 - 8d common (21/2″ × 0.131″) 5 - 3″ × 0.131″nails 5 - 3″ 14 gage staples | toenail | |
16.Continuous header to stud | 4 - 8d common (21/2″ × 0.131″) | toenail |
(continued)
TABLE 2304.9.1—continued
FASTENING SCHEDULE
CONNECTION | FASTENINGa, m | LOCATION | |
17.Ceiling joists, laps over partitions (see Section 2308.10.4.1, Table 2308.10.4.1) | 3 - 16d common (31/2″ × 0.162″) minimum, Table 2308.10.4.1 4 - 3″ × 0.131″ nails 4 - 3″ 14 gage staples | face nail | |
18.Ceiling joists to parallel rafters (see Section 2308.10.4.1, Table 2308.10.4.1) | 3 - 16d common (31/2″ × 0.162″) minimum, Table 2308.10.4.1 4 - 3″ × 0.131″ nails 4 - 3″ 14 gage staples | face nail | |
19.Rafter to plate (see Section 2308.10.1, Table 2308.10.1) | 3 - 8d common (21/2″ × 0.131″) 3 - 3″ × 0.131″ nails 3 - 3″ 14 gage staples | toenail | |
20.1″ diagonal brace to each stud and plate | 2 - 8d common (21/2″ × 0.131″) 2 - 3″ × 0.131″ nails 3 - 3″ 14 gage staples | face nail | |
21.1″ × 8″ sheathing to each bearing | 3 - 8d common (21/2″ × 0.131″) | face nail | |
22.Wider than 1″ × 8″ sheathing to each bearing | 3 - 8d common (21/2″ × 0.131″) | face nail | |
23.Built-up corner studs | 16d common (31/2″ × 0.162″) 3″ × 0.131″ nails 3″ 14 gage staples | 24″ o.c. 16″ o.c. 16″ o.c. | |
24.Built-up girder and beams | 20d common (4″ × 0.192″) 32″ o.c. 3″ × 0.131″ nail at 24″o.c. 3″ 14 gage staple at 24″o.c. | face nail at top and bottom staggered on opposite sides | |
2 - 20d common (4″ × 0.192″) 3 - 3″ × 0.131″ nails 3 - 3″ 14 gage staples | face nail at ends and at each splice | ||
25.2″ planks | 16d common (31/2″ × 0.162″) | at each bearing | |
26.Collar tie to rafter | 3 - 10d common (3″ × 0.148″) 4 - 3″ × 0.131″ nails 4 - 3″ 14 gage staples | face nail | |
27.Jack rafter to hip | 3 - 10d common (3″ × 0.148″) 4 - 3″ × 0.131″ nails 4 - 3″ 14 gage staples | toenail | |
2 - 16d common (31/2″ × 0.162″) 3 - 3″ × 0.131″ nails 3 - 3″ 14 gage staples | face nail | ||
28.Roof rafter to 2-by ridge beam | 2 - 16d common (31/2″ × 0.162″) 3 - 3″ × 0.131″ nails 3 - 3″ 14 gage staples | toenail | |
2 -16d common (31/2″ × 0.162″) 3 - 3″ × 0.131″ nails 3 - 3″ 14 gage staples | face nail | ||
29. Joist to band joist | 3 - 16d common (31/2″ × 0.162″) 4 - 3″ × 0.131″ nails 4 - 3″ 14 gage staples | face nail |
(continued)
TABLE 2304.9.1—continued
FASTENING SCHEDULE
CONNECTION | FASTENINGa, m | LOCATION | |
30.Ledger strip | 3 - 16d common (31/2″ × 0.162″) 4 - 3″ × 0.131″ nails 4 - 3″14 gage staples | face nail at each joist | |
31.Wood structural panels and particleboardb Subfloor, roof and wall sheathing (to framing) | 1/2″ and less | 6dc, 1 23/8″ × 0.113″ nailn | |
13/4″ 16 gageo | |||
19/32″ to 3/4″ | 8ddor 6de | ||
23/8″ × 0.113″ nailp | |||
2″ 16 gagep | |||
8dc | |||
7/8″ to 1″ | 10ddor 8de | ||
11/8″ to 11/4″ | |||
Single floor (combination subfloor-underlayment to framing) | 3/4″ and less | 6de | |
7/8″ to 1″ | 8de | ||
11/8″ to 11/4″ | 10dd or 8de | ||
32.Panel siding (to framing) | 1/2″ or less | 6df | |
5/8″ | 8df | ||
33.Fiberboard sheathingg | 1/2″ | No. 11 gage roofing nailh | |
6d common nail (2″ × 0.113″) | |||
No. 16 gage staplei | |||
25/32″ | No. 11 gage roofing nailh | ||
8d common nail (21/2″ × 0.131″) | |||
No. 16 gage staplei | |||
34.Interior paneling | 1/4″ | 4d j | |
3/8″ | 6dk |
Exception: Plain carbon steel fasteners, including nuts and washers, in SBX/DOT and zinc borate preservative-treated wood in an interior, dry environment shall be permitted.
Exceptions:
Exception: Untreated wood is permitted where such wood is continuously and entirely below the ground-water level or submerged in fresh water.
Exception: When a building is located in a geographical region where experience has demonstrated that climatic conditions preclude the need to use durable materials where the structure is exposed to the weather.
(Equation 23-1) |
For SI: |
where:
A | = | Area of chord cross section, in square inches (mm2). |
b | = | Diaphragm width, in feet (mm). |
E | = | Elastic modulus of chords, in pounds per square inch (N/mm2). |
en | = | Staple deformation, in inches (mm) [see Table 2305.2(1)]. |
Gt | = | Panel rigidity through the thickness, in pounds per inch (N/mm) of panel width or depth [see Table 2305.2(2)]. |
L | = | Diaphragm length, in feet (mm). |
v | = | Maximum shear due to design loads in the direction under consideration, in pounds per linear foot (plf) (N/mm). |
Δ | = | The calculated deflection, in inches (mm). |
Σ(ΔcX ) | = | Sum of individual chord-splice slip values on both sides of the diaphragm, each multiplied by its distance to the nearest support. |
TABLE 2305.2(1)
enVALUES (inches) FOR USE IN CALCULATING DIAPHRAGM
AND SHEAR WALL DEFLECTION DUE TO FASTENER SLIP
(Structural I)a, c
LOAD PER FASTENERb (pounds) | FASTENER DESIGNATIONS |
14-Ga staple x 2 inches long | |
60 | 0.011 |
80 | 0.018 |
100 | 0.028 |
120 | 0.04 |
140 | 0.053 |
160 | 0.068 |
TABLE 2305.2(2)
VALUES OF Gt FOR USE IN CALCULATING DEFLECTION OF WOOD STRUCTURAL PANEL SHEAR WALLS AND DIAPHRAGMS
PANEL TYPE | SPAN RATING | VALUES OF Gt (lb/in. panel depth or width) | |||||||
OTHER | STRUCTURAL I | ||||||||
3-ply Plywood | 4-ply Plywood | 5-ply Plywooda | OSB | 3-ply Plywood | 4-ply Plywood | 5-ply Plywooda | OSB | ||
Sheathing | 24/0 | 25,000 | 32,500 | 37,500 | 77,500 | 32,500 | 42,500 | 41,500 | 77,500 |
24/16 | 27,000 | 35,000 | 40,500 | 83,500 | 35,000 | 45,500 | 44,500 | 83,500 | |
32/16 | 27,000 | 35,000 | 40,500 | 83,500 | 35,000 | 45,500 | 44,500 | 83,500 | |
40/20 | 28,500 | 37,000 | 43,000 | 88,500 | 37,000 | 48,000 | 47,500 | 88,500 | |
48/24 | 31,000 | 40,500 | 46,500 | 96,000 | 40,500 | 52,500 | 51,000 | 96,000 | |
Single Floor | 16 o.c. | 27,000 | 35,000 | 40,500 | 83,500 | 35,000 | 45,500 | 44,500 | 83,500 |
20 o.c. | 28,000 | 36,500 | 42,000 | 87,000 | 36,500 | 47,500 | 46,000 | 87,000 | |
24 o.c. | 30,000 | 39,000 | 45,000 | 93,000 | 39,000 | 50,500 | 49,500 | 93,000 | |
32 o.c. | 36,000 | 47,000 | 54,000 | 110,000 | 47,000 | 61,000 | 59,500 | 110,000 | |
48 o.c. | 50,500 | 65,500 | 76,000 | 155,000 | 65,500 | 85,000 | 83,500 | 155,000 |
OTHER | STRUCTURAL I | ||||||
Thickness (in.) | A-A, A-C | Marine | All Other Grades | A-A, A-C | Marine | All Other Grades | |
Sanded Plywood | 1/4 | 24,000 | 31,000 | 24,000 | 31,000 | 31,000 | 31,000 |
11/32 | 25,500 | 33,000 | 25,500 | 33,000 | 33,000 | 33,000 | |
3/8 | 26,000 | 34,000 | 26,000 | 34,000 | 34,000 | 34,000 | |
15/32 | 38,000 | 49,500 | 38,000 | 49,500 | 49,500 | 49,500 | |
1/2 | 38,500 | 50,000 | 38,500 | 50,000 | 50,000 | 50,000 | |
19/32 | 49,000 | 63,500 | 49,000 | 63,500 | 63,500 | 63,500 | |
5/8 | 49,500 | 64,500 | 49,500 | 64,500 | 64,500 | 64,500 | |
23/32 | 50,500 | 65,500 | 50,500 | 65,500 | 65,500 | 65,500 | |
3/4 | 51,000 | 66,500 | 51,000 | 66,500 | 66,500 | 66,500 | |
7/8 | 52,500 | 68,500 | 52,500 | 68,500 | 68,500 | 68,500 | |
1 | 73,500 | 95,500 | 73,500 | 95,500 | 95,500 | 95,500 | |
11/8 | 75,000 | 97,500 | 75,000 | 97,500 | 97,500 | 97,500 |
(Equation 23-2) |
For SI: |
where:
A | = | Area of boundary element cross section in square inches (mm2) (vertical member at shear wall boundary). |
b | = | Wall width, in feet (mm). |
da | = | Vertical elongation of overturning anchorage (including fastener slip, device elongation, anchor rod elongation, etc.) at the design shear load (v). |
E | = | Elastic modulus of boundary element (vertical member at shear wall boundary), in pounds per square inch (N/mm2). |
en | = | Staple deformation, in inches (mm) [see Table 2305.2(1)]. |
Gt | = | Panel rigidity through the thickness, in pounds per inch (N/mm) of panel width or depth [see Table 2305.2(2)]. |
h | = | Wall height, in feet (mm). |
v | = | Maximum shear due to design loads at the top of the wall, in pounds per linear foot (N/mm). |
Δ | = | The calculated deflection, in inches (mm). |
American Forest & Paper Association. | |
NDS | National Design Specification for Wood Construction |
SDPWS | Special Design Provisions for Wind and Seismic |
American Institute of Timber Construction. | |
AITC 104 | Typical Construction Details |
AITC 110 | Standard Appearance Grades for Structural Glued Laminated Timber |
AITC 113 | Standard for Dimensions of Structural Glued Laminated Timber |
AITC 117 | Standard Specifications for Structural Glued Laminated Timber of Softwood Species |
AITC 119 | Standard Specifications for Structural Glued Laminated Timber of Hardwood Species |
ANSI/AITC A190.1 | Structural Glued Laminated Timber |
AITC 200 | Inspection Manual |
American Society of Agricultural and Biological Engineers. | |
ASABE EP 484.2 | Diaphragm Design of Metal-clad, Post- Frame Rectangular Buildings |
ASABE EP 486.1 | Shallow Post Foundation Design |
ASABE 559 | Design Requirements and Bending Properties for Mechanically Laminated Columns |
APA—The Engineered Wood Association. | |
Panel Design Specification | |
Plywood Design Specification Supplement 1— Design & Fabrication of Plywood Curved Panel | |
Plywood Design Specification Supplement 2— Design & Fabrication of Glued Plywood-lumber Beams | |
Plywood Design Specification Supplement 3— Design & Fabrication of Plywood Stressed-skin Panels | |
Plywood Design Specification Supplement 4— Design & Fabrication of Plywood Sandwich Panels | |
