inspection and turnover of all slings and rigging gearduring the BEEP.SlingsWire rope slings require special attention due tobeing subjected to severe wear, abrasion, impactloading, crushing, kinking, and overloading. Failureto provide blocking or protective pads permits sharpcorners to cut into the sling. Pulling slings fromunder loads results in abrasion and kinking. Droppingloads on slings or running equipment over slings willcause crushing. Sudden starts and stops when liftingloads will increase stress on the sling. The recom-mended factor of safety for wire rope slings is 5:1 dueto the severe service expended on slings, errors madein determining load weights, and the effects of slingstress from sling angles (fig. 3-20).Single-Vertical HitchThe single-vertical hitch (fig. 3-21) is a sling thatsupports a load by a single vertical part or leg of theFigure 3-21.-Single-vertical hitch.Figure 3-20.-Sling stress.3-22
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