14.5.4 Gripping Force

Multi-leg slings exert a gripping or clamping force on the load which increases as the included angle between the legs is increased. (See Figure 14.5.4-1 ) The magnitude of this gripping force must be taken into account, bearing in mind the nature of the load to be lifted.

This force is much increased in the type of sling where the lower terminal fittings are threaded on a loop of chain (e.g. case/drum slings) and so the maximum included angle between the parts of chain in this type of application should not exceed 60°. (See Figure 14.5.4-2 )