Slings

Equipment Operator Basic - Beginning construction equipment operators manual
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SLINGS Slings are widely used for hoisting and moving heavy loads. Some types of slings come already made. Slings may be made of wire rope, fiber line, or chain. SLINGS AND RIGGING GEAR KITS The NCF has slings and rigging gear in the battalion Table of Allowance to support the rigging operations and the lifting of CESE. The kits 80104, 84003, and 84004 must remain in the custody of the supply officer in the central toolroom (CTR). The designated embarktion staff and the crane test director monitor the condition of the rigging gear. The crane crew supervisor normally has the responsibility to inventory the contents of the kits. The rigging kits must be stored undercover. WIRE ROPE SLINGS Wire rope slings offer advantantges of both strength and flexibility. These qualities make wire rope adequate to meet the requirements of most crane hoisting jobs; therefore, you will use wire rope slings more frequently than fiber line or chain slings. FIBER LlNE SLINGS Fiber line slings are flexible and protect the finished material more than do wire rope sliings. But fiber line slings are not as strong as wire rope or chain slings. Also, fine line is more likely to be damaged by sharp edges on the material being hoisted than wire rope or chain slings. CHAIN SLINGS Figure 13-30.—Endless sling rigged as a choker hitch. Chain slings are frequently used for hoisting heavy steel items, such as rails, pipes, beams, and angles. They are also handy for slinging hot loads and handling loads with sharp edges that might cut the wire rope. USING WIRE ROPE AND FIBER LINE SLINGS Figure 13-31.—Methods of using single-leg slings. Three types of fiber line and wire rope slings commonly used for lifting a loud are the endless, single leg, and bridle slings. An endless sling, usually referred to by the term sling, can be made by splicing the ends of a piece of fiber line or wire rope to form an endless loop. An endless sling is easy to handle and can be used as a choker hitch (fig. 13-30). A single-leg sling, commonly referred to as a strap, can be made by forming a spliced eye in each end of a piece of fiber line or wire rope. Sometimes the ends of a piece oe wire rope are spliced into eyes around thimbles, and one eye is fastened to a hook with a shackle. With this arrangement, the shackle and hook are removable. 13-16

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