Douglas Fir

Douglas -fir

Log Species- Douglas Fir


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Douglas Fir

The massive, fine grained Douglas firs (Pseudotsuga menziesii) which grow in abundance along Canada's west coast provided British Columbia's very first cargoes of export lumber as long ago as 1865. Yet over 75 percent of the Douglas fir harvested today is still fine grained timber, characterized by exceptional strength, hardness and durability. The tree has a long, straight trunk with very little taper, and in heavy stands is free of branches for two-thirds or more of its height, yielding a high percentage of clear and near-clear wood in long lengths and large sizes. Douglas fir is the only redwood-type material still available in substantial volumes of clear wood fiber.

Even second-growth Douglas fir from British Columbia, the product of many years of reforestation, has achieved the mature characteristics and dimensions which cannot be matched by faster-growing plantation softwoods from other timber-producing regions of the world.

The combination of qualities that distinguish Douglas fir - its tough strong fiber, high strength in relation to its weight, and durability combined with dense grain structure and fine texture - gives this wood exceptional versatility. It is highly regarded and widely specified both for the most demanding structural applications and for joinery and architectural millwork of the best quality.

Douglas fir's strength and the large dimensions in which it is available make structural uses the outstanding field for this species. Available in 38mm thickness in a variety of widths and in square and rectangular sizes from 140 x 140mm to 343 x 343mm and in lengths up to 11m, Douglas fir is a preferred choice for all types of glued-laminated and solid timber heavy duty construction such as pilings, wharves, restless, railway sleepers, bridge components, and warehouse construction. It is also employed in traditionally designed residential structures as well as in churches, schools, halls, and commercial buildings which feature large exposed load-bearing members.

The easy workability and high strength-to-weight ratio of Douglas fir complement its structural strength to provide builders with an ideal general purpose wood for all phases of residential or light commercial timber frame construction. Douglas fir is stable in use, holds nails and screws securely, readily accepts glues, and is boldly attractive when left exposed to view in applications such as post and beam construction.

The hardness, texture and attractive coloration of Douglas fir rival those of many hardwoods commonly used in the manufacture of windows, doors, roller blinds, moldings, ceilings, furniture and interior trim. The wood is easy to dry, particularly in clear grades and exhibits little tendency to check, warp, cup, twist, or split.

Being structurally dependable and highly resistant to mechanical abrasion and chemical reaction, Douglas fir is frequently specified for the fabrication of vats, tanks, containers, flumes, conduits and similar industrial components which call for an inert material with a long life under rigorous service conditions.

For strength, versatility and beauty, few woods in the wood match the magnificent Douglas fir.


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