8″x12″ - 4 (1″) rebar
plastic timbers axis y-y axis x-x
English Metric English Metric
Modulus of Elasticity, E 237 681 psi 1 639 MPa 369 332 psi 2 547 MPa
Moment of Inertia, I 447 in4 0.000186 m4 992 in4 0.000413 m4
Stiffness, EI 1.06E 08 lb-in2 305 kN-m2 3.66E 08 lb-in2 1 052 kN-m2
Maximum Yield Stress in Bending 3 421 psi 23.6 MPa 3 868 psi 26.7 MPa
Weight 26 lbs/ft to
32 lbs/ft		 39 kg/m to
48 kg/m		 26 lbs/ft to
32 lbs/ft		 39 kg/m to
48 kg/m
Specific Gravity 0.67-0.82 0.67-0.82 0.67-0.82 0.67-0.82
Compressive Modulus, Ec 150 912 psi 1 041 MPa 150 912 psi 1 041 MPa
Distance from Outer Surface
to Reinforcing Elements		 1.68 in 43 mm 1.74 in 44 mm
Reinforcing Element Diameter 1.00 in 25 mm 1.00 in 25 mm
Number of Reinforcing Elements 4 4 4 4
Corner Radius 2.5 in 64 mm 2.5 in 64 mm
Last Updated: 08.10.04
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8"x12" - 4 (1″) rebar
composite wales axis y-y axis x-x
English Metric English Metric
Modulus of Elasticity, E 304 364 psi 2 099 MPa 492 172 psi 3 394 MPa
Moment of Inertia, I 447 in4 0.000186 m4 992 in4 0.000413 m4
Stiffness, EI 1.36E 08 lb-in2 391 kN-m2 4.88E 08 lb-in2 1 402 kN-m2
Maximum Yield Stress in Bending 4 381 psi 30.2 MPa 5 155 psi 35.5 MPa
Weight 27 lbs/ft to
33 lbs/ft		 41 kg/m to
50 kg/m		 27 lbs/ft to
33 lbs/ft		 41 kg/m to
50 kg/m
Specific Gravity 0.70-0.85 0.70-0.85 0.70-0.85 0.70-0.85
Compressive Modulus, Ec 197 922 psi 1 365 MPa 197 922 psi 1 365 MPa
Distance from Outer Surface
to Reinforcing Elements		 1.55 in 39 mm 1.62 in 41 mm
Reinforcing Element Diameter 1.25 in 32 mm 1.25 in 32 mm
Number of Reinforcing Elements 4 4 4 4
Corner Radius 2.5 in 64 mm 2.5 in 64 mm
Last Updated: 08.10.04
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8"x12" - 4 (1″) rebar
composite timbers axis y-y axis x-x
English Metric English Metric
Modulus of Elasticity, E 344 884 psi 2 378 MPa 565 978 psi 3 902 MPa
Moment of Inertia, I 447 in4 0.000186 m4 992 in4 0.000413 m4
Stiffness, EI 1.54E 08 lb-in2 443 kN-m2 5.61E 08 lb-in2 1 612 kN-m2
Maximum Yield Stress in Bending 4 964 psi 34.2 MPa 5 928 psi 40.9 MPa
Weight 28 lbs/ft to
34 lbs/ft		 41 kg/m to
51 kg/m		 28 lbs/ft to
34 lbs/ft		 41 kg/m to
51 kg/m
Specific Gravity 0.71-0.86 0.71-0.86 0.71-0.86 0.71-0.86
Compressive Modulus, Ec 226 063 psi 1 559 MPa 226 063 psi 1 559 MPa
Distance from Outer Surface
to Reinforcing Elements		 1.49 in 38 mm 1.55 in 39 mm
Reinforcing Element Diameter 1.38 in 35 mm 1.38 in 35 mm
Number of Reinforcing Elements 4 4 4 4
Corner Radius 2.5 in 64 mm 2.5 in 64 mm
Last Updated: 08.10.04
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8"x12" - 4 (1″) rebar
