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Douglas Fir

Scientific Name: Pseudotsuga menziesii

detail of western red cedar weathered beam and sealed siding on the backWhen architects and engineers look for the best in structural lumber, their first choice repeatedly is Douglas Fir. It is dimensionally stable and universally recognized for its superior strength-to-weight ratio. The high specific gravity of this species provides excellent nail and plate-holding ability. It also enjoys a documented superior performance against strong forces resulting from natural phenomena such as winds, storms and earthquakes. Douglas Fir is truly the ideal structural and general purpose wood for framing lumber in residential, light commercial, multi story and industrial construction.

The Douglas Fir/Western Larch species combination has the highest modulus of elasticity (E or MOE) of the North American softwood species. This is the ratio of the amount a piece of lumber will deflect in proportion to an applied load; it is a reflection of the species’ high degree of stiffness, an important consideration in the design of floors and other systems.

In strength properties, this species has the highest ratings of any western softwood for extreme fiber stress in bending (Fb); for tension parallel-to-grain (Ft); for horizontal sheer (Fv); for compression perpendicular-to-grain (Fc); and for compression parallel-to-grain (Fc//).

These physical working properties, as well as to the moderate durability of its heartwood and its excellent dimensional stability, provide the reasons many builders use Douglas Fir as the standard against which all other framing lumber is judged. It is also tight knotted and close-grained, adding the bonus of beauty to its structural capabilities. Photo: above left: Weathered Fir Beam and Channel Siding.
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Douglas Fir Products

DF post and beam iconPost and Beam
For timber frames and rafters Fir combines beauty and strength. The choice structural lumber.

interior paneling in douglas fir iconInterior Paneling
Red and amber tones for your interiors plus the organic patterns of grain will bring your walls to life.

douglas fir boards iconSurfaced Four Sides Boards
Turn these boards into anything you can think of, with a wide variety of grades to choose from.

douglas fir decking iconBoard and Batt Siding
A classic western look, board and batt siding in Fir is economical and functional.

Additional Douglas Fir Products:

Soffits , Trim, Fascia, Interior Paneling , Decking , Rough Cut Boards , Exposed Ceiling and Sidewall

Visit any of our picture galleries:

DF Product Pictures, DF Raw Lumber Pictures

Available Board Grades

douglas fir clear vertical grain sample iconD and Better grade sample icon Selectc Deck grade icon

Available Timber Grades

SELECT STRUCTURAL ICON No. 1 grade icon No. 3 grade icon

Note: all pictures are meant for a general grade description.  If you want to see a more defined grade image, please let us know.  We can email you pictures and grade rules.

Timbers are also available with the following other options: FOHC (free of heart center), KD Kiln dried, R/C Rough cut, S4S surfaced 4 sides and Hand Hewn. Please call for pricing on these options.

Available Patterns

Tongue & Groove , Channel , Pattern 105, V2E , S4S, and many more standard patterns. Custom milling available.

Other Featured Products

douglas fir soffits image« Douglas Fir Soffits : Tongue and Groove V2E is one of the most common soffit options. Also available in Flush Joint, Edge plus center bead and custom patterns.

WRC shingles« Douglas Fir Trim Craftsman, Shaker and many other architectural styles have Clear Vertical Grain and Clear Doug Fir trim as their first choice for tones and serviceability.

More information about Douglas Fir

The straight grained and exceptionally strong Douglas Fir tree is one of the most dominant species in the Northwest forests. After a forest fire, the tree springs to life, growing thickly in the sunshine of a newly open area. Over the past 100 years, it has been the favorite species of silviculturists because of its fast growth and multitude of uses. Its stiffness and durability make it ideal for structural applications. It also makes a good flooring and paneling product as well as a fine trim for doors and windows. Douglas Fir is known for its distinctive grain patterns, produced by the varying degrees of spring and summer wood in the grain. The color differences between the two range from yellowish to reddish brown. Douglas Fir flooring ages to a warm orange-brown color.

peeled logs from our actively managed forestDouglas Fir (Pseudotsuga menziesii) is not a true fir at all, it is a distinct species named after Archibald Menzies, a Scottish physician and naturalist who first discovered the tree on Vancouver Island in 1791, and David Douglas, the Scottish botanist who later identified the tree in the Pacific Northwest in 1826. Douglas Fir is North America’s most plentiful softwood species, accounting for one fifth of the continent’s total softwood reserves The wood of Douglas-fir varies widely in weight and strength. When lumber of high strength is needed for structural uses, selection can be improved by applying the density rule. This rule uses percentage of latewood and rate of growth as they affect density. For equivalent knot sizes, the higher density generally indicates stronger wood. Sapwood of Douglas-fir is narrow in old-growth trees but may be as much as 3 inches (7.62 cm) wide in second-growth trees of commercial size. Fairly young trees of moderate to rapid growth have reddish heartwood and are called red-fir. Very narrow-ringed wood of old trees may be yellowish brown and is known on the market as yellow-fir. The range of Douglas-fir extends from the Rocky Mountains to the Pacific coast and from Mexico to central British Columbia. The Douglas-fir production comes from the Coast States of Oregon, Washington, and California and from the Rocky Mountain States. Douglas-fir reaches heights of 250 feet (76.20 m), with a diameter of 6 feet (1.83 m), in coastal stands that are between 200 and 800 years old. The largest intact specimen was recorded at 330 feet (100.58 m) near Littlerock Washington.

Methow Valley Douglas Fir Peeled Posts and Poles

Bear Creek Lumber has access to an actively managed timber stand. The project is a sustained growth patch of mixed age Douglas Fir and Ponderosa Pine. The stand has been logged twice since 1910 and is presently being thinned. A mixture of middle-aged and old-growth products are being selectively harvested to improve the stand's health. These round wood products can be cut to order for log rafters, poles, posts, vigas and stringers. 6 to 12 inch and large diameters are available. They can be cut to any length. Customers interested in seeing the ecosystem management of a Northwestern forest are welcome to take a tour of the property.
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