Red Alder
Common Name(s): Red Alder, Western Red Alder
Scientific Name: Alnus rubra
Distribution: Coastal western North America
Tree Size: 100-130 ft (30-40 m) tall, 2-3 ft (.6-1.0 m) trunk diameter
Average Dried Weight: 28 lbs/ft3 (450 kg/m3)
Specific Gravity (Basic, 12% MC): .37, .45
Janka Hardness: 590 lbf (2,620 N)
Modulus of Rupture: 9,800 lbf/in2 (67.6 MPa)
Elastic Modulus: 1,380,000 lbf/in2 (9.52 GPa)
Crushing Strength: 5,820 lbf/in2 (40.1 MPa)
Shrinkage: Radial: 4.4%, Tangential: 7.3%, Volumetric: 12.6%, T/R Ratio: 1.7
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