plastic wales axis y-y axis x-x
English Metric English Metric
Modulus of Elasticity, E 388 226 psi 2 677 MPa 644 135 psi 4 441 MPa
Moment of Inertia, I 447 in4 0.000186 m4 992 in4 0.000413 m4
Stiffness, EI 1.74E 08 lb-in2 499 kN-m2 6.39E 08 lb-in2 1 835 kN-m2
Maximum Yield Stress in Bending 5 588 psi 38.5 MPa 6 746 psi 46.5 MPa
Weight 28 lbs/ft to
35 lbs/ft		 42 kg/m to
51 kg/m		 28 lbs/ft to
35 lbs/ft		 42 kg/m to
51 kg/m
Specific Gravity 0.72-0.88 0.72-0.88 0.72-0.88 0.72-0.88
Compressive Modulus, Ec 255 764 psi 1 763 MPa 255 764 psi 1 763 MPa
Distance from Outer Surface
to Reinforcing Elements		 1.43 in 36 mm 1.49 in 38 mm
Reinforcing Element Diameter 1.5 in 38 mm 1.5 in 38 mm
Number of Reinforcing Elements 4 4 4 4
Corner Radius 2.5 in 64 mm 2.5 in 64 mm
Last Updated: 08.10.04
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8"x12" - 4 (1″) rebar
plastic lumber axis y-y axis x-x
English Metric English Metric
Modulus of Elasticity, E 434 229 psi 2 994 MPa 726 185 psi 5 007 MPa
Moment of Inertia, I 447 in4 0.000186 m4 992 in4 0.000413 m4
Stiffness, EI 1.94E 08 lb-in2 558 kN-m2 7.20E 08 lb-in2 2 068 kN-m2
Maximum Yield Stress in Bending 6 250 psi 43.1 MPa 7 606 psi 52.4 MPa
Weight 29 lbs/ft to
35 lbs/ft		 43 kg/m to
53 kg/m		 29 lbs/ft to
35 lbs/ft		 43 kg/m to
53 kg/m
Specific Gravity 0.74-0.90 0.74-0.90 0.74-0.90 0.74-0.90
Compressive Modulus, Ec 286 830 psi 1 978 MPa 286 830 psi 1 978 MPa
Distance from Outer Surface
to Reinforcing Elements		 1.36 in 35 mm 1.43 in 36 mm
Reinforcing Element Diameter 1.63 in 41mm 1.63 in 41 mm
Number of Reinforcing Elements 4 4 4 4
Corner Radius 2.5 in 64 mm 2.5 in 64 mm
Last Updated: 08.10.04
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8"x12" - 4 (1″) rebar
structurally reinforce plastic lumber axis y-y axis x-x
English Metric English Metric
Modulus of Elasticity, E 482 729 psi 3 328 MPa 811 669 psi 5 596 MPa
Moment of Inertia, I 447 in4 0.000186 m4 992 in4 0.000413 m4
Stiffness, EI 2.16E 08 lb-in2 620 kN-m2 8.05E 08 lb-in2 2 312 kN-m2
Maximum Yield Stress in Bending 6 948 psi 47.9 MPa 8 501 psi 58.6 MPa
Weight 29 lbs/ft to
36 lbs/ft		 44 kg/m to
54 kg/m		 29 lbs/ft to
36 lbs/ft		 44 kg/m to
54 kg/m
Specific Gravity 0.75-0.92 0.75-0.92 0.75-0.92 0.75-0.92
Compressive Modulus, Ec 319 066 psi 2 200 MPa 319 066 psi 2 200 MPa
Distance from Outer Surface
to Reinforcing Elements		 1.30 in 33 mm 1.37 in 35 mm
Reinforcing Element Diameter 1.75 in 44 mm 1.75 in 44 mm
Number of Reinforcing Elements 4 4 4 4
Corner Radius 2.5 in 64 mm 2.5 in 64 mm
Last Updated: 08.10.04
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