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Nds Timber Design Values: DOUGLAS FIR-LARCH (NORTH)
Select Structural|Beams and Stringers|4D 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 (NORTH) | Select Structural|Beams and Stringers|4D | 1,600,000 | 580,000 | 1,600 | 625 | 1,100 | 950 | 170 | 0.49 | NLGA | Beams and Stringers | NDS-2018 Supplement | 4D |
| DOUGLAS FIR-LARCH (NORTH) | Select Structural|Posts and Timbers|4D | 1,600,000 | 580,000 | 1,500 | 625 | 1,150 | 1,000 | 170 | 0.49 | NLGA | Posts and Timbers | NDS-2018 Supplement | 4D |
| DOUGLAS FIR-LARCH (NORTH) | Standard | 1,400,000 | 510,000 | 525 | 625 | 1,450 | 325 | 180 | 0.49 | NLGA | 2" - 4" wide | NDS-2018 Supplement | 4A |
| DOUGLAS FIR-LARCH (NORTH) | Stud | 1,400,000 | 510,000 | 650 | 625 | 900 | 400 | 180 | 0.49 | NLGA | 2" & wider | NDS-2018 Supplement | 4A |
| DOUGLAS FIR-LARCH (NORTH) | Utility | 1,300,000 | 470,000 | 250 | 625 | 950 | 150 | 180 | 0.49 | NLGA | 2" - 4" wide | NDS-2018 Supplement | 4A |
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