Douglas Fir

Not a true fir. The strongest and stiffest softwood in wide structural use, and the species that built the American West.

Почему это важно?

Where a design is governed by stiffness rather than cost - long spans, beams, heavy timber frames - Douglas fir is usually the answer, and it anchors the top of the softwood design-value tables.

Where it grows

The US Pacific Northwest and British Columbia, plus substantial planted stands in New Zealand and western Europe.

What it is used for

Beams, joists and rafters, heavy timber and glulam, structural plywood, flooring.

What to watch

Resists preservative penetration, so it is not used for ground-contact treated products in the way southern pine is.