What are the characteristics of American Douglas pine material? What levels can it be divided into?

Douglas fir is a kind of common building wood, which enjoys high popularity in the world, especially in North America. Because Douglas pine has high hardness and strong wear resistance, it is especially suitable for use in brackets, bridge components, wooden houses, commercial buildings and other places. Let's take a look at the characteristics of American Douglas pine material. What levels can it be divided into?

What are the characteristics of American Douglas pine material?

The main results are as follows: 1. Douglas pine has a relatively high proportion, has a certain nailing capacity and fixed capacity, and is widely used in small commercial buildings, residential buildings, industrial buildings and wooden frames of multi-storey buildings. Among the soft wood species in North America, Douglas fir has a high modulus of elasticity. In addition, its fiber stress, transverse shear force, cis-grain tension, cross-grain pressure and grain pressure are better in wood.

2. Douglas pine no matter what type of dyeing treatment is acceptable. Especially in the surface of Douglas pine transparent paint, varnish, transparent paint, paint or wax, and even some bright or soft color paint can be dyed. Of course, in order to make the surface effect of Douglas pine better, the water content of wood should be controlled well, and it is better to keep it between 12% and 15%. Of course, the closer you get to conventional humidity, the better.

3. The color and texture of Douglas pine are better in wood, its color is rose, and the texture is straight. The color of Douglas pine irradiated in the sun will darken. The ductile fiber of Douglas pine is not suitable for hand carving or cutting, so it is not necessary to make handicrafts. You can only choose power tools or machine tools to deal with it to make the surface of Douglas pine smooth.

4. The gluing strength of Douglas pine is very high, so it is very suitable to make glued beams of different buildings.

5. Douglas pine wood is widely used in daily life, especially in door frames, window frames, wood lines, cabinets and some woodworking products. In addition, Douglas Pine wood has high strength and hardness, which not only increases the durability, but also has the advantage of low price.

Second, what grades can Douglas pine be divided into?

The evaluation and registration of Douglas pine is generally evaluated in the application of construction or secondary processing industry. If it is classified according to foreign grade standards, the wood of Douglas fir can be divided into the following three types:

First, there are no defects and no scars, mainly divided into two or more defect-free materials, third-grade defect-free materials and fourth-grade defect-free materials.

Second, if it is graded according to the processing materials, it can be divided into top processing board, sub-top processing board, first-class and above processing wood, wood strip An and B.

According to the building use, it can be divided into light frame material, light structural frame material, structural fence and plate.