Its reddish-brown heartwood is distinctive from its cream white sapwood. Douglas fir is straight grained,
with medium texture and sound knots.
Overview
Douglas firs are medium-size to extremely large evergreen trees, 20–100 meters (70–330 ft) tall (although
only coast Douglas firs reach such great height).[4] The leaves are flat, soft, linear, 2–4 centimeters
(0.8–1.6 in) long, generally resembling those of the firs, occurring singly rather than in fascicles; they
completely encircle the branches, which can be useful in recognizing the species. The female cones are
pendulous, with persistent scales (unlike true firs), and are distinctive in having a long tridentine
(three-pointed) bract that protrudes prominently above each scale (it resembles the back half of a mouse,
with two feet and a tail).
Main Uses
Used in Construction, Kitchens, Flooring and Furniture.
Working Properties
Its reddish-brown heartwood is distinctive from its cream white sapwood. Douglas fir is straight grained,
with medium texture and sound knots.
Durability
Douglas Fir is naturally durable: Heartwood is resistant to mushrooms. Douglas-Fir can be used in Class 3
(timber exposed to weathering). Impregnation must be done by Vacuum pressure treatment.
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