1、 Application of steel structure bolt
Steel structure bolts are mainly used in steel structure engineering to connect steel plate connection points. Steel structure bolt is a kind of high strength bolt, which is also a kind of standard parts. The fastening performance is better. It is used in steel structure and engineering to make the fastening effect more effective. In general, the steel structure bolts are required to be above grade 8.8, grade 10.9 and grade 12.9, all of which are high-strength steel structure bolts. Sometimes, the bolts on the steel structure do not need electroplating, so it is OK to use the natural color.
2、 Classification of steel structure bolts
Steel structure bolts are divided into torsional shear high-strength bolts and large hexagon high-strength bolts. Large hexagon high-strength bolts belong to the high-strength level of ordinary screws, while torsional shear high-strength bolts are the improved type of large hexagon high-strength bolts for better construction
3、 Steel structure bolt construction
The construction of steel structure bolts must be initially tightened before final tightening. The impact electric wrench or torque adjustable electric wrench is required for the initial tightening of steel structure bolts; There are strict requirements for the final tightening of steel structural bolts. The final tightening of steel structural bolts with torsional shear must use the torsional shear electric wrench, and the final tightening of steel structural bolts with torsional shear must use the torque electric wrench
4、 Characteristics of steel structure
Compared with reinforced concrete structure, steel structure system has the comprehensive advantages of light weight, factory manufacturing, fast installation, short construction period, good seismic performance, fast investment recovery, less environmental pollution and high degree of industrialization. In the world, especially in developed countries and regions, steel structure is widely used in various engineering construction, such as steel bridge, steel plant, steel gate, various large pipeline vessels, high-rise buildings and tower rail mechanism. Steel structure installation process
1. According to the normal installation sequence and process requirements, the prefabrication and assembly of steel structure on the steel platform must ensure the welding quality.
2. The distance between the splicing joints of flange plate and web plate of section steel shall be greater than 200 mm. The splicing length of flange plate shall not be less than 2 times of plate width; The width of web splicing shall not be less than 300 mm and the length shall not be less than 600 mm.
3. In order to facilitate the welding and ensure the welding quality, the stiffener plate, connecting plate, base plate and cantilever beam on the column and beam shall be assembled and welded on the ground steel platform according to the size of the construction drawing.
4. In addition to the fabrication and assembly of prefabricated steel members on the steel platform according to the requirements of construction drawings and specifications, the site installation process and the change of installation size should also be considered.
Company main business: steel structure nut steel structure bolt high strength nut high strength bolt special shaped nut special shaped bolt
