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Managing for Wood Quality

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Part of the book series: Managing Forest Ecosystems ((MAFE,volume 8))

Abstract

During the 20th century, the Pacific Northwest (western Oregon and Washington, coastal British Columbia, and southeastern Alaska) produced some of the highest quality timber in North America. Forests were old and trees were large; wood products from this region were easily distinguished from those made from timber produced in other regions in North America. In some cases, the timber had unique visual characteristics; its slow growth produced clear wood and tight grain patterns and its superior mechanical properties were prized. The sheer size of the trees made it possible to manufacture extremely large pieces. Early in the century, Douglas-fir trees (Pseudotsuga menziesii (Mirb.) Franco) (at the time also known as Oregon pine) that were tall and cylindrical possessed a stiffness that made them valuable as ships’ masts (Allin 1995). Later, these same characteristics made this species important as electric power transmission poles. Long spans, made possible by the high strength and stiffness of Douglas-fir, allowed architects to create distinctive open interior spaces. Several mills specialized in beams up to 185 feet (57 meters (m)) long and several feet deep. The fine grain and infrequent knots in large old trees permitted manufacture of clear, straight-grained moulding and millwork that was valued around the world in door and window manufacturing. The high strength-to-weight ratio of Sitka spruce (Picea sitchensis (Bong.) Carr.) was attractive to early airplane manufacturers and to musical instrument craftsmen who valued the tonal quality derived from its straight, even grain (Burns and Honkala 1990).

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Barbour, R.J., Marshall, D.D., Lowell, E.C. (2003). Managing for Wood Quality. In: Monserud, R.A., Haynes, R.W., Johnson, A.C. (eds) Compatible Forest Management. Managing Forest Ecosystems, vol 8. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-0309-3_11

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