Nds Timber Design Values: DOUGLAS FIR-LARCH
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DOUGLAS FIR-LARCH | Construction | 1,500,000 | 550,000 | 1,000 | 625 | 1,650 | 650 | 180 | 0.5 | WCLIB, WWPA | 2" - 4" wide | NDS-2018 Supplement | 4A |
| DOUGLAS FIR-LARCH | Dense No. 1|Beams and Stringers|4D | 1,700,000 | 620,000 | 1,550 | 730 | 1,100 | 775 | 170 | 0.5 | WCLIB | Beams and Stringers | NDS-2018 Supplement | 4D |
| DOUGLAS FIR-LARCH | Dense No. 1|Posts and Timbers|4D | 1,700,000 | 620,000 | 1,400 | 730 | 1,200 | 950 | 170 | 0.5 | WCLIB | Posts and Timbers | NDS-2018 Supplement | 4D |
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