When are swivel hoist rings required to have their rated load reduced?

Swivel hoist rings are engineered to handle specific loads under certain conditions. When these rings are utilized for angular pulls, it introduces additional stress and forces that the hoist rings must accommodate. Their rated load is primarily calculated based on vertical lifting; when the angle of the pull deviates from vertical, the effective load on the hoist ring increases due to the forces acting at various angles. As the angle deviates, the force can exceed the rated capacity, which necessitates a reduction in the rated load to ensure safety and prevent failure.

This principle is critical in lifting operations where load stability and safety are concerns. Understanding how angular lifts affect load capacities allows for better risk management in operations involving hoist rings.