22.5.2 Type (2)

Clamps should have been tested to a proof load of twice the working load limit. The proof load should be applied at the angle(s) between the legs of the sling at which the maximum stress(es) occur in the clamps, without showing permanent deformation. In samples tested to destruction, they should not have released the load at less than three times the working load limit.

The provision of handles on the heavier clamps aids handling and prevents pinched hands.

This type of clamp may not be suitable where there is a tendency for the plate to sag when lifted. In this context, it should be noted that clamps designed for use on an endless loop usually exert a greater crushing force which aggravates the problem.