1. The command personnel of lifting and lifting must be on duty with a certificate. During operation, they should closely cooperate with the crane driver to execute the specified command signals. The driver should obey the command, when the signal is not clear or wrong, the driver can refuse to carry out.

2. Assign special persons to be responsible for safety supervision during hoisting.

3. A truss of roof must be soldered firmly and connected firmly with the wind column before the hook can be loosened.

4. Hoisting must be carried out according to the requirements

5. The support between the rack and the skylight must be fixed before the roof board can be lifted.

6. The hook can only be loosened after welding and fixing the roof board on the window frame.

7. Avoid collision with surrounding scaffolds when the frame and above components are hoisted.

8. The alignment of the girder must be fastened on the pillar with no. 8 wire double strand or wire rope as the lifeline, and the safety belt should be covered before the alignment welding.

9. Repair welding of hoist hooks and rings is strictly prohibited. The lifting hook and the lifting ring should be replaced when there are cracks on the surface, serious wear or permanent deformation of the dangerous section.