Application characteristics of steel structural bolts

Application characteristics of steel structural bolts

The full name of steel structural bolts is the steel structural bolt connection pair, usually not referred to as high-strength bolts. Steel structural bolts are mainly used for the construction of industrial and civil buildings, railway bridges, highway bridges, pipeline bridges, tower and mast structures, boiler frames, boiler steel structures, large-span industrial factories, high-rise civil buildings, various towers, light steel structures, lifting machinery, and other steel structures connecting buildings.

Each connection pair includes a bolt, a nut, and two washers. According to the installation characteristics, steel structural bolts are divided into large hexagonal head bolts and torsional shear type bolts. The production cost of high-strength shear bolt joints is higher than that of hexagonal bolts. When assembling high-strength torsional shear type bolts for connection alignment, the side of the nut with a circular countertop should face the chamfer of the washer; The high-strength torsion shear bolt connection pair used for steel structures is an improved version of the large hexagonal bolt connection pair used for steel structures, with the main advantage that its structure is simpler than hexagonal bolts. Due to the small construction space required, it is safe to use an electric wrench to directly unscrew the circular head at the tail, making the operation simple and fast, and checking the construction quality very convenient. It does not require professional personnel or equipment. Only by visual inspection to confirm that the plum blossom head has been tightened can construction quality be guaranteed.

Each pair of twisted shear bolt connections to GB/t3632 includes one bolt, one nut, and one washer. When assembling large hexagonal steel structure bolts for connection, the side with chamfer below the bolt head washer should face the bolt head; When constructing large hexagonal high-strength bolts, a torque wrench is required, which requires a large operating space and should be completed in two parts: initial tightening and final tightening. The structure of torsion shear bolts is quite complicated. Quality inspection also requires torque inspection, which requires professional equipment and quality inspection personnel.