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Douglas-fir is one of the world's best timber-producing species and yields more timber than any other species in North America, making the forestlands of western Oregon, Washington, and British Columbia the most productive on the continent. In 2011, Douglas-fir represented 34.2% of US lumber exports, to a total of 1.053 billion board-feet.
Taylor reports [10] this optical data can be supplemented using a system such as an Impulse200LR laser and Mapsmart software [12] to target tight areas where cloud density is low and/or not reachable by optical scanning technology, provided a properly scaled skeleton framework is established with the MapSmart/Impulse200 combination first.
Softwood plywood is usually made either of cedar, Douglas fir or spruce, pine, and fir (collectively known as spruce-pine-fir or SPF) or redwood and is typically used for construction and industrial purposes. [12] The most common dimension is 1.2 by 2.4 metres (3 ft 11 in × 7 ft 10 in) or the slightly larger imperial dimension of 4 feet × 8 feet.
Coast Douglas-fir seed cone, from a tree grown from seed collected by David Douglas Pseudotsuga menziesii var. menziesii has attained heights of 393 feet (120* m). That was the estimated height of the tallest conifer ever well-documented, the Mineral Tree ( Mineral, Washington ), measured in 1924 by Dr. Richard E. McArdle, [ 7 ] former chief of ...
In the United States, pilings are mainly cut from southern yellow pines and Douglas-fir. Treated pilings are available in chromated copper arsenate retentions of 0.60, 0.80 and 2.50 pounds per cubic foot (9.6, 12.8 and 40.0 kg/m 3) if treatment is required.
Coast Douglas Fir Pseudotsuga menziesii var. menziesii: Green 450 26.1 53 ... Density (kg/m 3) Compressive strength (megapascals) Flexural strength (megapascals) ...
Heartwood density [kg/m³] Sapwood density [kg/m³] Acacia acuminata: 1040 [1] Acacia amythethophylla: 1170 [2] Acacia catechu: 880 [3] Acacia confusa: 690-750 [3 ...
Big Lonely Doug is a large Coast Douglas-fir (Pseudotsuga menziesii) tree located in the Gordon River Valley, 10km north of Port Renfrew on Vancouver Island, British Columbia, Canada. It is the second largest Douglas-fir tree in Canada after the Red Creek Fir in nearby San Juan Valley .