What is the formula for calculating the Working Load Limit (WLL) of a sling or choker?

The Working Load Limit (WLL) of a sling or choker is calculated using the formula that takes into account the diameter of the sling, which is represented by "d" in the equation. In this specific case, the formula is accurately expressed as WLL = d² x 8. This means that you square the diameter of the sling (in inches) and then multiply that result by 8 to determine the safe working load in pounds.

This formula is grounded in the engineering standards that govern lifting equipment, ensuring that the slings can safely support the load up to the calculated limit without risking failure or accident. Using the correct factor, like 8 in this case, is critical for safety and operational efficiency, as it provides a reliable threshold below which the material can handle the tension or weight without undue stress.

The other values such as multiplying by 10, 5, or 12 do not conform to the established standards for calculating WLL for slings and chokers, critical for ensuring safe use in rigging and lifting applications. Therefore, knowing the correct multiplier, which in this case is 8, is essential for anyone working with such equipment to prevent overloading and ensure safety on the job.