American Rocky Mountain Douglas Fir Wood

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American Rocky Mountain Douglas Fir Wood
Categories:	Wood and Natural Products; Wood; Softwood
Material Notes:	Marked 'flame-like' growth ring figure. Long lengths and clear grades available. Conifer Usual surface texture: Medium Dimensional changes when dried lumber is subjected to variations in humidity during service: Small Resistance to fungal decay (Heartwood in ground contact): Moderately Durable (10 to 15 years) Resistance to penetration by preservatives: Resistant/Extremely resistant Common Applications: Plywood, interior and exterior joinery, construction. Vats and tanks Property values marked by an asterisk (*) have been taken from an unusually old reference source.
Key Words:	Pseudotsuga Menziesii; Lumber, Timber
Vendors:	No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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Physical Properties	Original Value	Comments

Density	0.400 g/cc	Oven Dry Weight/Unseasoned Volume
	30.0 lb/ft³	Unseasoned*

Mechanical Properties	Original Value	Comments
Hardness, Wood Indentation	1800 N	Side. Force required to imbed a 0.444 inch steel ball to one-half its diameter
	2000 N	End. Force required to imbed a 0.444 inch steel ball to one-half its diameter
Tensile Strength, Ultimate	350 psi	Perpendicular to Grain*
Modulus of Rupture	6.40 ksi	Static Bending*
Flexural Yield Strength	3600 psi	Fiber Stress at Elastic Limit; Static Bending*
Flexural Modulus	1180 ksi	Static Bending*
Compressive Strength	450 psi	Perpendicular to Grain*
	2520 psi	Parallel to Grain*
	3000 psi	Max Crushing Strength Parallel to Grain*
Poissons Ratio	0.029	µ_TL, 12% Moisture Content
	0.036	µ_RL, 12% Moisture Content
	0.292	µ_LR, 12% Moisture Content
	0.374	µ_TR, 12% Moisture Content
	0.39	µ_RT, 12% Moisture Content
	0.449	µ_LT, 12% Moisture Content
Machinability	100 %	Good Relative to Other Wood
Shear Strength	880 psi	Parallel to Grain*
Impact	3.0	in-lb/in³; Work to Elastic Limit; Unseasoned Sample; Impact Bending*
	9100	psi; Fiber Stress at Elastic Limit; Unseasoned Sample; Impact Bending*
Work to Elastic Limit	0.650 in-lb/in³	Static Bending*
Work to Maximum Load	6.80 in-lb/in³	Static Bending*

Thermal Properties	Original Value	Comments
Shrinkage	2.8 %	Radial; Unseasoned to Oven Dry*
	6.6 %	Tangential; Unseasoned to Oven Dry*
	10.3 %	Volumetric; Unseasoned to Oven Dry*

Descriptive Properties
Color	Light reddish-brown	Usual for heartwood

References for this datasheet.

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PTSA560 / 71263

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