This is the chart of calculations using the working load limit calculation formula: WLL = Breaking Strength / Safety Factor. Chain Sling: With a breaking strength of 20,000 lbs and a safety factor of 4, the WLL is calculated as 5,000 lbs. This is a typical safety factor for chain slings.

Formula for calculating WLL using Minimum Breaking Load (MBL) and Design Factor. How Is WLL Determined? WLL is calculated based on the Minimum Breaking Load (MBL) of the equipment.

Working Load Limit (WLL) is the maximum weight or load that a piece of equipment, such as a crane, hoist, or rigging, can safely handle. It represents the threshold beyond which the equipment’s structural integrity might be compromised, leading to potentially catastrophic failures.

Jul 28, 2023 · In the formula form: SWL = MBS / Safety Factor. SWL aims to ensure safety in operations that involve lifting heavy objects.

Jul 31, 2023 · First, determine the design load limit (N). Next, determine the safety factor. Next, gather the formula from above = WLL = DLL / SF. Finally, calculate the Working Load Limit. After inserting the variables and calculating the result, check your answer with the calculator above.

Jun 21, 2019 · Working Load Limit (WLL), which is the maximum working load designed by the manufacturer. This load represents a force that is much less than that required to make the lifting equipment fail or yield. The WLL is calculated by dividing MBL by a safety factor (SF).

Aug 4, 2015 · SWL or WLL are calculated by dividing MBL by a safety factor (SF). An example of this would be a chain that has a MBL of 2000 lbf (8.89 kN) would have a SWL or WLL of 400 lbf (1.78 kN) if a safety factor of 5 (5:1, 5 to 1, or 1/5) is used.

Oct 3, 2024 · The working load limit (WLL) is calculated using this formula: \[ WLL = \frac{DLL}{SF} \] where: WLL: Working Load Limit (N), DLL: Design Load Limit (N), SF: Safety Factor. Example Calculation. If you have a design load limit of 1200 N and a safety factor of 4, the working load limit is calculated as: \[ WLL = \frac{1200}{4} = 300 \text{ N ...

Sep 20, 2024 · However, you may also calculate the WLL using the following formula: WLL = MBLSafety Factor. The MBL represents the absolute maximum weight the equipment can handle before breaking. However, because of safety considerations, the WLL will always be …

WLL: Maximum load that the non-fixed lifting attachment is designed to lift under the conditions specified by the manufacturer. SWL: Formerly a common term but has today been replaced by WLL for all lifting equipment under the crane hook. The term is …