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Wood I-joist (representative) - Design Values

Wood I-joist (representative) is a engineered wood (lvl / psl / i-joist) grade with reference design values to Representative - see manufacturer ICC-ES report. Its reference bending value Fb is 2,000 psi, compression parallel Fc is 2,000 psi, and modulus of elasticity E is 1,800,000 psi (NDS). Values are shown before adjustment factors; apply the relevant NDS C-factors or EC5 k_mod and γ_M for your load case.

Fb (bending)
2,000 psi
Fc (compression)
2,000 psi
E (modulus)
1.8M psi

Representative values. Wood I-joists are specified by RATED CAPACITIES (allowable moment M_r, shear V_r, and stiffness EI) per depth and series, not by member stresses. Use the manufacturer's span/load tables and ICC-ES report for design.

Reference design values (NDS 2018)
FbBending2,000 psi
FtTension parallel1,500 psi
FvShear parallel200 psi
Fc⊥Compression perpendicular500 psi
FcCompression parallel2,000 psi
EModulus of elasticity1,800,000 psi
EminModulus for stability900,000 psi

Source: Representative - see manufacturer ICC-ES report. Reference values are shown before adjustment factors (NDS C-factors / EC5 k_mod, γ_M) - apply these per your load case in design.

Other Engineered Wood (LVL / PSL / I-joist) grades

LVL 1.9E (representative)LVL 2.0E (representative)PSL 2.0E (representative)
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