Plywood Design Specification Supplement 5— Design & Fabrication of All-plywood Beams | |
EWS T300 | Glulam Connection Details |
EWS S560 | Field Notching and Drilling of Glued Laminated Timber Beams |
EWS S475 | Glued Laminated Beam Design Tables |
EWS X450 | Glulam in Residential Construction |
EWS X440 | Product and Application Guide: Glulam |
EWS R540 | Builders Tips: Proper Storage and Handling of Glulam Beams |
Truss Plate Institute, Inc. | |
TPI 1 | National Design Standard for Metal Plate Connected Wood Truss Construction |
TABLE 2306.1.4
ALLOWABLE LOADS FOR LUMBER DECKING
PATTERN | ALLOWABLE AREA LOADa, b | |
Flexure | Deflection | |
Simple span | ||
Two-span continuous | ||
Combination simple- and two-span continuous | ||
Cantilevered pieces intermixed | ||
Controlled random layup | ||
Mechanically laminated decking | ||
2-inch decking | ||
3-inch and 4-inch decking |
Deleted
TABLE 2306.2(1)
ALLOWABLE SHEAR VALUES (POUNDS PER FOOT) FOR WOOD STRUCTURAL PANEL DIAPHRAGMS UTILIZING STAPLES
WITH FRAMING OF DOUGLAS FIR-LARCH, OR SOUTHERN PINEa FOR WIND OR SEISMIC LOADINGf
PANEL GRADE | STAPLE LENGTH AND GAGEd | MINIMUM FASTENER PENETRATION IN FRAMING (inches) | MINIMUM NOMINAL PANEL THICKNESS (inch) | MINIMUM NOMINAL WIDTH OF FRAMING MEMBERS AT ADJOINING PANEL EDGES AND BOUNDARIESe (inches) | BLOCKED DIAPHRAGMS | UNBLOCKED DIAPHRAGMS | ||||
Fastener spacing (inches) at diaphragm boundaries (all cases) at continuous panel edges parallel to load (Cases 3, 4), and at all panel edges (Cases 5, 6)b | Fasteners spaced 6 max. at supported edgesb | |||||||||
6 | 4 | 21/2c | 2c | Case 1 (No unblocked edges or continuous joints parallel to load) | All other configurations (Cases 2, 3, 4, 5 and 6) | |||||
Fastener spacing (inches) at other panel edges (Cases 1, 2, 3 and 4)b | ||||||||||
6 | 6 | 4 | 3 | |||||||
Deleted | ||||||||||
Structural I grades | 11/2 16 gage | 1 | 3/8 | 2 | 175 | 235 | 350 | 400 | 155 | 115 |
3 | 200 | 265 | 395 | 450 | 175 | 130 | ||||
Deleted | ||||||||||
15/32 | 2 | 175 | 235 | 350 | 400 | 155 | 120 | |||
3 | 200 | 265 | 395 | 450 | 175 | 130 | ||||
Deleted | ||||||||||
Sheathing, single floor and other grades covered in DOC PS 1 and PS 2 | 11/2 16 gage | 1 | 3/8 | 2 | 160 | 210 | 315 | 360 | 140 | 105 |
3 | 180 | 235 | 355 | 400 | 160 | 120 | ||||
Deleted | ||||||||||
7/16 | 2 | 165 | 225 | 335 | 380 | 150 | 110 | |||
3 | 190 | 250 | 375 | 425 | 165 | 125 | ||||
Deleted | ||||||||||
15/32 | 2 | 160 | 210 | 315 | 360 | 140 | 105 | |||
3 | 180 | 235 | 355 | 405 | 160 | 120 | ||||
Deleted | ||||||||||
19/32 | 2 | 175 | 235 | 350 | 400 | 155 | 115 | |||
3 | 200 | 265 | 395 | 450 | 175 | 130 |
Deleted
Deleted
TABLE 2306.2(2)
ALLOWABLE SHEAR VALUES (POUNDS PER FOOT) FOR WOOD STRUCTURAL PANEL BLOCKED DIAPHRAGMS
UTILIZING MULTIPLE ROWS OF STAPLES (HIGH-LOAD DIAPHRAGMS) WITH FRAMING OF
DOUGLAS FIR-LARCH OR SOUTHERN PINEa FOR WIND OR SEISMIC LOADINGb, g, h
PANEL GRADEc | STAPLE GAGEf | MINIMUM FASTENER PENETRATION IN FRAMING (inches) | MINIMUM NOMINAL PANEL THICKNESS (inch) | MINIMUM NOMINAL WIDTH OF FRAMING MEMBER AT ADJOINING PANEL EDGES AND BOUNDARIESe | LINES OF FASTENERS | BLOCKED DIAPHRAGMS | |||||||
Cases 1 and 2d | |||||||||||||
Fastener Spacing Per Line at Boundaries (inches) | |||||||||||||
4 | 21/2 | 2 | |||||||||||
Fastener Spacing Per Line at Other Panel Edges (inches) | |||||||||||||
6 | 4 | 4 | 3 | 3 | 2 | ||||||||
Deleted | |||||||||||||
Structural I grades | 14 gage staples | 2 | 15/32 | 3 | 2 | 600 | 600 | 860 | 960 | 1,060 | 1,200 | ||
4 | 3 | 860 | 900 | 1,160 | 1,295 | 1,295 | 1,400 | ||||||
19/32 | 3 | 2 | 600 | 600 | 875 | 960 | 1,075 | 1,200 | |||||
4 | 3 | 875 | 900 | 1,175 | 1,440 | 1,475 | 1,795 | ||||||
Deleted | |||||||||||||
Sheathing single floor and other grades covered in DOC PS 1 and PS 2 | 14 gage staples | 2 | 15/32 | 3 | 2 | 540 | 540 | 735 | 865 | 915 | 1,080 | ||
4 | 3 | 735 | 810 | 1,005 | 1,105 | 1,105 | 1,195 | ||||||
19/32 | 3 | 2 | 600 | 600 | 865 | 960 | 1,065 | 1,200 | |||||
4 | 3 | 865 | 900 | 1,130 | 1,430 | 1,370 | 1,485 | ||||||
23/32 | 4 | 3 | 865 | 900 | 1,130 | 1,490 | 1,430 | 1,545 |
(continued)
TABLE 2306.2(2)—continued
ALLOWABLE SHEAR VALUES (POUNDS PER FOOT) FOR WOOD STRUCTURAL PANEL BLOCKED DIAPHRAGMS
UTILIZING MULTIPLE ROWS OF STAPLES (HIGH-LOAD DIAPHRAGMS) WITH FRAMING OF
DOUGLAS FIR-LARCH OR SOUTHERN PINE FOR WIND OR SEISMIC LOADING
Deleted
TABLE 2306.3(1)
ALLOWABLE SHEAR VALUES (POUNDS PER FOOT) FOR WOOD STRUCTURAL PANEL SHEAR WALLS UTILIZING STAPLES WITH FRAMING OF DOUGLAS FIR-LARCH OR SOUTHERN PINEa FOR WIND OR SEISMIC LOADINGb, f, g, i
PANEL GRADE | MINIMUM NOMINAL PANEL THICKNESS (inch) | MINIMUM FASTENER PENETRATION IN FRAMING (inches) | PANELS APPLIED DIRECT TO FRAMING | PANELS APPLIED OVER 1/2" OR5/8" GYPSUM SHEATHING | ||||||||
Staple sizeh | Fastener spacing at panel edges (inches) | Staple sizeh | Fastener spacing at panel edges (inches) | |||||||||
6 | 4 | 3 | 2d | 6 | 4 | 3 | 2 d | |||||
Deleted | ||||||||||||
Structural I sheathing | 3/8 | 1 | 11/216 Gage | 155 | 235 | 315 | 400 | 2 16 Gage | 155 | 235 | 310 | 400 |
Deleted | ||||||||||||
7/16 | 170 | 260 | 345 | 440 | 155 | 235 | 310 | 400 | ||||
Deleted | ||||||||||||
15/32 | 185 | 280 | 375 | 475 | 155 | 235 | 300 | 400 | ||||
Deleted | ||||||||||||
Sheathing, plywood sidinge except Group 5 Species, ANSI/APA PRP 210 siding | 5/16c or 1/4c | 1 | 11/216 Gage | 145 | 220 | 295 | 375 | 2 16 Gage | 110 | 165 | 220 | 285 |
Deleted | ||||||||||||
3/8 | 140 | 210 | 280 | 360 | 140 | 210 | 280 | 360 | ||||
Deleted | ||||||||||||
7/16 | 155 | 230 | 310 | 395 | 140 | 210 | 280 | 360 | ||||
Deleted | ||||||||||||
15/32 | 170 | 255 | 335 | 430 | 140 | 210 | 280 | 360 | ||||
Deleted | ||||||||||||
19/32 | 13/416 Gage | 185 | 280 | 375 | 475 | — | — | — | — | — |
Deleted
Deleted
Deleted
Deleted
Deleted
TABLE 2306.3(2)
ALLOWABLE SHEAR VALUES (plf) FOR WIND OR SEISMIC LOADING ON SHEAR WALLS OF FIBERBOARD
SHEATHING BOARD CONSTRUCTION UTILIZING STAPLES FOR TYPE V CONSTRUCTION ONLYa, b, c, d, e
THICKNESS AND GRADE | FASTENER SIZE | ALLOWABLE SHEAR VALUE (pounds per linear foot) STAPLE SPACING AT PANEL EDGES (inches)a | ||
4 | 3 | 2 | ||
Deleted | ||||
1/2″ or 25/32″ Structural | No. 11 gage galvanized staple, 7/16″ crownf | 150 | 200 | 225 |
No. 11 gage galvanized staple, 1″ crownf | 220 | 290 | 325 |
Deleted
Deleted
TABLE 2306.3(3)
ALLOWABLE SHEAR VALUES FOR WIND OR SEISMIC FORCES FOR SHEAR WALLS OF LATH AND PLASTER OR GYPSUM BOARD WOOD FRAMED WALL ASSEMBLIES UTILIZING STAPLES
TYPE OF MATERIAL | THICKNESS OF MATERIAL | WALL CONSTRUCTION | STAPLE SPACINGb MAXIMU (inches) | SHEAR VALUEa, c (plf) | MINIMUM STAPLE SIZEf, g |
1. Expanded metal or woven wire lath and Portland cement plaster | 7/8″ | Unblocked | 6 | 180 | No. 16 gage galv. staple,7/8″ legs |
Deleted | |||||
2. Gypsum lath, plain or perforated | 3/8″ lath and 1/2″ plaster | Unblocked | 5 | 100 | No. 16 gage galv. staple, 11/8″ long |
3. Gypsum sheating | 1/2″× 2' × 8' | Unblocked | 4 | 75 | No. 16 gage galv. staple, 13/4″ long |
1/2″ × 4' | Blockedd Unblocked | 4 7 | 175 100 | ||
4. Gypsum board, gypsum veneer base or water-resistant gypsum backing board | 1/2″ | Unblockedd | 7 | 75 | No. 16 gage galv. staple, 11/2″ long |
Unblockedd | 4 | 110 | |||
Unblocked | 7 | 100 | |||
Unblocked | 4 | 125 | |||
Blockede | 7 | 125 | |||
Blockede | 4 | 150 | |||
Deleted | |||||
5/8″ | Unblockedd | 7 | 115 | No. 16 gage galv. staple, 11/2 ″ legs,15/8″ long | |
4 | 145 | ||||
Blockede | 7 | 145 | |||
4 | 175 | ||||
Blockede Two-ply | Base ply: 9 Face ply: 7 | 250 | No. 16 gage galv. staple 15/8″ long No. 15 gage galv. staple, 21/4″ long |
Deleted
Deleted
Deleted
Deleted
Exception: Solid blocked cripple walls not exceeding 14 inches (356 mm) in height need not be considered a story.
Exceptions:
Exception: Vasd as determined in accordance with Section 1609.3.1 shall not exceed 110 mph (48.4 m/s) (3-second gust) for buildings in Exposure Category B that are not located in a hurricane-prone region.
At exterior gable end walls braced wall panel sheathing in the top story shall be extended and fastened to roof framing where the spacing between parallel exterior braced wall lines is greater than 50 feet (15 240 mm).
Where roof trusses are used and are installed perpendicular to an exterior braced wall line, lateral forces shall be transferred from the roof diaphragm to the braced wall over the full length of the braced wall line by blocking of the ends of the trusses or by other approved methods providing equivalent lateral force transfer. Blocking shall be minimum 2 inches (51 mm) nominal thickness and shall extend to within 2 inches (51 mm) from the roof sheathing above and shall be fastened to the braced wall line top plate as specified in Table 2304.9.1, Item 11. Notching or drilling of holes in blocking in accordance with the requirements of Section 2308.8.2 or Section 2308.10.4.2 shall be permitted.
Exception: For structures with a maximum plan dimension not over 50 feet (15 240 mm), continuous foundations are required at exterior walls only.
Where a girder is spliced over a support, an adequate tie shall be provided. The ends of beams or girders supported on masonry or concrete shall not have less than 3 inches (76 mm) of bearing.
