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	F_b	F_t	F_v	F_c perp	F_c	E	E_min
Select Structural	2x2	2025	1235	180	625	2185	1,900,000	690,000
	2x3
	2x4
	2x6	1755	1070			2090
	2x8	1620	990			1995
	2x10	1485	905			1900
	2x12	1350	825			1900
No.1 & Btr.*	2x2	1725	1125	180	625	2070	1.800.000	660,000
	2x3
	2x4
	2x6	1495	975			1980
	2x8	1380	900			1890
	2x10	1265	825			1800
	2x12	1150	750			1800
No.1 & No.2	2x2	1275	750	180	625	1610	1,600,000	580,000
	2x3
	2x4
	2x6	1105	650			1540
	2x8	1020	600			1470
	2x10	935	550			1400
	2x12	850	500			1400
No.3	2x2	710	450	180	625	945	1,400,000	510,000
	2x3
	2x4
	2x6	615	390			905
	2x8	570	360			865
	2x10	520	330			825
	2x12	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."

PDF document Download the four tables of adjustment factors.

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Canadian Wood Council Members