Dapeng Town Industrial Park, Tongshan District, Xuzhou City, Jiangsu Province, China
The tightness of high strength bolts must be carried out twice. The first time is the initial twisting: the initial tightening to 60%~ 80%of the standard axial force (that is, the design preparatory). The second tightening is the final twist, and the high -strength bolt of twist -cutting type should be twisted off.
After a hanging, a construction section is completed. The steel structure forms a stable framework unit and starts installing high -strength bolts.
The steel structure bolts are in the direction of convenience, and each node should be neat and consistent. After entering the high -intensity bolt, the temporary bolt is removed after being tightened with a wrench, and the temporary bolt is removed to replace it with high -strength bolts.
When the twist -cut high -strength bolt is installed, pay attention to the direction: the cushion of the bolt is staffled on the side of the nut, and the side of the pads has a backward angle to contact the nut.
The bolt that is completed at the initial twist should be marked for confirmation. To prevent the leakage, the high -strength bolt installed on the day should be completed on the same day.
The initial twist and final twist should be tightened from the middle of the bolt group to the symmetrical diffusion.
The twist -cut high strength bolt should be completely twisted at the tail plum blossom head to end the final twist, and the omissions are not allowed.
Due to the narrow space, the high strength space frame bolt panel should not operate the part, it can be installed with a high sleeve or a manual wrench.