TABLE 2308.8(1)
FLOOR JOIST SPANS FOR COMMON LUMBER SPECIES
(Residential Sleeping Areas, Live Load = 30 psf, L/Δ = 360)
JOIST SPACING (inches) | SPECIES AND GRADE | DEAD LOAD = 10 psf | DEAD LOAD = 20 psf | |||||||
2x6 | 2x8 | 2x10 | 2x12 | 2x6 | 2x8 | 2x10 | 2x12 | |||
Maximum floor joist spans | ||||||||||
(ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | |||
12 | Douglas Fir-Larch | SS | 12-6 | 16-6 | 21-0 | 25-7 | 12-6 | 16-6 | 21-0 | 25-7 |
Douglas Fir-Larch | #1 | 12-0 | 15-10 | 20-3 | 24-8 | 12-0 | 15-7 | 19-0 | 22-0 | |
Douglas Fir-Larch | #2 | 11-10 | 15-7 | 19-10 | 23-0 | 11-6 | 14-7 | 17-9 | 20-7 | |
Douglas Fir-Larch | #3 | 9-8 | 12-4 | 15-0 | 17-5 | 8-8 | 11-0 | 13-5 | 15-7 | |
Hem-Fir | SS | 11-10 | 15-7 | 19-10 | 24-2 | 11-10 | 15-7 | 19-10 | 24-2 | |
Hem-Fir | #1 | 11-7 | 15-3 | 19-5 | 23-7 | 11-7 | 15-2 | 18-6 | 21-6 | |
Hem-Fir | #2 | 11-0 | 14-6 | 18-6 | 22-6 | 11-0 | 14-4 | 17-6 | 20-4 | |
Hem-Fir | #3 | 9-8 | 12-4 | 15-0 | 17-5 | 8-8 | 11-0 | 13-5 | 15-7 | |
Southern Pine | SS | 12-3 | 16-2 | 20-8 | 25-1 | 12-3 | 16-2 | 20-8 | 25-1 | |
Southern Pine | #1 | 12-0 | 15-10 | 20-3 | 24-8 | 12-0 | 15-10 | 20-3 | 24-8 | |
Southern Pine | #2 | 11-10 | 15-7 | 19-10 | 24-2 | 11-10 | 15-7 | 18-7 | 21-9 | |
Southern Pine | #3 | 10-5 | 13-3 | 15-8 | 18-8 | 9-4 | 11-11 | 14-0 | 16-8 | |
Spruce-Pine-Fir | SS | 11-7 | 15-3 | 19-5 | 23-7 | 11-7 | 15-3 | 19-5 | 23-7 | |
Spruce-Pine-Fir | #1 | 11-3 | 14-11 | 19-0 | 23-0 | 11-3 | 14-7 | 17-9 | 20-7 | |
Spruce-Pine-Fir | #2 | 11-3 | 14-11 | 19-0 | 23-0 | 11-3 | 14-7 | 17-9 | 20-7 | |
Spruce-Pine-Fir | #3 | 9-8 | 12-4 | 15-0 | 17-5 | 8-8 | 11-0 | 13-5 | 15-7 | |
16 | Douglas Fir-Larch | SS | 11-4 | 15-0 | 19-1 | 23-3 | 11-4 | 15-0 | 19-1 | 23-0 |
Douglas Fir-Larch | #1 | 10-11 | 14-5 | 18-5 | 21-4 | 10-8 | 13-6 | 16-5 | 19-1 | |
Douglas Fir-Larch | #2 | 10-9 | 14-1 | 17-2 | 19-11 | 9-11 | 12-7 | 15-5 | 17-10 | |
Douglas Fir-Larch | #3 | 8-5 | 10-8 | 13-0 | 15-1 | 7-6 | 9-6 | 11-8 | 13-6 | |
Hem-Fir | SS | 10-9 | 14-2 | 18-0 | 21-11 | 10-9 | 14-2 | 18-0 | 21-11 | |
Hem-Fir | #1 | 10-6 | 13-10 | 17-8 | 20-9 | 10-4 | 13-1 | 16-0 | 18-7 | |
Hem-Fir | #2 | 10-0 | 13-2 | 16-10 | 19-8 | 9-10 | 12-5 | 15-2 | 17-7 | |
Hem-Fir | #3 | 8-5 | 10-8 | 13-0 | 15-1 | 7-6 | 9-6 | 11-8 | 13-6 | |
Southern Pine | SS | 11-2 | 14-8 | 18-9 | 22-10 | 11-2 | 14-8 | 18-9 | 22-10 | |
Southern Pine | #1 | 10-11 | 14-5 | 18-5 | 22-5 | 10-11 | 14-5 | 17-11 | 21-4 | |
Southern Pine | #2 | 10-9 | 14-2 | 18-0 | 21-1 | 10-5 | 13-6 | 16-1 | 18-10 | |
Southern Pine | #3 | 9-0 | 11-6 | 13-7 | 16-2 | 8-1 | 10-3 | 12-2 | 14-6 | |
Spruce-Pine-Fir | SS | 10-6 | 13-10 | 17-8 | 21-6 | 10-6 | 13-10 | 17-8 | 21-4 | |
Spruce-Pine-Fir | #1 | 10-3 | 13-6 | 17-2 | 19-11 | 9-11 | 12-7 | 15-5 | 17-10 | |
Spruce-Pine-Fir | #2 | 10-3 | 13-6 | 17-2 | 19-11 | 9-11 | 12-7 | 15-5 | 17-10 | |
Spruce-Pine-Fir | #3 | 8-5 | 10-8 | 13-0 | 15-1 | 7-6 | 9-6 | 11-8 | 13-6 | |
19.2 | Douglas Fir-Larch | SS | 10-8 | 14-1 | 18-0 | 21-10 | 10-8 | 14-1 | 18-0 | 21-0 |
Douglas Fir-Larch | #1 | 10-4 | 13-7 | 16-9 | 19-6 | 9-8 | 12-4 | 15-0 | 17-5 | |
Douglas Fir-Larch | #2 | 10-1 | 12-10 | 15-8 | 18-3 | 9-1 | 11-6 | 14-1 | 16-3 | |
Douglas Fir-Larch | #3 | 7-8 | 9-9 | 11-10 | 13-9 | 6-10 | 8-8 | 10-7 | 12-4 | |
Hem-Fir | SS | 10-1 | 13-4 | 17-0 | 20-8 | 10-1 | 13-4 | 17-0 | 20-7 | |
Hem-Fir | #1 | 9-10 | 13-0 | 16-4 | 19-0 | 9-6 | 12-0 | 14-8 | 17-0 | |
Hem-Fir | #2 | 9-5 | 12-5 | 15-6 | 17-1 | 8-11 | 11-4 | 13-10 | 16-1 | |
Hem-Fir | #3 | 7-8 | 9-9 | 11-10 | 13-9 | 6-10 | 8-8 | 10-7 | 12-4 |
(continued)
TABLE 2308.8(1)—continued
FLOOR JOIST SPANS FOR COMMON LUMBER SPECIES
(Residential Sleeping Areas, Live Load = 30 psf, L/Δ = 360)
JOIST SPACING (inches) | SPECIES AND GRADE | DEAD LOAD = 10 psf | DEAD LOAD = 20 psf | |||||||
2x6 | 2x8 | 2x10 | 2x12 | 2x6 | 2x8 | 2x10 | 2x12 | |||
Maximum floor joist spans | ||||||||||
(ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | |||
19.2 | Southern Pine | SS | 10-6 | 13-10 | 17-8 | 21-6 | 10-6 | 13-10 | 17-8 | 21-6 |
Southern Pine | #1 | 10-4 | 13-7 | 17-4 | 21-1 | 10-4 | 13-7 | 16-4 | 19-6 | |
Southern Pine | #2 | 10-1 | 13-4 | 16-5 | 19-3 | 9-6 | 12-4 | 14-8 | 17-2 | |
Southern Pine | #3 | 8-3 | 10-6 | 12-5 | 14-9 | 7-4 | 9-5 | 11-1 | 13-2 | |
Spruce-Pine-Fir | SS | 9-10 | 13-0 | 16-7 | 20-2 | 9-10 | 13-0 | 16-7 | 19-6 | |
Spruce-Pine-Fir | #1 | 9-8 | 12-9 | 15-8 | 18-3 | 9-1 | 11-6 | 14-1 | 16-3 | |
Spruce-Pine-Fir | #2 | 9-8 | 12-9 | 15-8 | 18-3 | 9-1 | 11-6 | 14-1 | 16-3 | |
Spruce-Pine-Fir | #3 | 7-8 | 9-9 | 11-10 | 13-9 | 6-10 | 8-8 | 10-7 | 12-4 | |
24 | Douglas Fir-Larch | SS | 9-11 | 13-1 | 16-8 | 20-3 | 9-11 | 13-1 | 16-2 | 18-9 |
Douglas Fir-Larch | #1 | 9-7 | 12-4 | 15-0 | 17-5 | 8-8 | 11-0 | 13-5 | 15-7 | |
Douglas Fir-Larch | #2 | 9-1 | 11-6 | 14-1 | 16-3 | 8-1 | 10-3 | 12-7 | 14-7 | |
Douglas Fir-Larch | #3 | 6-10 | 8-8 | 10-7 | 12-4 | 6-2 | 7-9 | 9-6 | 11-0 | |
Hem-Fir | SS | 9-4 | 12-4 | 15-9 | 19-2 | 9-4 | 12-4 | 15-9 | 18-5 | |
Hem-Fir | #1 | 9-2 | 12-0 | 14-8 | 17-0 | 8-6 | 10-9 | 13-1 | 15-2 | |
Hem-Fir | #2 | 8-9 | 11-4 | 13-10 | 16-1 | 8-0 | 10-2 | 12-5 | 14-4 | |
Hem-Fir | #3 | 6-10 | 8-8 | 10-7 | 12-4 | 6-2 | 7-9 | 9-6 | 11-0 | |
Southern Pine | SS | 9-9 | 12-10 | 16-5 | 19-11 | 9-9 | 12-10 | 16-5 | 19-11 | |
Southern Pine | #1 | 9-7 | 12-7 | 16-1 | 19-6 | 9-7 | 12-4 | 14-7 | 17-5 | |
Southern Pine | #2 | 9-4 | 12-4 | 14-8 | 17-2 | 8-6 | 11-0 | 13-1 | 15-5 | |
Southern Pine | #3 | 7-4 | 9-5 | 11-1 | 13-2 | 6-7 | 8-5 | 9-11 | 11-10 | |
Spruce-Pine-Fir | SS | 9-2 | 12-1 | 15-5 | 18-9 | 9-2 | 12-1 | 15-0 | 17-5 | |
Spruce-Pine-Fir | #1 | 8-11 | 11-6 | 14-1 | 16-3 | 8-1 | 10-3 | 12-7 | 14-7 | |
Spruce-Pine-Fir | #2 | 8-11 | 11-6 | 14-1 | 16-3 | 8-1 | 10-3 | 12-7 | 14-7 | |
Spruce-Pine-Fir | #3 | 6-10 | 8-8 | 10-7 | 12-4 | 6-2 | 7-9 | 9-6 | 11-0 |
Deleted
TABLE 2308.8(2)
FLOOR JOIST SPANS FOR COMMON LUMBER SPECIES
(Residential Living Areas, Live Load = 40 psf, L/Δ = 360)
JOIST SPACING (inches) | SPECIES AND GRADE | DEAD LOAD = 10 psf | DEAD LOAD = 20 psf | ||||||||
2x6 | 2x8 | 2x10 | 2x12 | 2x6 | 2x8 | 2x10 | 2x12 | ||||
Maximum floor joist spans | |||||||||||
(ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | ||||
12 | Douglas Fir-Larch | SS | 11-4 | 15-0 | 19-1 | 23-3 | 11-4 | 15-0 | 19-1 | 23-3 | |
Douglas Fir-Larch | #1 | 10-11 | 14-5 | 18-5 | 22-0 | 10-11 | 14-2 | 17-4 | 20-1 | ||
Douglas Fir-Larch | #2 | 10-9 | 14-2 | 17-9 | 20-7 | 10-6 | 13-3 | 16-3 | 18-10 | ||
Douglas Fir-Larch | #3 | 8-8 | 11-0 | 13-5 | 15-7 | 7-11 | 10-0 | 12-3 | 14-3 | ||
Hem-Fir | SS | 10-9 | 14-2 | 18-0 | 21-11 | 10-9 | 14-2 | 18-0 | 21-11 | ||
Hem-Fir | #1 | 10-6 | 13-10 | 17-8 | 21-6 | 10-6 | 13-10 | 16-11 | 19-7 | ||
Hem-Fir | #2 | 10-0 | 13-2 | 16-10 | 20-4 | 10-0 | 13-1 | 16-0 | 18-6 | ||
Hem-Fir | #3 | 8-8 | 11-0 | 13-5 | 15-7 | 7-11 | 10-0 | 12-3 | 14-3 | ||
Southern Pine | SS | 11-2 | 14-8 | 18-9 | 22-10 | 11-2 | 14-8 | 18-9 | 22-10 | ||
Southern Pine | #1 | 10-11 | 14-5 | 18-5 | 22-5 | 10-11 | 14-5 | 18-5 | 22-5 | ||
Southern Pine | #2 | 10-9 | 14-2 | 18-0 | 21-9 | 10-9 | 14-2 | 16-11 | 19-10 | ||
Southern Pine | #3 | 9-4 | 11-11 | 14-0 | 16-8 | 8-6 | 10-10 | 12-10 | 15-3 | ||
Spruce-Pine-Fir | SS | 10-6 | 13-10 | 17-8 | 21-6 | 10-6 | 13-10 | 17-8 | 21-6 | ||
Spruce-Pine-Fir | #1 | 10-3 | 13-6 | 17-3 | 20-7 | 10-3 | 13-3 | 16-3 | 18-10 | ||
Spruce-Pine-Fir | #2 | 10-3 | 13-6 | 17-3 | 20-7 | 10-3 | 13-3 | 16-3 | 18-10 | ||
Spruce-Pine-Fir | #3 | 8-8 | 11-0 | 13-5 | 15-7 | 7-11 | 10-0 | 12-3 | 14-3 | ||
16 | Douglas Fir-Larch | SS | 10-4 | 13-7 | 17-4 | 21-1 | 10-4 | 13-7 | 17-4 | 21-0 | |
Douglas Fir-Larch | #1 | 9-11 | 13-1 | 16-5 | 19-1 | 9-8 | 12-4 | 15-0 | 17-5 | ||
Douglas Fir-Larch | #2 | 9-9 | 12-7 | 15-5 | 17-10 | 9-1 | 11-6 | 14-1 | 16-3 | ||
Douglas Fir-Larch | #3 | 7-6 | 9-6 | 11-8 | 13-6 | 6-10 | 8-8 | 10-7 | 12-4 | ||
Hem-Fir | SS | 9-9 | 12-10 | 16-5 | 19-11 | 9-9 | 12-10 | 16-5 | 19-11 | ||
Hem-Fir | #1 | 9-6 | 12-7 | 16-0 | 18-7 | 9-6 | 12-0 | 14-8 | 17-0 | ||
Hem-Fir | #2 | 9-1 | 12-0 | 15-2 | 17-7 | 8-11 | 11-4 | 13-10 | 16-1 | ||
Hem-Fir | #3 | 7-6 | 9-6 | 11-8 | 13-6 | 6-10 | 8-8 | 10-7 | 12-4 | ||
Southern Pine | SS | 10-2 | 13-4 | 17-0 | 20-9 | 10-2 | 13-4 | 17-0 | 20-9 | ||
Southern Pine | #1 | 9-11 | 13-1 | 16-9 | 20-4 | 9-11 | 13-1 | 16-4 | 19-6 | ||
Southern Pine | #2 | 9-9 | 12-10 | 16-1 | 18-10 | 9-6 | 12-4 | 14-8 | 17-2 | ||
Southern Pine | #3 | 8-1 | 10-3 | 12-2 | 14-6 | 7-4 | 9-5 | 11-1 | 13-2 | ||
Spruce-Pine-Fir | SS | 9-6 | 12-7 | 16-0 | 19-6 | 9-6 | 12-7 | 16-0 | 19-6 | ||
Spruce-Pine-Fir | #1 | 9-4 | 12-3 | 15-5 | 17-10 | 9-1 | 11-6 | 14-1 | 16-3 | ||
Spruce-Pine-Fir | #2 | 9-4 | 12-3 | 15-5 | 17-10 | 9-1 | 11-6 | 14-1 | 16-3 | ||
Spruce-Pine-Fir | #3 | 7-6 | 9-6 | 11-8 | 13-6 | 6-10 | 8-8 | 10-7 | 12-4 | ||
19.2 | Douglas Fir-Larch | SS | 9-8 | 12-10 | 16-4 | 19-10 | 9-8 | 12-10 | 16-4 | 19-2 | |
Douglas Fir-Larch | #1 | 9-4 | 12-4 | 15-0 | 17-5 | 8-10 | 11-3 | 13-8 | 15-11 | ||
Douglas Fir-Larch | #2 | 9-1 | 11-6 | 14-1 | 16-3 | 8-3 | 10-6 | 12-10 | 14-10 | ||
Douglas Fir-Larch | #3 | 6-10 | 8-8 | 10-7 | 12-4 | 6-3 | 7-11 | 9-8 | 11-3 | ||
Hem-Fir | SS | 9-2 | 12-1 | 15-5 | 18-9 | 9-2 | 12-1 | 15-5 | 18-9 | ||
Hem-Fir | #1 | 9-0 | 11-10 | 14-8 | 17-0 | 8-8 | 10-11 | 13-4 | 15-6 | ||
Hem-Fir | #2 | 8-7 | 11-3 | 13-10 | 16-1 | 8-2 | 10-4 | 12-8 | 14-8 | ||
Hem-Fir | #3 | 6-10 | 8-8 | 10-7 | 12-4 | 6-3 | 7-11 | 9-8 | 11-3 | ||
Southern Pine | SS | 9-6 | 12-7 | 16-0 | 19-6 | 9-6 | 12-7 | 16-0 | 19-6 | ||
Southern Pine | #1 | 9-4 | 12-4 | 15-9 | 19-2 | 9-4 | 12-4 | 14-11 | 17-9 | ||
Southern Pine | #2 | 9-2 | 12 -1 | 14-8 | 17-2 | 8-8 | 11-3 | 13-5 | 15-8 | ||
Southern Pine | #3 | 7-4 | 9-5 | 11-1 | 13-2 | 6-9 | 8-7 | 10-1 | 12-1 | ||
Spruce-Pine-Fir | SS | 9-0 | 11-10 | 15-1 | 18-4 | 9-0 | 11-10 | 15-1 | 17-9 | ||
Spruce-Pine-Fir | #1 | 8-9 | 11-6 | 14-1 | 16-3 | 8-3 | 10-6 | 12-10 | 14-10 | ||
Spruce-Pine-Fir | #2 | 8-9 | 11-6 | 14-1 | 16-3 | 8-3 | 10-6 | 12-10 | 14-10 | ||
Spruce-Pine-Fir | #3 | 6-10 | 8-8 | 10-7 | 12-4 | 6-3 | 7-11 | 9-8 | 11-3 |
(continued)
TABLE 2308.8(2)—continued
FLOOR JOIST SPANS FOR COMMON LUMBER SPECIES
(Residential Living Areas, Live Load = 40 psf, L/Δ = 360)
JOIST SPACING (inches) | SPECIES AND GRADE | DEAD LOAD = 10 psf | DEAD LOAD = 20 psf | ||||||||
2x6 | 2x8 | 2x10 | 2x12 | 2x6 | 2x8 | 2x10 | 2x12 | ||||
Maximum floor joist spans | |||||||||||
(ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | ||||
24 | Douglas Fir-Larch | SS | 9-0 | 11-11 | 15-2 | 18-5 | 9-0 | 11-11 | 14-9 | 17-1 | |
Douglas Fir-Larch | #1 | 8-8 | 11-0 | 13-5 | 15-7 | 7-11 | 10-0 | 12-3 | 14-3 | ||
Douglas Fir-Larch | #2 | 8-1 | 10-3 | 12-7 | 14-7 | 7-5 | 9-5 | 11-6 | 13-4 | ||
Douglas Fir-Larch | #3 | 6-2 | 7-9 | 9-6 | 11-0 | 5-7 | 7-1 | 8-8 | 10-1 | ||
Hem-Fir | SS | 8-6 | 11-3 | 14-4 | 17-5 | 8-6 | 11-3 | 14-4 | 16-10a | ||
Hem-Fir | #1 | 8-4 | 10-9 | 13-1 | 15-2 | 7-9 | 9-9 | 11-11 | 13-10 | ||
Hem-Fir | #2 | 7-11 | 10-2 | 12-5 | 14-4 | 7-4 | 9-3 | 11-4 | 13-1 | ||
Hem-Fir | #3 | 6-2 | 7-9 | 9-6 | 11-0 | 5-7 | 7-1 | 8-8 | 10-1 | ||
Southern Pine | SS | 8-10 | 11-8 | 14-11 | 18-1 | 8-10 | 11-8 | 14-11 | 18-1 | ||
Southern Pine | #1 | 8-8 | 11-5 | 14-7 | 17-5 | 8-8 | 11-3 | 13-4 | 15-11 | ||
Southern Pine | #2 | 8-6 | 11-0 | 13-1 | 15-5 | 7-9 | 10-0 | 12-0 | 14-0 | ||
Southern Pine | #3 | 6-7 | 8-5 | 9-11 | 11-10 | 6-0 | 7-8 | 9-1 | 10-9 | ||
Spruce-Pine-Fir | SS | 8-4 | 11-0 | 14-0 | 17-0 | 8-4 | 11-0 | 13-8 | 15-11 | ||
Spruce-Pine-Fir | #1 | 8-1 | 10-3 | 12-7 | 14-7 | 7-5 | 9-5 | 11-6 | 13-4 | ||
Spruce-Pine-Fir | #2 | 8-1 | 10-3 | 12-7 | 14-7 | 7-5 | 9-5 | 11-6 | 13-4 | ||
Spruce-Pine-Fir | #3 | 6-2 | 7-9 | 9-6 | 11-0 | 5-7 | 7-1 | 8-8 | 10-1 |
Deleted
Exception: Jack studs, trimmer studs and cripple studs at openings in walls that comply with Table 2308.9.5.
