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Douglas fir
3.5 usd/kg
Douglas fir, also called Oregon pine, is an evergreen conifer like pine and spruce that yields a slightly superior softwood timber. It is grown across the northern and southern hemispheres and readily available from certified sources. Old growth Douglas fir has been heavily depleted and new timber typically comes from plantations, such as from North and South America, Europe, New Zealand and Australia.
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Sustainability concerns
Non-renewable ingredients
Raw material generates polluting by-products
Low circularity potential
Potentially toxic in use
Laminated veneer lumber (LVL) is a structural lumber produced from wood cut into thin layers (rotary cut veneers) and bonded together with high strength adhesive. The majority of the layers run along the length of the wood’s profile, to optimise strength to weight, with just a few running perpendicular to provide some resistance to twisting. Veneer thickness is typically around 3 mm. LVL sheets and lumber range from 21-75 mm thick, 40 mm to 1.5 m wide, and up to 25 m long. Thicker parts are made possible by gluing multiple layers of LVL together (GLVL). A range of woods are suitable, but spruce and pine are the most popular as a result of their favourable balance of cost, weight and mechanical performance.
Applications include beams and headers, lintels, joists, rafters and ridge beams, truss chords, studs and columns, wall framework, portal frames and components for modular pre-fabricated roof, floor and wall elements. In addition, sheets (much like plywood), can be used in roof, floor and wall construction; doors and windows; and concrete formwork.