Douglas Fir
Description
Douglas Fir is regarded for its distinctive natural attributes; incredible strength, durability, and beauty. It is one of the strongest and most durable softwood available. It is golden-orange in color and known for its quality and range of grades and characteristics, including its exceptionally straight and fine-grained fiber. Due to the excellent strength-to-weight ratio DF is ideal for a wide variety of usage from decorative doors and windows to a wide range of commercial and industrial applications, including framing and structural timbers. Designers, architects, contractors and consumers choose Douglas Fir products when they want the best in structural ability and a clear, tight, straight grain. Douglas Fir products are also excellent for applications where a fine, knotty material is required. Boro Sawmill & Timber Company can manufacture a wide range of sizes, shapes, and patterns to meet your need. We offer lengths from 6 to 60 feet (2 to 18m), sizes that are up to 40'' x 40'', diameters that range from 15 to 74 inches (38 to 190 cm), and we also do custom milling of specialty timber. Douglas Fir is very stable dimensionally with superior nail-holding capability. Doug Fir's superb ability to resist high wind, storm and earthquakes makes it a perfect choice for a wide variety of structural work.
Common Uses
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Veneer, plywood, and structural/construction lumber
Technical Specifications
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Common Name(s): Douglas-Fir
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Scientific Name: Pseudotsuga menziesii
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Distribution: Western North America
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Tree Size: 200-250 ft (60-75 m) tall, 5-6 ft (1.5-2 m) trunk diameter
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Average Dried Weight: 32 lbs/ft3 (510 kg/m3)
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Specific Gravity (Basic, 12% MC): .45, .51
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Janka Hardness: 620 lbf (2,760 N)
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Modulus of Rupture: 12,500 lbf/in2 (86.2 MPa)
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Elastic Modulus: 1,765,000 lbf/in2 (12.17 GPa)
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Crushing Strength: 6,950 lbf/in2 (47.9 MPa)
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Shrinkage: Radial: 4.5%, Tangential: 7.3%, Volumetric: 11.6%, T/R Ratio: 1.6
*Source: The Wood Database; https://www.wood-database.com/