TABLE 2308.9.1
SIZE, HEIGHT AND SPACING OF WOOD STUDS
STUD SIZE (inches) | BEARING WALLS | NONBEARING WALLS | ||||
Laterally unsupported stud heighta (feet) | Supporting roof and ceiling only | Supporting one floor, roof and ceiling | Supporting two floors, roof and ceiling | Laterally unsupported stud heighta (feet) | Spacing (inches) | |
Spacing (inches) | ||||||
2 × 3b | — | — | — | — | 10 | 16 |
2 × 4 | 10 | 24 | 16 | — | 14 | 24 |
3 × 4 | 10 | 24 | 24 | 16 | 14 | 24 |
2 × 5 | 10 | 24 | 24 | — | 16 | 24 |
2 × 6 | 10 | 24 | 24 | 16 | 20 | 24 |
Exception: At corners, two studs are permitted, provided wood spacers or backup cleats of 3/8-inch-thick (9.5 mm) wood structural panel, 3/8-inch (9.5 mm) Type M “Exterior Glue” particleboard, 1-inch-thick (25 mm) lumber or other approved devices that will serve as an adequate backing for the attachment of facing materials are used. Where fire-resistance ratings or shear values are involved, wood spacers, backup cleats or other devices shall not be used unless specifically approved for such use.
Exception: A single top plate is permitted, provided the plate is adequately tied at joints, corners and intersecting walls by at least the equivalent of 3-inch by 6-inch (76 mm by 152 mm) by 0.036-inch-thick (0.914 mm) galvanized steel that is nailed to each wall or segment of wall by six 8d nails or equivalent, provided the rafters, joists or trusses are centered over the studs with a tolerance of no more than 1 inch (25 mm).
For cripple wall bracing, see Section 2308.9.4.1. For Methods 2, 3, 4, 6, 7 and 8, each panel must be at least 48 inches (1219 mm) in length, covering three stud spaces where studs are spaced 16 inches (406 mm) apart and covering two stud spaces where studs are spaced 24 inches (610 mm) apart.
For Method 5, each panel must be at least 96 inches (2438 mm) in length where applied to one face of a panel and 48 inches (1219 mm) where applied to both faces. All vertical joints of panel sheathing shall occur over studs and adjacent panel joints shall be nailed to common framing members. Horizontal joints shall occur over blocking or other framing equal in size to the studding except where waived by the installation requirements for the specific sheathing materials. Sole plates shall be nailed to the floor framing and top plates shall be connected to the framing above in accordance with Section 2308.3.2. Where joists are perpendicular to braced wall lines above, blocking shall be provided under and in line with the braced wall panels.
SEISMIC DESIGN CATEGORY | MAXIMUM WALL SPACING (feet) | REQUIRED BRACING LENGTH, b |
A, B and C | 35'-0″ | Table 2308.9.3(1) and Section 2308.9.3 |
D and E | 25'-0″ | Table 2308.12.4 |
FIGURE 2308.9.3
BASIC COMPONENTS OF THE LATERAL BRACING SYSTEM
TABLE 2308.9.3(1)
BRACED WALL PANELSa
SEISMIC DESIGN CATEGORY | CONDITION | CONSTRUCTION METHODSb, c | BRACED PANEL LOCATION AND LENGTHd | |||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |||
A and B | One story, top of two or three story | X | X | X | X | X | X | X | X | Located in accordance with Section 2308.9.3 and not more than 25 feet on center. |
First story of two story or second story of three story | X | X | X | X | X | X | X | X | ||
First story of three story | — | X | X | X | Xe | X | X | X | ||
C | One story or top of two story | — | X | X | X | X | X | X | X | Located in accordance with Section 2308.9.3 and not more than 25 feet on center. |
First story of two story | — | X | X | X | Xe | X | X | X | Located in accordance with Section 2308.9.3 and not more than 25 feet on center, but total length shall not be less than 25% of building lengthf. |
TABLE 2308.9.3(2)
EXPOSED PLYWOOD PANEL SIDING
MINIMUM THICKNESSa (inch) | MINIMUM NUMBER OF PLIES | STUD SPACING (inches) Plywood siding applied directly to studs or over sheathing |
3/8 | 3 | 16b |
1/2 | 4 | 24 |
TABLE 2308.9.3(3)
WOOD STRUCTURAL PANEL WALL SHEATHINGb
(Not Exposed to the Weather, Strength Axis Parallel or Perpendicular to Studs Except as Indicated Below)
MINIMUM THICKNESS (inch) | PANEL SPAN RATING | STUD SPACING (inches) | ||
Siding nailed to studs | Nailable sheathing | |||
Sheathing parallel to studs | Sheathing perpendicular to studs | |||
3/8,15/32, 1/2 | 16/0, 20/0, 24/0, 32/16 Wall—24″ o.c. | 24 | 16 | 24 |
7/16,15/32, 1/2 | 24/0, 24/16, 32/16 Wall—24″ o.c. | 24 | 24a | 24 |
TABLE 2308.9.3(4)
ALLOWABLE SPANS FOR PARTICLEBOARD WALL SHEATHING
(Not Exposed to the Weather, Long Dimension of the Panel Parallel or Perpendicular to Studs)
GRADE | THICKNESS (inch) | STUD SPACING (inches) | |
Siding nailed to studs | Sheathing under coverings specified in Section 2308.9.3 parallel or perpendicular to studs | ||
M-S “Exterior Glue“ and M-2 “Exterior Glue“ | 3/8 | 16 | — |
1/2 | 16 | 16 |
TABLE 2308.9.3(5)
HARDBOARD SIDING
SIDING | MINIMUM NOMINAL THICKNESS (inch) | 2 × 4 FRAMING MAXIMUM SPACING | NAIL SIZEa, b, d | NAIL SPACING | |
General | Bracing panelsc | ||||
1. Lap siding | |||||
Direct to studs | 3/8 | 16″ o.c. | 8d | 16″ o.c. | Not applicable |
Over sheathing | 3/8 | 16″ o.c. | 10d | 16″ o.c. | Not applicable |
2. Square edge panel siding | |||||
Direct to studs | 3/8 | 24″ o.c. | 6d | 6″ o.c. edges; 12″ o.c. at intermediate supports | 4″ o.c. edges; 8″ o.c. at intermediate supports |
Over sheathing | 3/8 | 24″ o.c. | 8d | 6″ o.c. edges; 12″ o.c. at intermediate supports | 4″ o.c. edges; 8″ o.c. at intermediate supports |
3. Shiplap edge panel siding | |||||
Direct to studs | 3/8 | 16″ o.c. | 6d | 6″ o.c. edges; 12″ o.c. at intermediate supports | 4″ o.c. edges; 8″ o.c. at intermediate supports |
Over sheathing | 3/8 | 16″ o.c. | 8d | 6″ o.c. edges; 12″ o.c. at intermediate supports | 4″ o.c. edges; 8″ o.c. at intermediate supports |
Panel Siding (inch) | Lap Siding (inch) | |
Shank diameter Head diameter | 0.092 0.225 | 0.099 0.240 |
Where the continuous foundation is required to have a depth greater than 12 inches (305 mm), a minimum 12-inch by 12-inch (305 mm by 305 mm) continuous footing or turned down slab edge is permitted at door openings in the braced wall line. This continuous footing or turned down slab edge shall be reinforced with not less than one No. 4 bar top and bottom. This reinforcement shall be lapped 15 inches (381 mm) with the reinforcement required in the continuous foundation located directly under the braced wall line.
Where a panel is located on one side of the opening, the header shall extend between the inside face of the first full-length stud of the panel and the bearing studs at the other end of the opening. A strap with an uplift capacity of not less than 1,000 pounds (4400 N) shall fasten the header to the bearing studs. The bearing studs shall also have a tie-down device fastened to the foundation with an uplift capacity of not less than 1,000 pounds (4400 N).
The tie-down devices shall be an embedded strap type, installed in accordance with the manufacturer's recommendations. The panels shall be supported directly on a foundation that is continuous across the entire length of the braced wall line. This foundation shall be reinforced with not less than one No. 4 bar top and bottom.
Where the continuous foundation is required to have a depth greater than 12 inches (305 mm), a minimum 12-inch by 12-inch (305 mm by 305 mm) continuous footing or turned down slab edge is permitted at door openings in the braced wall line. This continuous footing or turned down slab edge shall be reinforced with not less than one No. 4 bar top and bottom. This reinforcement shall be lapped not less than 15 inches (381 mm) with the reinforcement required in the continuous foundation located directly under the braced wall line.
