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Nds Timber Design Values: DOUGLAS FIR-LARCH
Standard to Utility
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 | Standard | 1,400,000 | 510,000 | 575 | 625 | 1,400 | 375 | 180 | 0.5 | WCLIB, WWPA | 2" - 4" wide | NDS-2018 Supplement | 4A |
| DOUGLAS FIR-LARCH | Stud | 1,400,000 | 510,000 | 700 | 625 | 850 | 450 | 180 | 0.5 | WCLIB, WWPA | 2" & wider | NDS-2018 Supplement | 4A |
| DOUGLAS FIR-LARCH | Utility | 1,300,000 | 470,000 | 275 | 625 | 900 | 175 | 180 | 0.5 | WCLIB, WWPA | 2" - 4" wide | NDS-2018 Supplement | 4A |
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