What kind of wood is commonly used in ancient wooden buildings?

Douglas fir is generally used in ancient wood structures;

Douglas fir is a kind of building wood, with light sapwood color and narrow width, and heartwood ranging from yellow to reddish brown. The colors of early wood and late wood are obvious respectively, and the band of the latter is deeper and sharper. This color difference leads to different wood grain shapes during flat sawing.

Wood is fine to medium in texture, straight in texture and impervious to water. Douglas fir is one of the strongest commercial cork in Canada. High hardness and strong wear resistance, suitable for brackets, bridge parts, wooden houses, commercial buildings and other places where wear is the factor.

Extended data:

Douglas fir is famous for its excellent strength-to-weight ratio. Its high ratio can provide good nail holding force and fixing force, and it is suitable for making wood frames for residential buildings, small commercial buildings, multi-storey buildings and industrial buildings.

Among the cork trees in North America, Douglas fir not only has high elastic modulus, but also has excellent outermost bending fiber stress, tensile force along grain, transverse shear force, transverse texture pressure and transverse texture pressure. It is precisely because of these physical characteristics, the durability and outstanding shape stability of heartwood that Douglas fir is regarded as the standard for judging the ownership of frame wood by many construction companies all over the world.

Douglas fir is famous for its structural performance and beauty. Douglas fir is the most commonly used wood type when the design structure requires large wooden beams, long-span or special-shaped arches (such as churches, bridges and gymnasiums).

In the construction of residential buildings, commercial buildings, public buildings, tower buildings and water conservancy facilities, structural glued laminated beams made of Douglas fir are often used as horizontal load-bearing frames for roofs, floors and columns. Glued beams are also reliable building materials when building industrial workshops, warehouses, garages and even beautiful building structures.