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.
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.
| Fb | Bending | 2,000 psi |
| Ft | Tension parallel | 1,500 psi |
| Fv | Shear parallel | 200 psi |
| Fc⊥ | Compression perpendicular | 500 psi |
| Fc | Compression parallel | 2,000 psi |
| E | Modulus of elasticity | 1,800,000 psi |
| Emin | Modulus for stability | 900,000 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.