FIGURE 2308.9.3.2
ALTERNATE BRACED WALL PANEL ADJACENT TO A DOOR OR WINDOW OPENING
TABLE 2308.9.5
HEADER AND GIRDER SPANSa FOR EXTERIOR BEARING WALLS
(Maximum Spans for Douglas Fir-Larch, Hem-Fir, Southern Pine and Spruce-Pine-Firb and Required Number of Jack Studs)
HEADERS SUPPORTING | SIZE | GROUND SNOW LOAD (psf)e | |||||||||||
30 | 50 | ||||||||||||
Building widthc (feet) | |||||||||||||
20 | 28 | 36 | 20 | 28 | 36 | ||||||||
Span | NJd | Span | NJd | Span | NJd | Span | NJd | Span | NJd | Span | NJd | ||
Roof & Ceiling | 2-2×4 | 3-6 | 1 | 3-2 | 1 | 2-10 | 1 | 3-2 | 1 | 2-9 | 1 | 2-6 | 1 |
2-2×6 | 5-5 | 1 | 4-8 | 1 | 4-2 | 1 | 4-8 | 1 | 4-1 | 1 | 3-8 | 2 | |
2-2×8 | 6-10 | 1 | 5-11 | 2 | 5-4 | 2 | 5-11 | 2 | 5-2 | 2 | 4-7 | 2 | |
2-2×10 | 8-5 | 2 | 7-3 | 2 | 6-6 | 2 | 7-3 | 2 | 6-3 | 2 | 5-7 | 2 | |
2-2×12 | 9-9 | 2 | 8-5 | 2 | 7-6 | 2 | 8-5 | 2 | 7-3 | 2 | 6-6 | 2 | |
3-2×8 | 8-4 | 1 | 7-5 | 1 | 6-8 | 1 | 7-5 | 1 | 6-5 | 2 | 5-9 | 2 | |
3-2×10 | 10-6 | 1 | 9-1 | 2 | 8-2 | 2 | 9-1 | 2 | 7-10 | 2 | 7-0 | 2 | |
3-2×12 | 12-2 | 2 | 10-7 | 2 | 9-5 | 2 | 10-7 | 2 | 9-2 | 2 | 8-2 | 2 | |
4-2×8 | 9-2 | 1 | 8-4 | 1 | 7-8 | 1 | 8-4 | 1 | 7-5 | 1 | 6-8 | 1 | |
4-2×10 | 11-8 | 1 | 10-6 | 1 | 9-5 | 2 | 10-6 | 1 | 9-1 | 2 | 8-2 | 2 | |
4-2×12 | 14-1 | 1 | 12-2 | 2 | 10-11 | 2 | 12-2 | 2 | 10-7 | 2 | 9-5 | 2 | |
Roof, Ceiling & 1 Center-Bearing Floor | 2-2×4 | 3-1 | 1 | 2-9 | 1 | 2-5 | 1 | 2-9 | 1 | 2-5 | 1 | 2-2 | 1 |
2-2×6 | 4-6 | 1 | 4-0 | 1 | 3-7 | 2 | 4-1 | 1 | 3-7 | 2 | 3-3 | 2 | |
2-2×8 | 5-9 | 2 | 5-0 | 2 | 4-6 | 2 | 5-2 | 2 | 4-6 | 2 | 4-1 | 2 | |
2-2×10 | 7-0 | 2 | 6-2 | 2 | 5-6 | 2 | 6-4 | 2 | 5-6 | 2 | 5-0 | 2 | |
2-2×12 | 8-1 | 2 | 7-1 | 2 | 6-5 | 2 | 7-4 | 2 | 6-5 | 2 | 5-9 | 3 | |
3-2×8 | 7-2 | 1 | 6-3 | 2 | 5-8 | 2 | 6-5 | 2 | 5-8 | 2 | 5-1 | 2 | |
3-2×10 | 8-9 | 2 | 7-8 | 2 | 6-11 | 2 | 7-11 | 2 | 6-11 | 2 | 6-3 | 2 | |
3-2×12 | 10-2 | 2 | 8-11 | 2 | 8-0 | 2 | 9-2 | 2 | 8-0 | 2 | 7-3 | 2 | |
4-2×8 | 8-1 | 1 | 7-3 | 1 | 6-7 | 1 | 7-5 | 1 | 6-6 | 1 | 5-11 | 2 | |
4-2×10 | 10-1 | 1 | 8-10 | 2 | 8-0 | 2 | 9-1 | 2 | 8-0 | 2 | 7-2 | 2 | |
4-2×12 | 11-9 | 2 | 10-3 | 2 | 9-3 | 2 | 10-7 | 2 | 9-3 | 2 | 8-4 | 2 | |
Roof, Ceiling & 1 Clear Span Floor | 2-2×4 | 2-8 | 1 | 2-4 | 1 | 2-1 | 1 | 2-7 | 1 | 2-3 | 1 | 2-0 | 1 |
2-2×6 | 3-11 | 1 | 3-5 | 2 | 3-0 | 2 | 3-10 | 2 | 3-4 | 2 | 3-0 | 2 | |
2-2×8 | 5-0 | 2 | 4-4 | 2 | 3-10 | 2 | 4-10 | 2 | 4-2 | 2 | 3-9 | 2 | |
2-2×10 | 6-1 | 2 | 5-3 | 2 | 4-8 | 2 | 5-11 | 2 | 5-1 | 2 | 4-7 | 3 | |
2-2×12 | 7-1 | 2 | 6-1 | 3 | 5-5 | 3 | 6-10 | 2 | 5-11 | 3 | 5-4 | 3 | |
3-2×8 | 6-3 | 2 | 5-5 | 2 | 4-10 | 2 | 6-1 | 2 | 5-3 | 2 | 4-8 | 2 | |
3-2×10 | 7-7 | 2 | 6-7 | 2 | 5-11 | 2 | 7-5 | 2 | 6-5 | 2 | 5-9 | 2 | |
3-2×12 | 8-10 | 2 | 7-8 | 2 | 6-10 | 2 | 8-7 | 2 | 7-5 | 2 | 6-8 | 2 | |
4-2×8 | 7-2 | 1 | 6-3 | 2 | 5-7 | 2 | 7-0 | 1 | 6-1 | 2 | 5-5 | 2 | |
4-2×10 | 8-9 | 2 | 7-7 | 2 | 6-10 | 2 | 8-7 | 2 | 7-5 | 2 | 6-7 | 2 | |
4-2×12 | 10-2 | 2 | 8-10 | 2 | 7-11 | 2 | 9-11 | 2 | 8-7 | 2 | 7-8 | 2 |
(continued)
TABLE 2308.9.5—continued
HEADER AND GIRDER SPANSa FOR EXTERIOR BEARING WALLS
(Maximum Spans for Douglas Fir-Larch, Hem-Fir, Southern Pine and Spruce-Pine-Firb and Required Number of Jack Studs)
HEADERS SUPPORTING | SIZE | GROUND SNOW LOAD (psf)e | |||||||||||
30 | 50 | ||||||||||||
Building widthc (feet) | |||||||||||||
20 | 28 | 36 | 20 | 28 | 36 | ||||||||
Span | NJd | Span | NJd | Span | NJd | Span | NJd | Span | NJd | Span | NJd | ||
Roof, Ceiling & 2 Center- Bearing Floors | 2-2×4 | 2-7 | 1 | 2-3 | 1 | 2-0 | 1 | 2-6 | 1 | 2-2 | 1 | 1-11 | 1 |
2-2×6 | 3-9 | 2 | 3-3 | 2 | 2-11 | 2 | 3-8 | 2 | 3-2 | 2 | 2-10 | 2 | |
2-2×8 | 4-9 | 2 | 4-2 | 2 | 3-9 | 2 | 4-7 | 2 | 4-0 | 2 | 3-8 | 2 | |
2-2×10 | 5-9 | 2 | 5-1 | 2 | 4-7 | 3 | 5-8 | 2 | 4-11 | 2 | 4-5 | 3 | |
2-2×12 | 6-8 | 2 | 5-10 | 3 | 5-3 | 3 | 6-6 | 2 | 5-9 | 3 | 5-2 | 3 | |
3-2×8 | 5-11 | 2 | 5-2 | 2 | 4-8 | 2 | 5-9 | 2 | 5-1 | 2 | 4-7 | 2 | |
3-2×10 | 7-3 | 2 | 6-4 | 2 | 5-8 | 2 | 7-1 | 2 | 6-2 | 2 | 5-7 | 2 | |
3-2×12 | 8-5 | 2 | 7-4 | 2 | 6-7 | 2 | 8-2 | 2 | 7-2 | 2 | 6-5 | 3 | |
4-2×8 | 6-10 | 1 | 6-0 | 2 | 5-5 | 2 | 6-8 | 1 | 5-10 | 2 | 5-3 | 2 | |
4-2×10 | 8-4 | 2 | 7-4 | 2 | 6-7 | 2 | 8-2 | 2 | 7-2 | 2 | 6-5 | 2 | |
4-2×12 | 9-8 | 2 | 8-6 | 2 | 7-8 | 2 | 9-5 | 2 | 8-3 | 2 | 7-5 | 2 | |
Roof, Ceiling & 2 Clear Span Floors | 2-2×4 | 2-1 | 1 | 1-8 | 1 | 1-6 | 2 | 2-0 | 1 | 1-8 | 1 | 1-5 | 2 |
2-2×6 | 3-1 | 2 | 2-8 | 2 | 2-4 | 2 | 3-0 | 2 | 2-7 | 2 | 2-3 | 2 | |
2-2×8 | 3-10 | 2 | 3-4 | 2 | 3-0 | 3 | 3-10 | 2 | 3-4 | 2 | 2-11 | 3 | |
2-2×10 | 4-9 | 2 | 4-1 | 3 | 3-8 | 3 | 4-8 | 2 | 4-0 | 3 | 3-7 | 3 | |
2-2×12 | 5-6 | 3 | 4-9 | 3 | 4-3 | 3 | 5-5 | 3 | 4-8 | 3 | 4-2 | 3 | |
3-2×8 | 4-10 | 2 | 4-2 | 2 | 3-9 | 2 | 4-9 | 2 | 4-1 | 2 | 3-8 | 2 | |
3-2×10 | 5-11 | 2 | 5-1 | 2 | 4-7 | 3 | 5-10 | 2 | 5-0 | 2 | 4-6 | 3 | |
3-2×12 | 6-10 | 2 | 5-11 | 3 | 5-4 | 3 | 6-9 | 2 | 5-10 | 3 | 5-3 | 3 | |
4-2×8 | 5-7 | 2 | 4-10 | 2 | 4-4 | 2 | 5-6 | 2 | 4-9 | 2 | 4-3 | 2 | |
4-2×10 | 6-10 | 2 | 5-11 | 2 | 5-3 | 2 | 6-9 | 2 | 5-10 | 2 | 5-2 | 2 | |
4-2×12 | 7-11 | 2 | 6-10 | 2 | 6-2 | 3 | 7-9 | 2 | 6-9 | 2 | 6-0 | 3 |
TABLE 2308.9.6
HEADER AND GIRDER SPANSa FOR INTERIOR BEARING WALLS
(Maximum Spans for Douglas Fir-Larch, Hem-Fir, Southern Pine and Spruce-Pine-Firb and Required Number of Jack Studs)
HEADERS AND GIRDERS SUPPORTING | SIZE | BUILDING widthc (feet) | |||||
20 | 28 | 36 | |||||
Span | NJd | Span | NJd | Span | NJd | ||
One Floor Only | 2-2×4 | 3-1 | 1 | 2-8 | 1 | 2-5 | 1 |
2-2×6 | 4-6 | 1 | 3-11 | 1 | 3-6 | 1 | |
2-2×8 | 5-9 | 1 | 5-0 | 2 | 4-5 | 2 | |
2-2×10 | 7-0 | 2 | 6-1 | 2 | 5-5 | 2 | |
2-2×12 | 8-1 | 2 | 7-0 | 2 | 6-3 | 2 | |
3-2×8 | 7-2 | 1 | 6-3 | 1 | 5-7 | 2 | |
3-2×10 | 8-9 | 1 | 7-7 | 2 | 6-9 | 2 | |
3-2×12 | 10-2 | 2 | 8-10 | 2 | 7-10 | 2 | |
4-2×8 | 9-0 | 1 | 7-8 | 1 | 6-9 | 1 | |
4-2×10 | 10-1 | 1 | 8-9 | 1 | 7-10 | 2 | |
4-2×12 | 11-9 | 1 | 10-2 | 2 | 9-1 | 2 | |
Two Floors | 2-2×4 | 2-2 | 1 | 1-10 | 1 | 1-7 | 1 |
2-2×6 | 3-2 | 2 | 2-9 | 2 | 2-5 | 2 | |
2-2×8 | 4-1 | 2 | 3-6 | 2 | 3-2 | 2 | |
2-2×10 | 4-11 | 2 | 4-3 | 2 | 3-10 | 3 | |
2-2×12 | 5-9 | 2 | 5-0 | 3 | 4-5 | 3 | |
3-2×8 | 5-1 | 2 | 4-5 | 2 | 3-11 | 2 | |
3-2×10 | 6-2 | 2 | 5-4 | 2 | 4-10 | 2 | |
3-2×12 | 7-2 | 2 | 6-3 | 2 | 5-7 | 3 | |
4-2×8 | 6-1 | 1 | 5-3 | 2 | 4-8 | 2 | |
4-2×10 | 7-2 | 2 | 6-2 | 2 | 5-6 | 2 | |
4-2×12 | 8-4 | 2 | 7-2 | 2 | 6-5 | 2 |
REQUIRED RATING OF APPROVED UPLIFT CONNECTORS (pounds)a, b, c, e, f, g, h
NOMINAL DESIGN WIND SPEED,Vasdi | ROOF SPAN (feet) | OVERHANGS (pounds/feet)d | ||||||
12 | 20 | 24 | 28 | 32 | 36 | 40 | ||
85 | -72 | -120 | -145 | -169 | -193 | -217 | -241 | -38.55 |
90 | -91 | -151 | -181 | -212 | -242 | -272 | -302 | -43.22 |
100 | -131 | -281 | -262 | -305 | -349 | -393 | -436 | -53.36 |
110 | -175 | -292 | -351 | -409 | -467 | -526 | -584 | -64.56 |
- The uplift connection requirements are based on a 30-foot mean roof height located in Exposure B. For Exposure C or D and for other mean roof heights, multiply the above loads by the adjustment coefficients below.
Mean Roof Height (feet) EXPOSURE 15 20 25 30 35 40 45 50 55 60 B 1.00 1.00 1.00 1.00 1.05 1.09 1.12 1.16 1.19 1.22 C 1.21 1.29 1.35 1.40 1.45 1.49 1.53 1.56 1.59 1.62 D 1.47 1.55 1.61 1.66 1.70 1.74 1.78 1.81 1.84 1.87 - The uplift connection requirements are based on the framing being spaced 24 inches on center. Multiply by 0.67 for framing spaced 16 inches on center and multiply by 0.5 for framing spaced 12 inches on center.
- The uplift connection requirements include an allowance for 10 pounds of dead load.
- The uplift connection requirements do not account for the effects of overhangs. The magnitude of the above loads shall be increased by adding the overhang loads found in the table. The overhang loads are also based on framing spaced 24 inches on center. The overhang loads given shall be multiplied by the overhang projection and added to the roof uplift value in the table.
- The uplift connection requirements are based upon wind loading on end zones as defined in Figure 28.6.3 of ASCE 7. Connection loads for connections located a distance of 20 percent of the least horizontal dimension of the building from the corner of the building are permitted to be reduced by multiplying the table connection value by 0.7 and multiplying the overhang load by 0.8.
- For wall-to-wall and wall-to-foundation connections, the capacity of the uplift connector is permitted to be reduced by 100 pounds for each full wall above. (For example, if a 500-pound rated connector is used on the roof framing, a 400-pound rated connector is permitted at the next floor level down).
- Interpolation is permitted for intermediate values of Vasd and roof spans.
- The rated capacity of approved tie-down devices is permitted to include up to a 60-percent increase for wind effects where allowed by material specifications.
- Vasd shall be determined in accordance with Section 1609.3.1.
