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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.
By far the best-known is the very widespread and abundant North American species Pseudotsuga menziesii, a taxonomically complex species [14] divided into two major varieties (treated as distinct species or subspecies by some botanists): coast Douglas-fir or "green Douglas-fir", on the Pacific coast; and Rocky Mountain Douglas-fir or "interior ...
Oregon-Canadian Forest Products, Inc., known as OCFP or simply Oregon-Canadian, is an American lumber product manufacturer [1] headquartered in North Plains in Oregon's Portland metropolitan area. [2] It has been recognized as one of the top 100 private companies in Oregon. [3]
They are often dismissed as unreliable; however, some are considered plausible and even well documented. One such example is the historic "Mineral Tree," a 393 ft (120 m) Douglas fir. [4] The placard recorded that the Nooksack tree produced 96,345 board feet of the "finest quality" lumber. [5]
Pseudotsuga menziesii var. glauca, or Rocky Mountain Douglas-fir, is an evergreen conifer native to the interior mountainous regions of western North America, from central British Columbia and southwest Alberta in Canada southward through the United States to the far north of Mexico. [2]
Pseudotsuga macrocarpa, commonly called the bigcone spruce or bigcone Douglas-fir, is an evergreen conifer native to the mountains of southern California. It is notable for having the largest (by far) cones in the genus Pseudotsuga , hence the name.
Douglas-fir (Pseudotsuga menziesii) Coast Douglas-fir (Pseudotsuga menziesii var. menziesii) Rocky Mountain Douglas-fir (Pseudotsuga menziesii var. glauca) European yew (Taxus baccata) Fir (Abies) Balsam fir (Abies balsamea) Silver fir (Abies alba) Noble fir (Abies procera) Pacific silver fir (Abies amabilis) Hemlock (Tsuga) Eastern hemlock ...
When testing wood in lumber form, the Janka test is always carried out on wood from the tree trunk (known as the heartwood), and the standard sample (according to ASTM D143) is at 12% moisture content and clear of knots. [3] The hardness of wood varies with the direction of the wood grain. Testing on the surface of a plank, perpendicular to the ...
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