The price of building timber varies with the material and thickness. At present, the timbers used for construction include: Australian pine, radial pine, Douglas fir, camphor pine, hemlock, spruce, etc. The main factors affecting the quality of building timber are pests, cracks, decay and deformation. Building timbers have different effects in different environments. They are easy to crack in dry environments and are easy to be corroded in wet environments.

There will inevitably be humid, hot and cold environment in the construction, which has a great impact on the timber. At present, steel back ridge is widely used to replace wood back ridge. It is the general trend for building timber to be replaced by steel back ridge. More and more enterprises are using steel back ridge.

Characteristics of steel back ridge

1. Safe, reliable, simple and efficient. Square steel keel is more rigid, stable and reliable than wooden square keel; Square steel is used, with uniform section, simple and convenient construction and high efficiency.

2. There are many times of turnover, less amortization costs and significant comprehensive economic benefits. The square steel replaces the wooden square, and changes the low-value consumables in the project into the revolving materials, which can be used more than 300 times.

3. Light weight, small size, easy to transport. The square steel keel is small in size, light in weight, convenient for short distance and long distance transportation, and can be used for cross-site project turnover.

4. It occupies a small construction site and has obvious advantages for projects with a narrow construction site.

5. The components are standardized and modular, the square steel pipe specification is unified, simple and reliable, and the installation speed is fast. It is not only applicable to the construction of shear wall structure, but also applicable to the construction of frame columns, beams, and slabs.

6. While improving the construction quality, it ensures the cleanness of the construction site and lays the foundation for civilized construction.

7. It is not affected by environmental conditions and the construction period is guaranteed.

8. Energy conservation and environmental protection. Save wood and protect limited forest resources; Reduce the use of wood, reduce sawdust and reduce air pollution; Save labor and improve work efficiency.

9. After the square steel replaces the wooden square as the secondary keel, the structural stress performance is good, and the phenomenon of unauthorized pulling and sawing is avoided from the source.