Bolt Connection Quality Steel structure warehouse building

A joint of high strength bolt, we should start the installation of central bolt group, tighten them one by one, each twist again all marks used different colors of paint to, prevent twist missing. High strength bolts fastening sequence start from parts with large stiffness to untrammelled free end, from the centre to the periphery, so that tightening the plates.

To make ordinary bolt connection joint to receive strength evenly in the bolt, the bolt fastening order should be started, intermediate symmetric to the sides; For large joint should be used after twist, guarantee each bolt to the uniform stress in the joint.
Before construction to deal with large hexagon head bolts, torsion shear type bolt torque coefficient of the fastening force and friction surface slip resistance coefficient of the reinspection, qualified rear can construction.