Douglas Fir (DF)
A strong, stiff softwood species from the Pacific Northwest used for structural framing, beams, and engineered wood products. Higher strength-to-weight ratio than most softwoods.
In Detail
Douglas Fir is widely used for structural framing, glulam beams, LVL, and plywood face veneers. It's graded under WCLIB (West Coast Lumber Inspection Bureau) or WWPA rules. Its tight grain pattern makes it visually attractive for exposed structural members. DF-Larch (Douglas Fir-Larch) is the species group designation on grade stamps and span tables.
Related Materials
LVL (Laminated Veneer Lumber)
Laminated veneer lumber (LVL) is a high-strength engineered wood product made from thin wood veneers bonded with structural adhesive under heat and pressure. It is the most commonly specified engineered beam and header material in residential and light commercial construction.
Glulam (Glued Laminated Timber)
Glulam (glued laminated timber) is a structural engineered wood product made by bonding multiple layers of dimensional lumber with waterproof adhesive. Available in architectural and industrial grades, glulam is used for beams, columns, arches, and exposed structural applications where both strength and appearance matter.