Introduction to the types and parameters of steel structural bolts

Introduction to the types and parameters of steel structural bolts

Steel structural bolts are a type of bolt with high strength, also known as high-strength bolts or high-strength bolt connection pairs. It is a completely new form of connection that has developed since the 1950s. The use of steel structure bolt connections has the advantages of convenient construction, good stress performance, and being detachable, fatigue resistant, and not loosening under dynamic loads. It is a very promising connection method.

Steel structural bolts are high-strength bolts and are also a type of standard component. The fastening performance is relatively good, used in steel structures and engineering, to enhance the fastening effect. On general steel structures, the required steel structural bolts are grade 8.8 or above, as well as grade 10.9 and 12.9, all of which are high-strength steel structural bolts. Sometimes, the bolts on steel structures do not need to be electroplated, and it is OK to use the natural color.

When installing steel structural bolts, the torque wrench should tighten the nut, which causes the steel structural bolts to generate a very large and controllable pre tension force. The same amount of friction force is generated on the pre connected parts through nuts and lining plates. Under the action of pre tension, a relatively large friction force is generated along the surface of the connected parts. Obviously, as long as the sliding force is less than the friction force, the parts will not be sliding. This is the realization of the connection principle of steel structural bolts.