TABLE 2308.10.2(1)
CEILING JOIST SPANS FOR COMMON LUMBER SPECIES
(Uninhabitable Attics Without Storage, Live Load = 10 pounds psf, L/Δ = 240)
CEILING JOIST SPACING (inches) | SPECIES AND GRADE | DEAD LOAD = 5 pounds per square foot | |||||
2 × 4 | 2 × 6 | 2 × 8 | 2 × 10 | ||||
Maximum ceiling joist spans | |||||||
(ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | ||||
12 | Douglas Fir-Larch | SS | 13-2 | 20-8 | 26-0 | 26-0 | |
Douglas Fir-Larch | #1 | 12-8 | 19-11 | 26-0 | 26-0 | ||
Douglas Fir-Larch | #2 | 12-5 | 19-6 | 25-8 | 26-0 | ||
Douglas Fir-Larch | #3 | 10-10 | 15-10 | 20-1 | 24-6 | ||
Hem-Fir | SS | 12-5 | 19-6 | 25-8 | 26-0 | ||
Hem-Fir | #1 | 12-2 | 19-1 | 25-2 | 26-0 | ||
Hem-Fir | #2 | 11-7 | 18-2 | 24-0 | 26-0 | ||
Hem-Fir | #3 | 10-10 | 15-10 | 20-1 | 24-6 | ||
Southern Pine | SS | 12-11 | 20-3 | 26-0 | 26-0 | ||
Southern Pine | #1 | 12-8 | 19-11 | 26-0 | 26-0 | ||
Southern Pine | #2 | 12-5 | 19-6 | 25-8 | 26-0 | ||
Southern Pine | #3 | 11-6 | 17-0 | 21-8 | 25-7 | ||
Spruce-Pine-Fir | SS | 12-2 | 19-1 | 25-2 | 26-0 | ||
Spruce-Pine-Fir | #1 | 11-10 | 18-8 | 24-7 | 26-0 | ||
Spruce-Pine-Fir | #2 | 11-10 | 18-8 | 24-7 | 26-0 | ||
Spruce-Pine-Fir | #3 | 10-10 | 15-10 | 20-1 | 24-6 | ||
16 | Douglas Fir-Larch | SS | 11-11 | 18-9 | 24-8 | 26-0 | |
Douglas Fir-Larch | #1 | 11-6 | 18-1 | 23-10 | 26-0 | ||
Douglas Fir-Larch | #2 | 11-3 | 17-8 | 23-0 | 26-0 | ||
Douglas Fir-Larch | #3 | 9-5 | 13-9 | 17-5 | 21-3 | ||
Hem-Fir | SS | 11-3 | 17-8 | 23-4 | 26-0 | ||
Hem-Fir | #1 | 11-0 | 17-4 | 22-10 | 26-0 | ||
Hem-Fir | #2 | 10-6 | 16-6 | 21-9 | 26-0 | ||
Hem-Fir | #3 | 9-5 | 13-9 | 17-5 | 21-3 | ||
Southern Pine | SS | 11-9 | 18-5 | 24-3 | 26-0 | ||
Southern Pine | #1 | 11-6 | 18-1 | 23-1 | 26-0 | ||
Southern Pine | #2 | 11-3 | 17-8 | 23-4 | 26-0 | ||
Southern Pine | #3 | 10-0 | 14-9 | 18-9 | 22-2 | ||
Spruce-Pine-Fir | SS | 11-0 | 17-4 | 22-10 | 26-0 | ||
Spruce-Pine-Fir | #1 | 10-9 | 16-11 | 22-4 | 26-0 | ||
Spruce-Pine-Fir | #2 | 10-9 | 16-11 | 22-4 | 26-0 | ||
Spruce-Pine-Fir | #3 | 9-5 | 13-9 | 17-5 | 21-3 |
(continued)
TABLE 2308.10.2(1)—continued
CEILING JOIST SPANS FOR COMMON LUMBER SPECIES
(Uninhabitable Attics Without Storage, Live Load = 10 pounds psf, L/Δ = 240)
CEILING JOIST SPACING (inches) | SPECIES AND GRADE | DEAD LOAD = 5 pounds per square foot | ||||
2 × 4 | 2 × 6 | 2 × 8 | 2 × 10 | |||
Maximum ceiling joist spans | ||||||
(ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | |||
19.2 | Douglas Fir-Larch | SS | 11-3 | 17-8 | 23-3 | 26-0 |
Douglas Fir-Larch | #1 | 10-10 | 17-0 | 22-5 | 26-0 | |
Douglas Fir-Larch | #2 | 10-7 | 16-7 | 21-0 | 25-8 | |
Douglas Fir-Larch | #3 | 8-7 | 12-6 | 15-10 | 19-5 | |
Hem-Fir | SS | 10-7 | 16-8 | 21-11 | 26-0 | |
Hem-Fir | #1 | 10-4 | 16-4 | 21-6 | 26-0 | |
Hem-Fir | #2 | 9-11 | 15-7 | 20-6 | 25-3 | |
Hem-Fir | #3 | 8-7 | 12-6 | 15-10 | 19-5 | |
Southern Pine | SS | 11-0 | 17-4 | 22-10 | 26-0 | |
Southern Pine | #1 | 10-10 | 17-0 | 22-5 | 26-0 | |
Southern Pine | #2 | 10-7 | 16-8 | 21-11 | 26-0 | |
Southern Pine | #3 | 9-1 | 13-6 | 17-2 | 20-3 | |
Spruce-Pine-Fir | SS | 10-4 | 16-4 | 21-6 | 26-0 | |
Spruce-Pine-Fir | #1 | 10-2 | 15-11 | 21-0 | 25-8 | |
Spruce-Pine-Fir | #2 | 10-2 | 15-11 | 21-0 | 25-8 | |
Spruce-Pine-Fir | #3 | 8-7 | 12-6 | 15-10 | 19-5 | |
24 | Douglas Fir-Larch | SS | 10-5 | 16-4 | 21-7 | 26-0 |
Douglas Fir-Larch | #1 | 10-0 | 15-9 | 20-1 | 24-6 | |
Douglas Fir-Larch | #2 | 9-10 | 14-10 | 18-9 | 22-11 | |
Douglas Fir-Larch | #3 | 7-8 | 11-2 | 14-2 | 17-4 | |
Hem-Fir | SS | 9-10 | 15-6 | 20-5 | 26-0 | |
Hem-Fir | #1 | 9-8 | 15-2 | 19-7 | 23-11 | |
Hem-Fir | #2 | 9-2 | 14-5 | 18-6 | 22-7 | |
Hem-Fir | #3 | 7-8 | 11-2 | 14-2 | 17-4 | |
Southern Pine | SS | 10-3 | 16-1 | 21-2 | 26-0 | |
Southern Pine | #1 | 10-0 | 15-9 | 20-10 | 26-0 | |
Southern Pine | #2 | 9-10 | 15-6 | 20-1 | 23-11 | |
Southern Pine | #3 | 8-2 | 12-0 | 15-4 | 18-1 | |
Spruce-Pine-Fir | SS | 9-8 | 15-2 | 19-11 | 25-5 | |
Spruce-Pine-Fir | #1 | 9-5 | 14-9 | 18-9 | 22-11 | |
Spruce-Pine-Fir | #2 | 9-5 | 14-9 | 18-9 | 22-11 | |
Spruce-Pine-Fir | #3 | 7-8 | 11-2 | 14-2 | 17-4 |
Deleted
TABLE 2308.10.2(2)
CEILING JOIST SPANS FOR COMMON LUMBER SPECIES
(Uninhabitable Attics With Limited Storage, Live Load = 20 pounds per square foot, L/Δ = 240)
CEILING JOIST SPACING (inches) | SPECIES AND GRADE | DEAD LOAD = 10 pounds per square foot | ||||
2 × 4 | 2 × 6 | 2 × 8 | 2 × 10 | |||
Maximum ceiling joist spans | ||||||
(ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | |||
12 | Douglas Fir-Larch | SS | 10-5 | 16-4 | 21-7 | 26-0 |
Douglas Fir-Larch | #1 | 10-0 | 15-9 | 20-1 | 24-6 | |
Douglas Fir-Larch | #2 | 9-10 | 14-10 | 18-9 | 22-11 | |
Douglas Fir-Larch | #3 | 7-8 | 11-2 | 14-2 | 17-4 | |
Hem-Fir | SS | 9-10 | 15-6 | 20-5 | 26-0 | |
Hem-Fir | #1 | 9-8 | 15-2 | 19-7 | 23-11 | |
Hem-Fir | #2 | 9-2 | 14-5 | 18-6 | 22-7 | |
Hem-Fir | #3 | 7-8 | 11-2 | 14-2 | 17-4 | |
Southern Pine | SS | 10-3 | 16-1 | 21-2 | 26-0 | |
Southern Pine | #1 | 10-0 | 15-9 | 20-10 | 26-0 | |
Southern Pine | #2 | 9-10 | 15-6 | 20-1 | 23-11 | |
Southern Pine | #3 | 8-2 | 12-0 | 15-4 | 18-1 | |
Spruce-Pine-Fir | SS | 9-8 | 15-2 | 19-11 | 25-5 | |
Spruce-Pine-Fir | #1 | 9-5 | 14-9 | 18-9 | 22-11 | |
Spruce-Pine-Fir | #2 | 9-5 | 14-9 | 18-9 | 22-11 | |
Spruce-Pine-Fir | #3 | 7-8 | 11-2 | 14-2 | 17-4 | |
16 | Douglas Fir-Larch | SS | 9-6 | 14-11 | 19-7 | 25-0 |
Douglas Fir-Larch | #1 | 9-1 | 13-9 | 17-5 | 21-3 | |
Douglas Fir-Larch | #2 | 8-9 | 12-10 | 16-3 | 19-10 | |
Douglas Fir-Larch | #3 | 6-8 | 9-8 | 12-4 | 15-0 | |
Hem-Fir | SS | 8-11 | 14-1 | 18-6 | 23-8 | |
Hem-Fir | #1 | 8-9 | 13-5 | 16-10 | 20-8 | |
Hem-Fir | #2 | 8-4 | 12-8 | 16-0 | 19-7 | |
Hem-Fir | #3 | 6-8 | 9-8 | 12-4 | 15-0 | |
Southern Pine | SS | 9-4 | 14-7 | 19-3 | 24-7 | |
Southern Pine | #1 | 9-1 | 14-4 | 18-11 | 23-1 | |
Southern Pine | #2 | 8-11 | 13-6 | 17-5 | 20-9 | |
Southern Pine | #3 | 7-1 | 10-5 | 13-3 | 15-8 | |
Spruce-Pine-Fir | SS | 8-9 | 13-9 | 18-1 | 23-1 | |
Spruce-Pine-Fir | #1 | 8-7 | 12-10 | 16-3 | 19-10 | |
Spruce-Pine-Fir | #2 | 8-7 | 12-10 | 16-3 | 19-10 | |
Spruce-Pine-Fir | #3 | 6-8 | 9-8 | 12-4 | 15-0 |
(continued)
TABLE 2308.10.2(2)—continued
CEILING JOIST SPANS FOR COMMON LUMBER SPECIES
(Uninhabitable Attics With Limited Storage, Live Load = 20 pounds per square foot, L/Δ = 240)
CEILING JOIST SPACING (inches) | SPECIES AND GRADE | DEAD LOAD = 10 pounds per square foot | ||||
2 × 4 | 2 × 6 | 2 × 8 | 2 × 10 | |||
Maximum ceiling joist spans | ||||||
(ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | |||
19.2 | Douglas Fir-Larch | SS | 8-11 | 14-0 | 18-5 | 23-4 |
Douglas Fir-Larch | #1 | 8-7 | 12-6 | 15-10 | 19-5 | |
Douglas Fir-Larch | #2 | 8-0 | 11-9 | 14-10 | 18-2 | |
Douglas Fir-Larch | #3 | 6-1 | 8-10 | 11-3 | 13-8 | |
Hem-Fir | SS | 8-5 | 13-3 | 17-5 | 22-3 | |
Hem-Fir | #1 | 8-3 | 12-3 | 15-6 | 18-11 | |
Hem-Fir | #2 | 7-10 | 11-7 | 14-8 | 17-10 | |
Hem-Fir | #3 | 6-1 | 8-10 | 11-3 | 13-8 | |
Southern Pine | SS | 8-9 | 13-9 | 18-1 | 23-1 | |
Southern Pine | #1 | 8-7 | 13-6 | 17-9 | 21-1 | |
Southern Pine | #2 | 8-5 | 12-3 | 15-10 | 18-11 | |
Southern Pine | #3 | 6-5 | 9-6 | 12-1 | 14-4 | |
Spruce-Pine-Fir | SS | 8-3 | 12-11 | 17-1 | 21-8 | |
Spruce-Pine-Fir | #1 | 8-0 | 11-9 | 14-10 | 18-2 | |
Spruce-Pine-Fir | #2 | 8-0 | 11-9 | 14-10 | 18-2 | |
Spruce-Pine-Fir | #3 | 6-1 | 8-10 | 11-3 | 13-8 | |
24 | Douglas Fir-Larch | SS | 8-3 | 13-0 | 17-1 | 20-11 |
Douglas Fir-Larch | #1 | 7-8 | 11-2 | 14-2 | 17-4 | |
Douglas Fir-Larch | #2 | 7-2 | 10-6 | 13-3 | 16-3 | |
Douglas Fir-Larch | #3 | 5-5 | 7-11 | 10-0 | 12-3 | |
Hem-Fir | SS | 7-10 | 12-3 | 16-2 | 20-6 | |
Hem-Fir | #1 | 7-6 | 10-11 | 13-10 | 16-11 | |
Hem-Fir | #2 | 7-1 | 10-4 | 13-1 | 16-0 | |
Hem-Fir | #3 | 5-5 | 7-11 | 10-0 | 12-3 | |
Southern Pine | SS | 8-1 | 12-9 | 16-10 | 21-6 | |
Southern Pine | #1 | 8-0 | 12-6 | 15-10 | 18-10 | |
Southern Pine | #2 | 7-8 | 11-0 | 14-2 | 16-11 | |
Southern Pine | #3 | 5-9 | 8-6 | 10-10 | 12-10 | |
Spruce-Pine-Fir | SS | 7-8 | 12-0 | 15-10 | 19-5 | |
Spruce-Pine-Fir | #1 | 7-2 | 10-6 | 13-3 | 16-3 | |
Spruce-Pine-Fir | #2 | 7-2 | 10-6 | 13-3 | 16-3 | |
