Since slings typically handle loads in lashing straps less than optimal conditions and in combination with equipment of varying ages, strict caution should always be exercised during their use. Adherence to a wide range of general operating practices can ensure secure lifts and reduce the possibility of sling injury.Overall, the load weight should always be within the sling’s rated capacity, with sling angles of 45 degrees or less and shock load should be avoided. Any sharp corners in contact with the sling should be padded, as failure to do so will allow the edges of the sling to be cut.Slings must not be shortened or extended by knotting, twisting or wire rope clips unless such action is authorised by the manufacturer.

When slings are stored, you should always select an area that is not subject to mechanical damage, corrosive action, dampness or excessive temperatures.Known for their great strength and flexibility, the wire rope slings don’t wear as quickly as any other kind. Core, wire, and strand are the three components of the wire rope sling.The core serves as a foundation that holds the sling together and is either made up of fibre, wire or an independent wire rope, which is the strongest option.

The wires are usually made of carbon steel and laid helically around the core to form a strand. Usually, 16 to 26 wires consist of a line, with six strands rotated in a clockwise direction to form a wire loop.Each rope throughout its use is subject to fatigue due to bending stress. In order to prevent fatigue, the wires must constantly bend under tension, as when the rope passes over the sheave, without displaying signs of wear or deformation.A rope made of several wires would have a higher resistance to fatigue than a rope of similar size made of fewer, larger wires because smaller wires bend more quickly when a rope passes over sheaves or drums.

Since wire rope slings gradually lose strength due to natural causes, operators and riggers have to determine the rope’s safe working load before use. It is done by dividing the braking power of the rope by five, which creates a safety margin when new rigging equipment is used.The daily pre-use inspection of the ropes is of the upmost importance, with the person using the sling being responsible for the visual examination. Such a person should initially look for damaged wires, severe localised abrasions, scraping, and malformed end attachments. Also noteworthy are kinking, corrosion or other damage resulting in permanent distortion of the rope, the rope being removed from service due to such wear.