For a 4-legged chain sling bridle, the Working Load Limit is based on how many of the sling legs?

In the context of a 4-legged chain sling bridle, the Working Load Limit (WLL) is determined based on the load supported by only two of the sling legs. This is due to the way load distribution and tension are managed in a bridle configuration.

When lifting with a 4-legged sling, not all legs are expected to carry an equal amount of the load, especially in scenarios where the load might be unevenly distributed or where some legs may not be as effectively aligned due to angles or positioning. The factors such as sling angles and the actual path of the load can influence how weight is shared among the legs.

Using only two legs to determine the WLL ensures a safety factor is employed, allowing for a practical approach that considers potential variations in load sharing and maintains safety standards during lifting operations. This simplifies the calculation for safe lifting while still considering the dynamics and behavior of the sling under load.

Therefore, the WLL is conservatively linked to the capacity of two sling legs, making it a reliable and safe guideline for rigging practices.