Oregon pine or Douglas fir wood is one of the most widely used in the construction world, where it is abundant. It offers an excellent resistance-to-weight ratio and is easy to work with.

This tree can reach 75 meters in height, being one of the largest conifers in the world. In fact, it is the third, behind only two types of sequoia.

Scientific name: Pseudotsuga menziesii. Their common names are Oregon pine, Douglas pine or yellow pine. Interestingly, the Douglas fir is not really a fir, it does not belong to the family abies, but it is also not a pine tree. Tsuga It is a genre to which the family belongs pinaceae, that of pines, and Pseudotsuga means false tsuga. However, it has important similarities with the two types of wood, pine and spruce.

Oregon pine wood originates in western North America, but has also become common in Europe as a species used for reforestation. In Spain, it has been used for this purpose since the 1990s, much later than in other countries such as France or the United Kingdom.

Features of Douglas Fir or Oregon Pine Wood

Color: Pale yellow sapwood, yellowish brown heartwood. The color changes with the age of the wood.

Characteristic defects: Frequent nodes.

Fiber: Direct.

Grain: Medium to thick.

Density: Semi-heavy wood of about 540 kg / m3 at 12% humidity.

Toughness: It is a semi-hard wood with 3.2 in the Monnin test.

Durability: Medium durability against fungi. Susceptible to insect attack.

Dimensional stability:

  • Volumetric contraction coefficient: 0.46% moderately nervous wood.

Mechanical properties:

  • Compressive strength: 525 kg / cmtwo
  • Static flexural strength: 860 kg / cmtwo
  • Modulus of elasticity: 128,000 kg / cmtwo

Impregnation: Heartwood not impregnable, sapwood medium to slightly impregnable.

Workability: Douglas fir is generally an easy wood to work with.

  • Sawn. Smoothly.
  • Drying. Easy, with little risk of cracking.
  • Brushed. The appearance of resin deposits can create a small problem.
  • Glued. Smoothly.
  • Nailed and screwed. Smoothly.
  • Finish. It is convenient to apply primer to homogenize the wood.

Price: Moderate.

Uses of this wood

  • Internal and external furniture.
  • Carpentry assembly.
  • Interior and exterior carpentry: doors, windows, friezes …
  • Veneers and plywood boards.
  • Paper making.
  • Firewood.