ASD/LRFD Manual - American Wood Council

62 M9: WOOD STRUCTURAL PANELS
Table M9.2-1
Wood Structural Panel Bending Stiffness and Strength
Span
Rating
Stress Parallel to Strength Axis 1 Stress Perpendicular to Strength Axis 1
Plywood
Plywood
3-ply 4-ply 5-ply OSB 3-ply 4-ply 5-ply OSB
PANEL BENDING STIFFNESS, EI (lb-in. 2 /ft of panel width)
24/0 66,000 66,000 66,000 60,000 3,600 7,900 11,000 11,000
24/16 86,000 86,000 86,000 78,000 5,200 11,500 16,000 16,000
32/16 125,000 125,000 125,000 115,000 8,100 18,000 25,000 25,000
40/20 250,000 250,000 250,000 225,000 18,000 39,500 56,000 56,000
48/24 440,000 440,000 440,000 400,000 29,500 65,000 91,500 91,500
16oc 165,000 165,000 165,000 150,000 11,000 24,000 34,000 34,000
20oc 230,000 230,000 230,000 210,000 13,000 28,500 40,500 40,500
24oc 330,000 330,000 330,000 300,000 26,000 57,000 80,500 80,500
32oc 715,000 715,000 715,000 650,000 75,000 165,000 235,000 235,000
48oc 1,265,000 1,265,000 1,265,000 1,150,000 160,000 350,000 495,000 495,000
Multiplier for
Structural I Panels 1.0 1.0 1.0 1.0 1.5 1.5 1.6 1.6
PANEL BENDING STRENGTH, F b S (lb-in./ft of panel width)
24/0 250 275 300 300 54 65 97 97
24/16 320 350 385 385 64 77 115 115
32/16 370 405 445 445 92 110 165 165
40/20 625 690 750 750 150 180 270 270
48/24 845 930 1,000 1,000 225 270 405 405
16oc 415 455 500 500 100 120 180 180
20oc 480 530 575 575 140 170 250 250
24oc 640 705 770 770 215 260 385 385
32oc 870 955 1,050 1,050 380 455 685 685
48oc 1,600 1,750 1,900 1,900 680 815 1,200 1,200
Multiplier for
Structural I Panels 1.0 1.0 1.0 1.0 1.3 1.4 1.5 1.5
1. Strength axis is defined as the axis parallel to the face and back orientation of the flakes or the grain (veneer), which is generally the long panel direction, unless
otherwise marked.
Axial Capacities
Axial Stiffness (EA)
Panel axial stiffnesses listed in Table M9.2-2 are based
on testing according to the principles of ASTM D3501
Method B. Axial stiffness is the capacity to resist axial
strain and is represented as EA. E is the reference axial
modulus of elasticity of the material, and A is the area of
the cross section. The units of EA are pounds per foot of
panel width.
Tension (F t A)
Tension capacities listed in Table M9.2-2 are based
on testing according to the principles of ASTM D3500
Method B. Tension capacity is given as F t A. F t is the
reference tensile stress of the material, and A is the area
of the cross section. The units of F t A are pounds per foot
of panel width.
American Wood Council