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Working Load Limit
Similar Terms: WLL,SWL
The Working Load Limit (WLL) is the maximum load which should ever be applied to the product under any condition. The Working Load Limit is based on a load being uniformly applied in a straight Line pull.
Safe Working Load (SWL) refers to the mass or force that a piece of lifting equipment can safely use to lift, suspend, or lower a mass without fear of breaking. A Safe Working Load can be 25 - 50% of the >Breaking Strain (BS), but will depend on the usage and the standard required.
It is the responsibility of the ultimate user to determine a Working Load Limit for each application.
Many factors should be considered: included among, but not limited to, loads applied, speed of operation, acceleration or deceleration, length of Rope or cable, shock loads, abrasion, corrosion, number, size, condition and location of drums and sheaves, facilities for inspections, and the danger to life and property should a Rope or cable break.
See also Maximum Working Load (MWL).
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