The purpose and construction precautions of steel structural bolts

The purpose and construction precautions of steel structural bolts

The main uses of steel structural bolts are:

1、 The steel structure bolt is used in the steel structural engineering project to connect the node of thick steel plate of steel structure. It is a high toughness bolt and also a type of standard component. The tightening characteristics are relatively good, used in steel structures and engineering projects to enhance the tightening effect. On general steel structures, the specified steel structural bolts are all grade 8.8 or above, and there are also grades 10.9 and 12.9, all of which are high toughness steel structural bolts. Sometimes, the bolts on steel structures do not require electroplating technology and can be used in the original color

2、 Steel structural bolts are divided into torsional shear type high-strength bolts and large hexagonal head high-strength bolts. Large hexagonal high-strength bolts belong to the high toughness level of general screws, while torsional shear type high-strength bolts are an improved version of large hexagonal high-strength bolts for stronger engineering construction.

Common problems in the construction of steel structure bolts: The construction of steel structure bolts must first be initially tightened and then finally tightened. The initial tightening of steel structure bolts requires the use of impact type electric wrenches or torque adjustable electric wrenches; And there are strict regulations for final tightening of steel structural bolts. Final tightening of torsion shear type steel structural bolts must use torsion shear type electric wrenches, and final tightening torque type steel structural bolts must use torque type electric wrenches The large hexagonal steel structural bolt consists of one bolt, one nut, and two washers. The torsion shear steel structural bolt consists of one bolt, one nut, and one washer.