Application and construction precautions of steel structure bolt

Main purpose of steel structure bolt:

       I. the steel structure bolts are used in the steel structure project to connect the thick steel plate joints of the steel structure. It is a kind of high toughness bolt and also a kind of standard part. The tightening performance is better, which is used in steel structure and engineering project to make the tightening effect. In general, the specified steel structure bolts are all above grade 8.8, and there are also grade 10.9 and grade 12.9, all of which are high toughness steel structure bolts. Sometimes, the bolts on the steel structure do not need electroplating process, and they can be made with primary color

       II、 The steel structure bolt is divided into high-strength bolt of torsion shear type and high-strength bolt of large hexagon head. The high-strength bolt of large hexagon belongs to the high toughness level of general screws, while the high-strength bolt of torsion shear type is an improved version of the high-strength bolt of large hexagon for stronger engineering construction.

       Common problems in the construction of steel structure bolts: the steel structure bolts shall be tightened first and then tightened finally, and the impact type electric wrench or adjustable torque type electric wrench shall be used for the initial tightening of steel structure bolts; however, there are strict regulations for the final tightening of steel structure bolts, and the torsional type electric wrench shall be used for the final tightening of torsional shear type steel structure bolts, The torque type electric wrench must be used for the final tightening of the torque type steel structure bolt. The large hexagon angle steel structure bolt consists of one bolt, one nut and two washers. The torsional shear steel structure bolt consists of a bolt, a nut and a washer.  

       Pay attention to Ningbo Shengdu fastener Technology Co., Ltd. and learn more fastener product knowledge!