inspection and turnover of all slings and rigging gear
during the BEEP.
Wire rope slings require special attention due to
being subjected to severe wear, abrasion, impact
loading, crushing, kinking, and overloading. Failure
to provide blocking or protective pads permits sharp
corners to cut into the sling. Pulling slings from
under loads results in abrasion and kinking. Dropping
loads on slings or running equipment over slings will
cause crushing. Sudden starts and stops when lifting
loads will increase stress on the sling. The recom-
mended factor of safety for wire rope slings is 5:1 due
to the severe service expended on slings, errors made
in determining load weights, and the effects of sling
stress from sling angles (fig. 3-20).
The single-vertical hitch (fig. 3-21) is a sling that
supports a load by a single vertical part or leg of the
Figure 3-21.-Single-vertical hitch.
Figure 3-20.-Sling stress.