Douglas fir

3.5 usd/kg
Circularity potential
Very high
Strength
High
Production energy
Ultra low
Stiffness
Medium
Embodied CO2
Ultra low
Density
Low

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.


Sustainability concerns
Non-renewable ingredients
Raw material generates polluting by-products
Low circularity potential
Potentially toxic in use


Douglas fir (Douglas-fir) is a high quality plywood. It is utilised for both its advantageous mechanical properties and visually distinctive appearance. Applications span cabinet making and furniture, to construction (floors, walls, ceilings, kitchens and bathrooms) and boat building. It is classed as moderately durable, and so suitable for exterior use as long as it is combined with a suitably durable adhesive. However, it is not considered durable enough to be used in applications with prolonged ground contact without treatment.


Design properties
Cost usd/kg
5-7
Embodied energy MJ/kg
8
Carbon footprint kgCO2e/kg
0.7-1.25
Density kg/m3
430-530
Tensile modulus GPa
7.45-15.2
Tensile strength MPa
44-85
Modulus of rupture MPa
41.4
Compressive strength MPa
38
Hardness Mohs
1
Janka hardness kN
2.3-3.2
Poissons ratio
0.3-0.45
Thermal expansion (µm/m)/ºC
6.1
Thermal conductivity W/mK
0.15-0.18
Temperature min-max °C
-40 to 150
Thermal
insulator
Electrical
insulator