Nds Timber Design Values: NORTHERN SPECIES
NDS (National Design Specification) reference design values for visually graded dimension lumber — bending, tension, shear, compression, and modulus of elasticity
| species | grade | E psi (psi) | Emin psi (psi) | Fb psi (psi) | Fc perp psi (psi) | Fc psi (psi) | Ft psi (psi) | Fv psi (psi) | G | grading rules agency | size classification | standard | table id |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NORTHERN SPECIES | Construction | 1,000,000 | 370,000 | 700 | 350 | 1,050 | 325 | 110 | 0.35 | NLGA | 2" - 4" wide | NDS-2018 Supplement | 4A |
| NORTHERN SPECIES | No. 1/ No. 2 | 1,100,000 | 400,000 | 625 | 350 | 850 | 275 | 110 | 0.35 | NLGA | 2" & wider | NDS-2018 Supplement | 4A |
| NORTHERN SPECIES | No. 3 | 1,000,000 | 370,000 | 350 | 350 | 500 | 150 | 110 | 0.35 | NLGA | 2" & wider | NDS-2018 Supplement | 4A |
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