Doug Fir and the NW Timber Basket
In the Northwest "Timber Basket", the Douglas fir reigns supreme. An amazing tree, the Doug fir is not only North America's most plentiful softwood species, accounting for one fifth of the continent's total softwood reserves, it is also a champion timber producer, yielding more timber than any other tree on the continent. But the Doug fir's best trait is its natural dimensional stability, making it the ideal choice for structural and general-purpose wood for framing lumber.
The physical properties of the Doug fir allow it to be useful for a variety of applications. Boasting a high modulus of elasticity (the highest of the North American softwood species), Doug fir resists deflection, making it perfect for the design of flooring and other systems. It also has the highest ratings of any Western softwood for extreme fiber stress in bending; for tension parallel-to-grain; for horizontal sheer; for compression perpendicular-to-grain; and for compression parallel-to-grain.
Finally, Doug fir is a beautiful wood that is tightly knotted and close-grained. Combining this aesthetic appeal with its structural capabilities makes it, for many, the standard against which all other framing lumber is judged.
Rosboro Products

The Substance Behind the Reputation
In the competitive fields of engineered wood, dimensional lumber, and panel products, Rosboro has become known for quality, consistency, and service.
Our goal is to make it easier for our customers to do business with Rosboro, which requires the highest caliber of customer care and a family of products that continuously delivers the finest glulam, lumber, and plywood offerings to the marketplace. These respected products represent the substance behind the great reputation.
Glulam
For many builders, glulam is already the engineered wood of choice. Rosboro is raising the bar with stronger, more efficient glulam products.
Rosboro X-Beam™
Signaling the end of costly shimming and filling on the job site, Rosboro's groundbreaking X-Beam is the industry's first full framing-width glulam in Architectural Appearance. Rosboro X-Beam is the most cost effective engineered wood product on the market and is available in traditional and I-Joist compatible depths, as well as 9-1/4" and 11-1/4" depths to match standard 2 x 10 and 2 x 12 framing.
Rosboro BigBeam®
Our highest strength glulam product, Rosboro I-joist compatible BigBeam (30F) is the perfect solution for engineered floor systems.
Custom Glulam
For increased convenience and flexibility, Rosboro now offers Custom Glulam that can be manufactured per customers' drawings. Features include curves, lengths to 100', fabrication, premium appearance, and species options like Alaska yellow cedar, Port Orford cedar, and Douglas fir.
Treated Glulam
Ideally suited for outdoor applications like decks, porches, trellises, and balconies, our 24F Treated Glulam helps prevent rot, decay and time-consuming callbacks.
RMT®
A glulam product that's interchangeable with solid-sawn lumber of similar size and grade, Rosboro RMT is available in lengths up to 60 feet and comes in #1 and Select grades. DSA-approved in California.
Tall Wall (Framing System)
Maximizing glulam's design values and weight advantages, our Tall Wall structural framing system is sized to match standard 2x framing.
Lumber
Studs
Shipped by car, truck, or van, our green and kiln-dried (Douglas fir and hemlock) Studs are produced to 8', 9', and 10' lengths.
Timbers
Signature quality, with light to no wane for 4x6 through 4x12 and 8' to 20', makes Rosboro Timbers a top choice among today's discerning builders.
Plywood
Construction Grade
A dependable, high-quality sheathing-grade panel, Rosboro Construction Grade Plywood offers excellent stability.
Industrial Grade
Rosboro Industrial Grade Plywood available in CCP & TS and Sturd-i-Floor® grades; custom lay-ups and sizes; and tongue & groove and shiplap edges.
Medium Density Overlay (MDO)
With a smooth surface and various lengths, lay-ups and thicknesses, our MDO concrete-form and general use MDO selections are manufactured for strength and stability.