Basic requirements for installation of steel structure bolts
Machining of bolt holes: Bolt holes should be machined in the factory, with accurate hole positions and arranged in rows.
video
Temporary fixation: Install bolts or rivets on site for temporary fixation. The installation bolts should be evenly arranged, and the number should not be less than 1/3 of the total number of bolts and not less than 2.
Bolt penetration direction: The direction of bolt penetration needs to be carried out according to the requirements, and the nodes must be kept neat.
Tightening method: The tightening method includes initial tightening and final tightening. The initial tightening needs to be tightened to 60% to 80% of the standard axial force of the bolt, and the final tightening needs to unscrew the plum blossom clip.
Specific steps for installing steel structure bolts
Initial tightening: The initial tightening needs to be tightened to 60% to 80% of the standard axial force of the bolt and marked for identification.
Final tightening: The final tightening needs to be completed on the same day, and the twist shear high-strength bolt needs to have the plum blossom clamp removed.
Marking: After the initial tightening is completed, it is necessary to mark the bolt for identification and to prevent missed tightening.