What are the precautions for rigging in hoisting works?
The load weight shall not exceed the limit load of sling, sling should be used before the use of visual inspection, and according to the spreader lifting load check the working load limit, meet the requirements before use.
The sling shall not be allowed to repair or reprocess itself (welding, heating, heat treatment, surface chemical treatment). If such treatment must be carried out, it shall be sent back to the original manufacturer or under the guidance of the experts of the original factory.
When lifting heavy objects, heavy is prohibited to stand.
1. develop good hoisting habits and plan how to hang, lift and unload before lifting.2. prepare: determine the weight of the hanging object and its center of gravity, read the attached document carefully, mark the lifting point and weight data. Only when the center of gravity has been determined can the hook be hung at the right place!3. the crane operator shall be informed of the weight of the suspended object.4. the crane hook shall be hung vertically above the center of gravity of the suspended object.5. lifting heavy pieces, both to avoid damage to lifting objects, but also to prevent damage to the rigging itself. The following conditions shall be observed in order to avoid rotation or fall:(a) single leg rigging, the lifting point shall be perpendicular to the center of gravity of the lifting object.(b) if it is a two leg rigging, the suspension point shall be on either side of the lifting object, with the lifting point above the center of gravity.(c) if it is a three leg and four leg rigging, the suspension point shall be evenly located at the center of gravity of the lifting object, and above the center of gravity of the suspended object.Attention must be paid to the lifting angle, between the vertical and the leg): the greater the lifting angle, the smaller the lifting capacity. Lifting angles of more than 60 degrees are absolutely not allowed!
