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Douglas Fir

Douglas fir is named after Scottish botanist David Douglas. The tree itself grows very large and yields a large amount of commercial timber. The wood is very stiff and strong for its weight and is among the hardest and heaviest softwoods.

Douglas Fir

Douglas Fir

  • Distribution: Western North America
  • Tree Size: 200-250 feet tall, 5-6 foot trunk diameter
  • Average Dried Weight: 32 lbs. /ft3
  • Specific Gravity: .45, .51 (12% MC)
  • Janka Hardness: 620lbf
  • Modulus of Rupture: 12,500 lbf/in2
  • Elastic Modulus: 1,765,000 lbf/in2
  • Crushing Strength: 6950 lbf/in2
  • Shrinkage: Radial: 4.5%, Tangential: 7.3%, Volumetric: 11.6%
  • Sustainability: Reported by the IUCN as a species of least concern

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