North American Western Larch Wood

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North American Western Larch Wood
Categories:	Wood and Natural Products; Wood; Softwood
Material Notes:	Data is based on small, clear, air-dried samples unless specified. Property values marked by an asterisk (*) have been taken from an unusually old reference source.
Key Words:	Larix occidentalis; Lumber, Timber
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Physical Properties	Original Value	Comments

Density	0.480 g/cc	Oven Dry Weight/Unseasoned Volume
	48.0 lb/ft³	Unseasoned*

Mechanical Properties	Original Value	Comments
Hardness, Wood Indentation	2000 N	Side. Force required to imbed a 0.444 inch steel ball to one-half its diameter
	2100 N	End. Force required to imbed a 0.444 inch steel ball to one-half its diameter
	3700 N	Side
Tensile Strength, Ultimate	3.00 MPa	Perpendicular to Grain
	134 MPa	Axial
	230 psi	Perpendicular to Grain*
Modulus of Rupture	0.0960 GPa	Static Bending
	7.50 ksi	Static Bending*
Flexural Yield Strength	4600 psi	Fiber Stress at Elastic Limit; Static Bending*
Flexural Modulus	13.52 GPa	Static Bending
	1350 ksi	Static Bending*
Compressive Strength	6.80 MPa	Perpendicular to Grain
	56.0 MPa	Parallel to Grain
	560 psi	Perpendicular to Grain*
	3250 psi	Parallel to Grain*
	3800 psi	Max Crushing Strength Parallel to Grain*
Poissons Ratio	0.276	µ_LT, 12% Moisture Content
	0.352	µ_TR, 12% Moisture Content
	0.355	µ_LR, 12% Moisture Content
	0.389	µ_RT, 12% Moisture Content
Shear Strength	9.70 MPa	Orientation Unknown
	920 psi	Parallel to Grain*
Impact	3.7	in-lb/in³; Work to Elastic Limit; Unseasoned Sample; Impact Bending*
	9400	psi; Fiber Stress at Elastic Limit; Unseasoned Sample; Impact Bending*
Work to Elastic Limit	1.01 in-lb/in³	Static Bending*
Work to Maximum Load	7.10 in-lb/in³	Static Bending*
Toughness	23.8 J	Radial
	38.5 J	Tangential

Thermal Properties	Original Value	Comments
Thermal Conductivity	0.880 BTU-in/hr-ft²-°F	Oven Dry
	1.10 BTU-in/hr-ft²-°F	12% Moisture Content
Shrinkage	4.2 %	Radial; Green to Zero Moisture
	8.1 %	Tangential; Green to Zero Moisture
	13.2 %	Volumetric; Green to Zero Moisture

References for this datasheet.

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