Douglas Fir-Larch(DF-L)

Douglas Fir-Larch           Abbr: D.Fir-L or DF-L
Design values are in pounds per square inch (psi)
Bending Tension parallel to grain  Shear parallel to grain Comp. perp. to grain Comp. parallel to grain Modulus of Elasticity
Grade Size Fb Ft Fv Fc perp Fc E
Emin
Select Structural 2×2 2025 1235 180 625 2185  1,900,000  690,000
2×3
2×4
2×6 1755 1070 2090
2×8 1620 990 1995
2×10 1485 905 1900
2×12 1350 825 1900
No.1 & Btr.* 2×2 1725 1125 180 625 2070  1.800.000  660,000
2×3
2×4
2×6 1495 975 1980
2×8 1380 900 1890
2×10 1265 825 1800
2×12 1150 750 1800
 No.1 & No.2 2×2 1275 750 180 625 1610  1,600,000  580,000
2×3
2×4
2×6 1105 650 1540
2×8 1020 600 1470
2×10 935 550 1400
2×12 850 500 1400
No.3 2×2 710 450 180 625 945  1,400,000  510,000
2×3
2×4
2×6 615 390 905
2×8 570 360 865
2×10 520 330 825
2×12 475 300 825

These size adjusted values are intended for use by qualified designers and can be used in conjunction with the appropriate adjustment factors from the tables in the PDF below. These tables are the same as the ones shown on the page “Design Values for Canadian Species used in the U.S.”

Download the four tables of adjustment factors.