INTRODUCTION Slings are the most common method of connecting a load to the hook of a crane or hoist. Various types of slings may be utilized, based on the specific requirements or conditions of a particular lifting operation. A sling may be constructed of wire rope, chain, metal mesh, fiber rope, or synthetic fibers. The expected force on a sling must be determined before selecting the size and type of sling to ensure that it is not overloaded. Various types of hitches can be used to attach a sling to a load. Some reduce the rated load of the slings. However, they have certain advantages, such as helping to maintain control of a load.
OBJECTIVES • List and describe the various materials and configurations used to construct slings. • Differentiate between the rated load, breaking strength, and safety factor of a sling. • List the types of information typically included on sling identification tags. • Describe various types of sling hitches and their advantages and disadvantages. • Calculate a sling load based on load weight and rigging arrangement.
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