Sling is a connecting piece used in conjunction with electric hoists, which can generally be divided into metal sling and synthetic fiber sling. Metal slings mainly include wire rope slings, lifting belt slings, chain slings, shackles, hooks, lifting pliers, etc. There are two main types of synthetic fiber rigging: rope and belt. Attention should be paid to the use of chain slings:

　　1. If it is a two legged rigging, the lifting points should be located on both sides of the lifting object, and the lifting point should be above the center of gravity.

　　2. Chains are not allowed to be knotted or twisted during use.

　　3. The working humidity range should be between -40 ° C and 200 ° C.

　　4. Do not load with the tip of the hook.

　　5. The lifting point of a single leg rigging should be vertically above the center of gravity of the lifting object.

　　Attention should be paid to the use of wire rope slings: whether it is a single leg, double leg, three leg, or four leg lifting, the lifting points should be evenly located on the plane around the cargo, and the hook should be directly above the center of gravity of the lifted object. Attention should be paid to the use of lifting straps and rigging:

　　1. The safety factor is 4:1, specifically 5:1 or 6:1, and should be used within the safety factor range.

　　2. The lifting strap in the complete set of rigging is damaged and cannot be used again.

　　3. Attention should be paid to the relationship between the included angle and the bearing tonnage during use.

　　4. Avoid shock or vibration loads.