CTE for Wood

		Longitudinal, Tangential and Radial Coefficient, per degree Fahrenheit
Species	Specific Gravity	αl (10-6)	αt (10-6)	αr (10-6)
Fir, white	0.40	1.85	18.1	12.1
Spruce, Sitka	0.42	1.74	17.9	13.2
Redwood	0.42	2.38	19.5	13.1
Douglas Fir	0.51	1.75	23.7	15.5
Cottonwood	0.43	1.60	18.1	12.9
Yellow poplar	0.43	1.76	16.5	15.4
Birch, yellow	0.66	1.86	21.3	17.0
Maple, yellow	0.68	2.12	19.6	14.8

Wood Structures - A Design Guide and Commentary, compiled by Task Committee on Status-of-the-Art: Wood Committee on Wood, ASCE Structural Division, 1975, p 15.