Spruce-Pine-Fir | #3 | 5-5 | 7-11 | 10-0 | 12-3 |
Deleted
TABLE 2308.10.3(1)
RAFTER SPANS FOR COMMON LUMBER SPECIES
(Roof Live Load = 20 pounds per square foot, Ceiling Not Attached to Rafters, L/Δ= 180)
RAFTER SPACING (inches) | SPECIES AND GRADE | DEAD LOAD = 10 pounds per square foot | DEAD LOAD = 20 pounds per square foot | |||||||||
2 × 4 | 2 × 6 | 2 × 8 | 2 × 10 | 2 × 12 | 2 × 4 | 2 × 6 | 2 × 8 | 2 × 10 | 2 × 12 | |||
Maximum rafter spans | ||||||||||||
(ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | |||
12 | Douglas Fir-Larch | SS | 11-6 | 18-0 | 23-9 | 26-0 | 26-0 | 11-6 | 18-0 | 23-5 | 26-0 | 26-0 |
Douglas Fir-Larch | #1 | 11-1 | 17-4 | 22-5 | 26-0 | 26-0 | 10-6 | 15-4 | 19-5 | 23-9 | 26-0 | |
Douglas Fir-Larch | #2 | 10-10 | 16-7 | 21-0 | 25-8 | 26-0 | 9-10 | 14-4 | 18-2 | 22-3 | 25-9 | |
Douglas Fir-Larch | #3 | 8-7 | 12-6 | 15-10 | 19-5 | 22-6 | 7-5 | 10-10 | 13-9 | 16-9 | 19-6 | |
Hem-Fir | SS | 10-10 | 17-0 | 22-5 | 26-0 | 26-0 | 10-10 | 17-0 | 22-5 | 26-0 | 26-0 | |
Hem-Fir | #1 | 10-7 | 16-8 | 21-10 | 26-0 | 26-0 | 10-3 | 14-11 | 18-11 | 23-2 | 26-0 | |
Hem-Fir | #2 | 10-1 | 15-11 | 20-8 | 25-3 | 26-0 | 9-8 | 14-2 | 17-11 | 21-11 | 25-5 | |
Hem-Fir | #3 | 8-7 | 12-6 | 15-10 | 19-5 | 22-6 | 7-5 | 10-10 | 13-9 | 16-9 | 19-6 | |
Southern Pine | SS | 11-3 | 17-8 | 23-4 | 26-0 | 26-0 | 11-3 | 17-8 | 23-4 | 26-0 | 26-0 | |
Southern Pine | #1 | 11-1 | 17-4 | 22-11 | 26-0 | 26-0 | 11-1 | 17-3 | 21-9 | 25-10 | 26-0 | |
Southern Pine | #2 | 10-10 | 17-0 | 22-5 | 26-0 | 26-0 | 10-6 | 15-1 | 19-5 | 23-2 | 26-0 | |
Southern Pine | #3 | 9-1 | 13-6 | 17-2 | 20-3 | 24-1 | 7-11 | 11-8 | 14-10 | 17-6 | 20-11 | |
Spruce-Pine-Fir | SS | 10-7 | 16-8 | 21-11 | 26-0 | 26-0 | 10-7 | 16-8 | 21-9 | 26-0 | 26-0 | |
Spruce-Pine-Fir | #1 | 10-4 | 16-3 | 21-0 | 25-8 | 26-0 | 9-10 | 14-4 | 18-2 | 22-3 | 25-9 | |
Spruce-Pine-Fir | #2 | 10-4 | 16-3 | 21-0 | 25-8 | 26-0 | 9-10 | 14-4 | 18-2 | 22-3 | 25-9 | |
Spruce-Pine-Fir | #3 | 8-7 | 12-6 | 15-10 | 19-5 | 22-6 | 7-5 | 10-10 | 13-9 | 16-9 | 19-6 | |
16 | Douglas Fir-Larch | SS | 10-5 | 16-4 | 21-7 | 26-0 | 26-0 | 10-5 | 16-0 | 20-3 | 24-9 | 26-0 |
Douglas Fir-Larch | #1 | 10-0 | 15-4 | 19-5 | 23-9 | 26-0 | 9-1 | 13-3 | 16-10 | 20-7 | 23-10 | |
Douglas Fir-Larch | #2 | 9-10 | 14-4 | 18-2 | 22-3 | 25-9 | 8-6 | 12-5 | 15-9 | 19-3 | 22-4 | |
Douglas Fir-Larch | #3 | 7-5 | 10-10 | 13-9 | 16-9 | 19-6 | 6-5 | 9-5 | 11-11 | 14-6 | 16-10 | |
Hem-Fir | SS | 9-10 | 15-6 | 20-5 | 26-0 | 26-0 | 9-10 | 15-6 | 19-11 | 24-4 | 26-0 | |
Hem-Fir | #1 | 9-8 | 14-11 | 18-11 | 23-2 | 26-0 | 8-10 | 12-11 | 16-5 | 20-0 | 23-3 | |
Hem-Fir | #2 | 9-2 | 14-2 | 17-11 | 21-11 | 25-5 | 8-5 | 12-3 | 15-6 | 18-11 | 22-0 | |
Hem-Fir | #3 | 7-5 | 10-10 | 13-9 | 16-9 | 19-6 | 6-5 | 9-5 | 11-11 | 14-6 | 16-10 | |
Southern Pine | SS | 10-3 | 16-1 | 21-2 | 26-0 | 26-0 | 10-3 | 16-1 | 21-2 | 26-0 | 26-0 | |
Southern Pine | #1 | 10-0 | 15-9 | 20-10 | 25-10 | 26-0 | 10-0 | 15-0 | 18-10 | 22-4 | 26-0 | |
Southern Pine | #2 | 9-10 | 15-1 | 19-5 | 23-2 | 26-0 | 9-1 | 13-0 | 16-10 | 20-1 | 23-7 | |
Southern Pine | #3 | 7-11 | 11-8 | 14-10 | 17-6 | 20-11 | 6-10 | 10-1 | 12-10 | 15-2 | 18-1 | |
Spruce-Pine-Fir | SS | 9-8 | 15-2 | 19-11 | 25-5 | 26-0 | 9-8 | 14-10 | 18-10 | 23-0 | 26-0 | |
Spruce-Pine-Fir | #1 | 9-5 | 14-4 | 18-2 | 22-3 | 25-9 | 8-6 | 12-5 | 15-9 | 19-3 | 22-4 | |
Spruce-Pine-Fir | #2 | 9-5 | 14-4 | 18-2 | 22-3 | 25-9 | 8-6 | 12-5 | 15-9 | 19-3 | 22-4 | |
Spruce-Pine-Fir | #3 | 7-5 | 10-10 | 13-9 | 16-9 | 19-6 | 6-5 | 9-5 | 11-11 | 14-6 | 16-10 |
(continued)
TABLE 2308.10.3(1)—continued
RAFTER SPANS FOR COMMON LUMBER SPECIES
(Roof Live Load = 20 pounds per square foot, Ceiling Not Attached to Rafters, L/Δ = 180)
RAFTER SPACING (inches) | SPECIES AND GRADE | DEAD LOAD = 10 pounds per square foot | DEAD LOAD = 20 pounds per square foot | |||||||||
2 × 4 | 2 × 6 | 2 × 8 | 2 × 10 | 2 × 12 | 2 × 4 | 2 × 6 | 2 × 8 | 2 × 10 | 2 × 12 | |||
Maximum rafter spans | ||||||||||||
(ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | |||
19.2 | Douglas Fir-Larch | SS | 9-10 | 15-5 | 20-4 | 25-11 | 26-0 | 9-10 | 14-7 | 18-6 | 22-7 | 26-0 |
Douglas Fir-Larch | #1 | 9-5 | 14-0 | 17-9 | 21-8 | 25-2 | 8-4 | 12-2 | 15-4 | 18-9 | 21-9 | |
Douglas Fir-Larch | #2 | 8-11 | 13-1 | 16-7 | 20-3 | 23-6 | 7-9 | 11-4 | 14-4 | 17-7 | 20-4 | |
Douglas Fir-Larch | #3 | 6-9 | 9-11 | 12-7 | 15-4 | 17-9 | 5-10 | 8-7 | 10-10 | 13-3 | 15-5 | |
Hem-Fir | SS | 9-3 | 14-7 | 19-2 | 24-6 | 26-0 | 9-3 | 14-4 | 18-2 | 22-3 | 25-9 | |
Hem-Fir | #1 | 9-1 | 13-8 | 17-4 | 21-1 | 24-6 | 8-1 | 11-10 | 15-0 | 18-4 | 21-3 | |
Hem-Fir | #2 | 8-8 | 12-11 | 16-4 | 20-0 | 23-2 | 7-8 | 11-2 | 14-2 | 17-4 | 20-1 | |
Hem-Fir | #3 | 6-9 | 9-11 | 12-7 | 15-4 | 17-9 | 5-10 | 8-7 | 10-10 | 13-3 | 15-5 | |
Southern Pine | SS | 9-8 | 15-2 | 19-11 | 25-5 | 26-0 | 9-8 | 15-2 | 19-11 | 25-5 | 26-0 | |
Southern Pine | #1 | 9-5 | 14-10 | 19-7 | 23-7 | 26-0 | 9-3 | 13-8 | 17-2 | 20-5 | 24-4 | |
Southern Pine | #2 | 9-3 | 13-9 | 17-9 | 21-2 | 24-10 | 8-4 | 11-11 | 15-4 | 18-4 | 21-6 | |
Southern Pine | #3 | 7-3 | 10-8 | 13-7 | 16-0 | 19-1 | 6-3 | 9-3 | 11-9 | 13-10 | 16-6 | |
Spruce-Pine-Fir | SS | 9-1 | 14-3 | 18-9 | 23-11 | 26-0 | 9-1 | 13-7 | 17-2 | 21-0 | 24-4 | |
Spruce-Pine-Fir | #1 | 8-10 | 13-1 | 16-7 | 20-3 | 23-6 | 7-9 | 11-4 | 14-4 | 17-7 | 20-4 | |
Spruce-Pine-Fir | #2 | 8-10 | 13-1 | 16-7 | 20-3 | 23-6 | 7-9 | 11-4 | 14-4 | 17-7 | 20-4 | |
Spruce-Pine-Fir | #3 | 6-9 | 9-11 | 12-7 | 15-4 | 17-9 | 5-10 | 8-7 | 10-10 | 13-3 | 15-5 | |
24 | Douglas Fir-Larch | SS | 9-1 | 14-4 | 18-10 | 23-4 | 26-0 | 8-11 | 13-1 | 16-7 | 20-3 | 23-5 |
Douglas Fir-Larch | #1 | 8-7 | 12-6 | 15-10 | 19-5 | 22-6 | 7-5 | 10-10 | 13-9 | 16-9 | 19-6 | |
Douglas Fir-Larch | #2 | 8-0 | 11-9 | 14-10 | 18-2 | 21-0 | 6-11 | 10-2 | 12-10 | 15-8 | 18-3 | |
Douglas Fir-Larch | #3 | 6-1 | 8-10 | 11-3 | 13-8 | 15-11 | 5-3 | 7-8 | 9-9 | 11-10 | 13-9 | |
Hem-Fir | SS | 8-7 | 13-6 | 17-10 | 22-9 | 26-0 | 8-7 | 12-10 | 16-3 | 19-10 | 23-0 | |
Hem-Fir | #1 | 8-4 | 12-3 | 15-6 | 18-11 | 21-11 | 7-3 | 10-7 | 13-5 | 16-4 | 19-0 | |
Hem-Fir | #2 | 7-11 | 11-7 | 14-8 | 17-10 | 20-9 | 6-10 | 10-0 | 12-8 | 15-6 | 17-11 | |
Hem-Fir | #3 | 6-1 | 8-10 | 11-3 | 13-8 | 15-11 | 5-3 | 7-8 | 9-9 | 11-10 | 13-9 | |
Southern Pine | SS | 8-11 | 14-1 | 18-6 | 23-8 | 26-0 | 8-11 | 14-1 | 18-6 | 22-11 | 26-0 | |
Southern Pine | #1 | 8-9 | 13-9 | 17-9 | 21-1 | 25-2 | 8-3 | 12-3 | 15-4 | 18-3 | 21-9 | |
Southern Pine | #2 | 8-7 | 12-3 | 15-10 | 18-11 | 22-2 | 7-5 | 10-8 | 13-9 | 16-5 | 19-3 | |
Southern Pine | #3 | 6-5 | 9-6 | 12-1 | 14-4 | 17-1 | 5-7 | 8-3 | 10-6 | 12-5 | 14-9 | |
Spruce-Pine-Fir | SS | 8-5 | 13-3 | 17-5 | 21-8 | 25-2 | 8-4 | 12-2 | 15-4 | 18-9 | 21-9 | |
Spruce-Pine-Fir | #1 | 8-0 | 11-9 | 14-10 | 18-2 | 21-0 | 6-11 | 10-2 | 12-10 | 15-8 | 18-3 | |
Spruce-Pine-Fir | #2 | 8-0 | 11-9 | 14-10 | 18-2 | 21-0 | 6-11 | 10-2 | 12-10 | 15-8 | 18-3 | |
Spruce-Pine-Fir | #3 | 6-1 | 8-10 | 11-3 | 13-8 | 15-11 | 5-3 | 7-8 | 9-9 | 11-10 | 13-9 |
Deleted
TABLE 2308.10.3(2)
RAFTER SPANS FOR COMMON LUMBER SPECIES
(Roof Live Load = 20 pounds per square foot, Ceiling Attached to Rafters, L/Δ = 240)
RAFTER SPACING (inches) | SPECIES AND GRADE | DEAD LOAD = 10 pounds per square foot | DEAD LOAD = 20 pounds per square foot | |||||||||
2 × 4 | 2 × 6 | 2 × 8 | 2 × 10 | 2 × 12 | 2 × 4 | 2 × 6 | 2 × 8 | 2 × 10 | 2 × 12 | |||
Maximum rafter spans | ||||||||||||
(ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | |||
12 | Douglas Fir-Larch | SS | 10-5 | 16-4 | 21-7 | 26-0 | 26-0 | 10-5 | 16-4 | 21-7 | 26-0 | 26-0 |
Douglas Fir-Larch | #1 | 10-0 | 15-9 | 20-10 | 26-0 | 26-0 | 10-0 | 15-4 | 19-5 | 23-9 | 26-0 | |
Douglas Fir-Larch | #2 | 9-10 | 15-6 | 20-5 | 25-8 | 26-0 | 9-10 | 14-4 | 18-2 | 22-3 | 25-9 | |
Douglas Fir-Larch | #3 | 8-7 | 12-6 | 15-10 | 19-5 | 22-6 | 7-5 | 10-10 | 13-9 | 16-9 | 19-6 | |
Hem-Fir | SS | 9-10 | 15-6 | 20-5 | 26-0 | 26-0 | 9-10 | 15-6 | 20-5 | 26-0 | 26-0 | |
Hem-Fir | #1 | 9-8 | 15-2 | 19-11 | 25-5 | 26-0 | 9-8 | 14-11 | 18-11 | 23-2 | 26-0 | |
Hem-Fir | #2 | 9-2 | 14-5 | 19-0 | 24-3 | 26-0 | 9-2 | 14-2 | 17-11 | 21-11 | 25-5 | |
