What effect does a choker hitch around a round load have on the SWL for a wire rope sling?

The relationship between a choker hitch and the safe working load (SWL) or working load limit (WLL) of a wire rope sling is significant. When a choker hitch is used around a round load, it introduces a bend in the sling which effectively reduces its capacity. Specifically, the formation of a choker hitch creates additional stress points in the sling, which can compromise its strength.

Research and guidelines from rigging and lifting standards indicate that using a choker hitch typically reduces the SWL/WLL of the sling by 25%. This is due to the nature of the bend and the angle at which the load is pulled. The added stress at the pinch point of the choker can lead to a reduction in the sling's effective load-bearing capacity.

Therefore, in this scenario, selecting the option that states the SWL/WLL is reduced by 25% accurately reflects the industry standards and practices regarding choker hitches and their impact on lifting equipment. Understanding this aspect enhances safety and ensures that lifting operations are conducted within safe limits.