Nds Timber Design Values: DOUGLAS FIR-LARCH (NORTH)
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) | table id |
|---|---|---|---|---|---|---|---|---|---|
| DOUGLAS FIR-LARCH (NORTH) | Construction | 1,500,000 | 550,000 | 950 | 625 | 1,800 | 575 | 180 | 4A |
| DOUGLAS FIR-LARCH (NORTH) | No. 1 & Btr | 1,800,000 | 1,800,000 | 1,150 | 625 | 1,800 | 750 | 180 | 4A |
| DOUGLAS FIR-LARCH (NORTH) | No. 3 | 1,400,000 | 1,400,000 | 475 | 625 | 825 | 300 | 180 | 4A |
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