Hem-Fir | #3 | 8-7 | 12-6 | 15-10 | 19-5 | 22-6 | 7-5 | 10-10 | 13-9 | 16-9 | 19-6 | |
Southern Pine | SS | 10-3 | 16-1 | 21-2 | 26-0 | 26-0 | 10-3 | 16-1 | 21-2 | 26-0 | 26-0 | |
Southern Pine | #1 | 10-0 | 15-9 | 20-10 | 26-0 | 26-0 | 10-0 | 15-9 | 20-10 | 25-10 | 26-0 | |
Southern Pine | #2 | 9-10 | 15-6 | 20-5 | 26-0 | 26-0 | 9-10 | 15-1 | 19-5 | 23-2 | 26-0 | |
Southern Pine | #3 | 9-1 | 13-6 | 17-2 | 20-3 | 24-1 | 7-11 | 11-8 | 14-10 | 17-6 | 20-11 | |
Spruce-Pine-Fir | SS | 9-8 | 15-2 | 19-11 | 25-5 | 26-0 | 9-8 | 15-2 | 19-11 | 25-5 | 26-0 | |
Spruce-Pine-Fir | #1 | 9-5 | 14-9 | 19-6 | 24-10 | 26-0 | 9-5 | 14-4 | 18-2 | 22-3 | 25-9 | |
Spruce-Pine-Fir | #2 | 9-5 | 14-9 | 19-6 | 24-10 | 26-0 | 9-5 | 14-4 | 18-2 | 22-3 | 25-9 | |
Spruce-Pine-Fir | #3 | 8-7 | 12-6 | 15-10 | 19-5 | 22-6 | 7-5 | 10-10 | 13-9 | 16-9 | 19-6 | |
16 | Douglas Fir-Larch | SS | 9-6 | 14-11 | 19-7 | 25-0 | 26-0 | 9-6 | 14-11 | 19-7 | 24-9 | 26-0 |
Douglas Fir-Larch | #1 | 9-1 | 14-4 | 18-11 | 23-9 | 26-0 | 9-1 | 13-3 | 16-10 | 20-7 | 23-10 | |
Douglas Fir-Larch | #2 | 8-11 | 14-1 | 18-2 | 22-3 | 25-9 | 8-6 | 12-5 | 15-9 | 19-3 | 22-4 | |
Douglas Fir-Larch | #3 | 7-5 | 10-10 | 13-9 | 16-9 | 19-6 | 6-5 | 9-5 | 11-11 | 14-6 | 16-10 | |
Hem-Fir | SS | 8-11 | 14-1 | 18-6 | 23-8 | 26-0 | 8-11 | 14-1 | 18-6 | 23-8 | 26-0 | |
Hem-Fir | #1 | 8-9 | 13-9 | 18-1 | 23-1 | 26-0 | 8-9 | 12-11 | 16-5 | 20-0 | 23-3 | |
Hem-Fir | #2 | 8-4 | 13-1 | 17-3 | 21-11 | 25-5 | 8-4 | 12-3 | 15-6 | 18-11 | 22-0 | |
Hem-Fir | #3 | 7-5 | 10-10 | 13-9 | 16-9 | 19-6 | 6-5 | 9-5 | 11-11 | 14-6 | 16-10 | |
Southern Pine | SS | 9-4 | 14-7 | 19-3 | 24-7 | 26-0 | 9-4 | 14-7 | 19-3 | 24-7 | 26-0 | |
Southern Pine | #1 | 9-1 | 14-4 | 18-11 | 24-1 | 26-0 | 9-1 | 14-4 | 18-10 | 22-4 | 26-0 | |
Southern Pine | #2 | 8-11 | 14-1 | 18-6 | 23-2 | 26-0 | 8-11 | 13-0 | 16-10 | 20-1 | 23-7 | |
Southern Pine | #3 | 7-11 | 11-8 | 14-10 | 17-6 | 20-11 | 6-10 | 10-1 | 12-10 | 15-2 | 18-1 | |
Spruce-Pine-Fir | SS | 8-9 | 13-9 | 18-1 | 23-1 | 26-0 | 8-9 | 13-9 | 18-1 | 23-0 | 26-0 | |
Spruce-Pine-Fir | #1 | 8-7 | 13-5 | 17-9 | 22-3 | 25-9 | 8-6 | 12-5 | 15-9 | 19-3 | 22-4 | |
Spruce-Pine-Fir | #2 | 8-7 | 13-5 | 17-9 | 22-3 | 25-9 | 8-6 | 12-5 | 15-9 | 19-3 | 22-4 | |
Spruce-Pine-Fir | #3 | 7-5 | 10-10 | 13-9 | 16-9 | 19-6 | 6-5 | 9-5 | 11-11 | 14-6 | 16-10 |
(continued)
TABLE 2308.10.3(2)—continued
RAFTER SPANS FOR COMMON LUMBER SPECIES
(Roof Live Load = 20 pounds per square foot, Ceiling Attached to Rafters, L/Δ = 240)
RAFTER SPACING (inches) | SPECIES AND GRADE | DEAD LOAD = 10 pounds per square foot | DEAD LOAD = 20 pounds per square foot | |||||||||
2 × 4 | 2 × 6 | 2 × 8 | 2 × 10 | 2 × 12 | 2 × 4 | 2 × 6 | 2 × 8 | 2 × 10 | 2 × 12 | |||
Maximum rafter spans | ||||||||||||
(ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | |||
19.2 | Douglas Fir-Larch | SS | 8-11 | 14-0 | 18-5 | 23-7 | 26-0 | 8-11 | 14-0 | 18-5 | 22-7 | 26-0 |
Douglas Fir-Larch | #1 | 8-7 | 13-6 | 17-9 | 21-8 | 25-2 | 8-4 | 12-2 | 15-4 | 18-9 | 21-9 | |
Douglas Fir-Larch | #2 | 8-5 | 13-1 | 16-7 | 20-3 | 23-6 | 7-9 | 11-4 | 14-4 | 17-7 | 20-4 | |
Douglas Fir-Larch | #3 | 6-9 | 9-11 | 12-7 | 15-4 | 17-9 | 5-10 | 8-7 | 10-10 | 13-3 | 15-5 | |
Hem-Fir | SS | 8-5 | 13-3 | 17-5 | 22-3 | 26-0 | 8-5 | 13-3 | 17-5 | 22-3 | 25-9 | |
Hem-Fir | #1 | 8-3 | 12-11 | 17-1 | 21-1 | 24-6 | 8-1 | 11-10 | 15-0 | 18-4 | 21-3 | |
Hem-Fir | #2 | 7-10 | 12-4 | 16-3 | 20-0 | 23-2 | 7-8 | 11-2 | 14-2 | 17-4 | 20-1 | |
Hem-Fir | #3 | 6-9 | 9-11 | 12-7 | 15-4 | 17-9 | 5-10 | 8-7 | 10-10 | 13-3 | 15-5 | |
Southern Pine | SS | 8-9 | 13-9 | 18-1 | 23-1 | 26-0 | 8-9 | 13-9 | 18-1 | 23-1 | 26-0 | |
Southern Pine | #1 | 8-7 | 13-6 | 17-9 | 22-8 | 26-0 | 8-7 | 13-6 | 17-2 | 20-5 | 24-4 | |
Southern Pine | #2 | 8-5 | 13-3 | 17-5 | 21-2 | 24-10 | 8-4 | 11-11 | 15-4 | 18-4 | 21-6 | |
Southern Pine | #3 | 7-3 | 10-8 | 13-7 | 16-0 | 19-1 | 6-3 | 9-3 | 11-9 | 13-10 | 16-6 | |
Spruce-Pine-Fir | SS | 8-3 | 12-11 | 17-1 | 21-9 | 26-0 | 8-3 | 12-11 | 17-1 | 21-0 | 24-4 | |
Spruce-Pine-Fir | #1 | 8-1 | 12-8 | 16-7 | 20-3 | 23-6 | 7-9 | 11-4 | 14-4 | 17-7 | 20-4 | |
Spruce-Pine-Fir | #2 | 8-1 | 12-8 | 16-7 | 20-3 | 23-6 | 7-9 | 11-4 | 14-4 | 17-7 | 20-4 | |
Spruce-Pine-Fir | #3 | 6-9 | 9-11 | 12-7 | 15-4 | 17-9 | 5-10 | 8-7 | 10-10 | 13-3 | 15-5 | |
24 | Douglas Fir-Larch | SS | 8-3 | 13-0 | 17-2 | 21-10 | 26-0 | 8-3 | 13-0 | 16-7 | 20-3 | 23-5 |
Douglas Fir-Larch | #1 | 8-0 | 12-6 | 15-10 | 19-5 | 22-6 | 7-5 | 10-10 | 13-9 | 16-9 | 19-6 | |
Douglas Fir-Larch | #2 | 7-10 | 11-9 | 14-10 | 18-2 | 21-0 | 6-11 | 10-2 | 12-10 | 15-8 | 18-3 | |
Douglas Fir-Larch | #3 | 6-1 | 8-10 | 11-3 | 13-8 | 15-11 | 5-3 | 7-8 | 9-9 | 11-10 | 13-9 | |
Hem-Fir | SS | 7-10 | 12-3 | 16-2 | 20-8 | 25-1 | 7-10 | 12-3 | 16-2 | 19-10 | 23-0 | |
Hem-Fir | #1 | 7-8 | 12-0 | 15-6 | 18-11 | 21-11 | 7-3 | 10-7 | 13-5 | 16-4 | 19-0 | |
Hem-Fir | #2 | 7-3 | 11-5 | 14-8 | 17-10 | 20-9 | 6-10 | 10-0 | 12-8 | 15-6 | 17-11 | |
Hem-Fir | #3 | 6-1 | 8-10 | 11-3 | 13-8 | 15-11 | 5-3 | 7-8 | 9-9 | 11-10 | 13-9 | |
Southern Pine | SS | 8-1 | 12-9 | 16-10 | 21-6 | 26-0 | 8-1 | 12-9 | 16-10 | 21-6 | 26-0 | |
Southern Pine | #1 | 8-0 | 12-6 | 16-6 | 21-1 | 25-2 | 8-0 | 12-3 | 15-4 | 18-3 | 21-9 | |
Southern Pine | #2 | 7-10 | 12-3 | 15-10 | 18-11 | 22-2 | 7-5 | 10-8 | 13-9 | 16-5 | 19-3 | |
Southern Pine | #3 | 6-5 | 9-6 | 12-1 | 14-4 | 17-1 | 5-7 | 8-3 | 10-6 | 12-5 | 14-9 | |
Spruce-Pine-Fir | SS | 7-8 | 12-0 | 15-10 | 20-2 | 24-7 | 7-8 | 12-0 | 15-4 | 18-9 | 21-9 | |
Spruce-Pine-Fir | #1 | 7-6 | 11-9 | 14-10 | 18-2 | 21-0 | 6-11 | 10-2 | 12-10 | 15-8 | 18-3 | |
Spruce-Pine-Fir | #2 | 7-6 | 11-9 | 14-10 | 18-2 | 21-0 | 6-11 | 10-2 | 12-10 | 15-8 | 18-3 | |
Spruce-Pine-Fir | #3 | 6-1 | 8-10 | 11-3 | 13-8 | 15-11 | 5-3 | 7-8 | 9-9 | 11-10 | 13-9 |
Deleted
TABLE 2308.10.3(3)
RAFTER SPANS FOR COMMON LUMBER SPECIES
(Ground Snow Load = 30 pounds per square foot, Ceiling Not Attached to Rafters, L/Δ = 180)
RAFTER SPACING (inches) | SPECIES AND GRADE | DEAD LOAD = 10 pounds per square foot | DEAD LOAD = 20 pounds per square foot | |||||||||
2 × 4 | 2 × 6 | 2 × 8 | 2 × 10 | 2 × 12 | 2 × 4 | 2 × 6 | 2 × 8 | 2 × 10 | 2 × 12 | |||
Maximum rafter spans | ||||||||||||
(ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | (ft. - in.) | |||
12 | Douglas Fir-Larch | SS | 10-0 | 15-9 | 20-9 | 26-0 | 26-0 | 10-0 | 15-9 | 20-1 | 24-6 | 26-0 |
Douglas Fir-Larch | #1 | 9-8 | 14-9 | 18-8 | 22-9 | 26-0 | 9-0 | 13-2 | 16-8 | 20-4 | 23-7 | |
Douglas Fir-Larch | #2 | 9-5 | 13-9 | 17-5 | 21-4 | 24-8 | 8-5 | 12-4 | 15-7 | 19-1 | 22-1 | |
Douglas Fir-Larch | #3 | 7-1 | 10-5 | 13-2 | 16-1 | 18-8 | 6-4 | 9-4 | 11-9 | 14-5 | 16-8 | |
Hem-Fir | SS | 9-6 | 14-10 | 19-7 | 25-0 | 26-0 | 9-6 | 14-10 | 19-7 | 24-1 | 26-0 | |
Hem-Fir | #1 | 9-3 | 14-4 | 18-2 | 22-2 | 25-9 | 8-9 | 12-10 | 16-3 | 19-10 | 23-0 | |
Hem-Fir | #2 | 8-10 | 13-7 | 17-2 | 21-0 | 24-4 | 8-4 | 12-2 | 15-4 | 18-9 | 21-9 | |
Hem-Fir | #3 | 7-1 | 10-5 | 13-2 | 16-1 | 18-8 | 6-4 | 9-4 | 11-9 | 14-5 | 16-8 | |
Southern Pine | SS | 9-10 | 15-6 | 20-5 | 26-0 | 26-0 | 9-10 | 15-6 | 20-5 | 26-0 | 26-0 | |
Southern Pine | #1 | 9-8 | 15-2 | 20-0 | 24-9 | 26-0 | 9-8 | 14-10 | 18-8 | 22-2 | 26-0 | |
Southern Pine | #2 | 9-6 | 14-5 | 18-8 | 22-3 | 26-0 | 9-0 | 12-11 | 16-8 | 19-11 | 23-4 | |
Southern Pine | #3 | 7-7 | 11-2 | 14-3 | 16-10 | 20-0 | 6-9 | 10-0 | 12-9 | 15-1 | 17-11 | |
Spruce-Pine-Fir | SS | 9-3 | 14-7 | 19-2 | 24-6 | 26-0 | 9-3 | 14-7 | 18-8 | 22-9 | 26-0 | |
Spruce-Pine-Fir | #1 | 9-1 | 13-9 | 17-5 | 21-4 | 24-8 | 8-5 | 12-4 | 15-7 | 19-1 | 22-1 | |
Spruce-Pine-Fir | #2 | 9-1 | 13-9 | 17-5 | 21-4 | 24-8 | 8-5 | 12-4 | 15-7 | 19-1 | 22-1 | |
Spruce-Pine-Fir | #3 | 7-1 | 10-5 | 13-2 | 16-1 | 18-8 | 6-4 | 9-4 | 11-9 | 14-5 | 16-8 | |
16 | Douglas Fir-Larch | SS | 9-1 | 14-4 | 18-10 | 23-9 | 26-0 | 9-1 | 13-9 | 17-5 | 21-3 | 24-8 |
Douglas Fir-Larch | #1 | 8-9 | 12-9 | 16-2 | 19-9 | 22-10 | 7-10 | 11-5 | 14-5 | 17-8 | 20-5 | |
Douglas Fir-Larch | #2 | 8-2 | 11-11 | 15-1 | 18-5 | 21-5 | 7-3 | 10-8 | 13-6 | 16-6 | 19-2 | |
Douglas Fir-Larch | #3 | 6-2 | 9-0 | 11-5 | 13-11 | 16-2 | 5-6 | 8-1 | 10-3 | 12-6 | 14-6 | |
Hem-Fir | SS | 8-7 | 13-6 | 17-10 | 22-9 | 26-0 | 8-7 |