Plywood Design Fundamentals - Canadian Plywood Association

2012_april revised_48945_en_design.qxd 19/04/2012 3:04 PM Page 17
(1) For specified stiffness in bending on edge, use axial stiffness values.
(2) Tabulated values are based on dry service conditions and standard-term duration of load.
(3) Specified strength in bearing (normal to plane of panel) qp = 4.5 MPa.
(4) Design values for high strength COFIFORM and COFIFORM PLUS concrete form panels are available from CertiWood
(5) All capacities are per 1 mm unit width
(6) Asterisk identifies panel with number of plies most commonly produced
7.5 3 190 38 83 23 93 40 18 3.74 1.2 0.72 0.72 340,000 17,000 55,000 24,000 3,400
9.5 3* 270 51 83 27 93 46 23 3.9 1.3 0.55 0.72 610,000 27,000 55,000 28,000 4,300
12.5 3 470 110 120 38 140 66 30 6.3 1.9 0.72 0.72 1,400,000 79,000 81,000 39,000 5,700
12.5 4* 420 130 83 55 93 96 30 5.3 2.8 0.55 0.72 1,300,000 190,000 55,000 57,000 5,700
12.5 5 450 200 120 71 130 79 30 7.3 3.7 0.72 0.72 1,400,000 350,000 79,000 47,000 5,700
15.5 4 600 230 89 72 99 130 38 6.6 3.6 0.55 0.72 2,300,000 430,000 59,000 75,000 7,100
15.5 5* 600 280 120 71 130 79 38 9.1 4.9 0.72 0.72 2,300,000 630,000 79,000 47,000 7,100
15.5 6 580 310 120 71 130 79 38 6.9 4.1 0.55 0.55 2,400,000 760,000 79,000 47,000 7,100
18.5 5 770 460 120 100 140 120 46 8.7 5.0 0.55 0.55 3,600,000 1,300,000 83,000 69,000 8,600
18.5 6* 740 430 120 71 130 79 46 8.3 5.1 0.55 0.55 3,600,000 1,300,000 79,000 47,000 8,600
18.5 7 840 450 150 110 170 120 46 9.7 7.1 0.72 0.72 3,900,000 1,400,000 100,000 71,000 8,600
20.5 5 900 740 150 130 170 150 51 9.9 5.7 0.55 0.55 4,600,000 2,600,000 100,000 89,000 9,500
20.5 6 840 550 120 71 130 79 51 9.3 5.8 0.55 0.55 4,600,000 1,900,000 79,000 47,000 9,500
20.5 7 960 560 150 110 170 120 51 11 8.5 0.72 0.72 4,900,000 2,000,000 100,000 71,000 9,500
20.5 8 900 560 150 110 170 120 51 8.3 6.4 0.55 0.55 4,800,000 2,100,000 100,000 71,000 9,500
22.5 6 1,000 720 200 100 220 120 54 14 6.8 0.72 0.55 5,600,000 2,800,000 130,000 69,000 10,000
22.5 7* 1,000 580 150 110 170 120 54 12 9.5 0.72 0.72 5,700,000 2,200,000 100,000 71,000 10,000
22.5 8 1,100 560 150 110 170 120 54 9.0 6.9 0.55 0.55 6,000,000 2,300,000 100,000 71,000 10,000
22.5 9 1,200 730 190 140 210 160 54 12 8.8 0.72 0.72 6,400,000 3,100,000 130,000 95,000 10,000
25.5 7 1,300 880 180 150 200 160 61 13 10 0.72 0.72 7,900,000 3,900,000 120,000 98,000 12,000
25.5 8* 1,300 690 150 110 170 120 61 10 8.4 0.55 0.55 8,000,000 3,400,000 100,000 71,000 12,000
25.5 9 1,400 810 190 140 210 160 61 13 9.7 0.72 0.72 8,400,000 3,700,000 130,000 95,000 12,000
25.5 10 1,400 920 190 140 210 160 61 10 7.8 0.55 0.55 8,800,000 4,400,000 130,000 95,000 12,000
28.5 8 1,500 950 160 130 180 140 68 11 9.7 0.55 0.55 10,000,000 5,400,000 110,000 85,000 13,000
28.5 9* 1,500 970 190 140 210 160 68 15 11 0.72 0.72 11,000,000 5,200,000 130,000 95,000 13,000
28.5 10 1,600 890 190 140 210 160 68 12 8.7 0.55 0.55 11,000,000 5,100,000 130,000 95,000 13,000
28.5 11 1,700 1,100 230 180 250 200 68 14 12 0.72 0.72 12,000,000 6,100,000 150,000 120,000 13,000
31.5 8 1,800 1,400 200 170 230 190 76 12 11 0.55 0.55 14,000,000 8,800,000 140,000 110,000 14,000
31.5 9 1,800 1,300 200 170 230 190 76 17 13 0.72 0.72 14,000,000 7,900,000 140,000 110,000 14,000
31.5 10* 1,800 1,000 190 140 210 160 76 13 10 0.55 0.55 14,000,000 6,700,000 130,000 95,000 14,000
31.5 11 1,900 1,300 230 180 250 200 76 16 13 0.72 0.72 15,000,000 7,700,000 150,000 120,000 14,000
31.5 12 1,900 1,200 230 180 250 200 76 12 9.9 0.55 0.55 15,000,000 7,500,000 150,000 120,000 14,000
17
0° 90° 0° 90° 0° 90° 0°& 90° 0° 90° 0° 90° 0° 90° 0° 90° 0°& 90°
(N·mm/mm) (N/mm) (N/mm) (N/mm) (N/mm) (MPa) (Nmm²/mm) (N/mm)
(N/mm)
Orientation of applied force relative to face grain
Nominal
thickness
(mm)
Number of
plies
m p
t p p p vpb vpf
v p
bb = EI ba = EA
bv
Bending, Shear in plane
Bending Strength Axial Tension Strength Axial Compression Strength
Shear
Through-
Thickness
Strength
Bending Stiffness
Planar Shear Strength
Axial Stiffness (in Tension or
Compression)
Shear-
Through-
Thickenss
Rigidity
Table 14 - Specified Strength, Stiffness and Rigidity Capacities (per 1 mm width) for Unsanded Regular Grades of CANPLY EXTERIOR Canadian Softwood Plywood
(CSP) and Aspen plywood Certified to CSA O151
certiWood Canply plywood Design Fundamentals