Best Practices for Using Crane Lifting Belts

Crane lifting belts, also known as duplex webbing slings, are characterized by their light weight and high safety factor. During hoisting operations, they provide a wide and smooth bearing surface, which minimizes the risk of leaving noticeable marks on the lifted objects. Additionally, they are suitable for environments where the surface of the lifted objects requires strict protection.

1. When using two or more eye and eye webbing slings, ensure that the slings inside the hook do not overlap or press against each other. The center of the resultant force on each sling should align with the center of force on the hook.

2. When using duplex webbing slings, they should not be looped around the hook for tying; they should not be hung on the hook's tip.

3. During hoisting operations, crane lifting belts should not be crossed or twisted, nor should they be knotted or twisted. Properly use specialized sling connectors, such as shackles, for the connection.

4. Avoid multi-layer wrapping and overlapping usage.

5. When lifting cargo with sharp corners or edges, protective covers or corners must be used to protect the slings, thereby extending their service life. Slings should never be used on rough surfaces to prevent them from being cut by sharp edges or scratched by rough surfaces.

6. When using eye and eye slings, the bending part of the hook causes the sling to not uniformly bear the load across its width, influenced by the hook's inner diameter. If the hook diameter is too small, it does not fully engage with the sling's eye loop. Proper connectors should be used for the connection.

7. Prevent high temperatures:

   Regular polyester webbing slings should not be used at temperatures exceeding 100°C. Aramid fire-resistant slings should not be used at temperatures exceeding 180°C. Be aware of the high temperatures caused by instantaneous friction, as it can burn the webbing slings.

8. The relationship between the lifting eye, hook, and sling soft loop: If the hook or bearing shaft is too large and the soft loop of the sling is too small, it can cause the stitching of the soft loop to tear, affecting the load and potentially leading to safety incidents.

9. Hooking considerations: If not hung at the center of the hook, it may cause the sling to slide into the hook's lower part due to friction when under load, damaging the sling. Alternatively, the sling may not slide into the hook's lower part, causing the hook's tip to bear the load and deform the hook.