According to ASME B30.2, what is the safety factor for rigging?

The correct safety factor for rigging according to ASME B30.2 is indeed 5 to 1. This means that the rigging components, such as slings and hardware, must be able to withstand loads that are five times the maximum expected load. This high safety factor is established to account for various factors including wear and tear, shock loading, and potential flaws in the materials.

A safety factor of 5 to 1 provides a substantial margin for error, ensuring that the rigging can handle unexpected stresses and minimizes the risk of failure during lifting operations. This is crucial in preventing accidents that could lead to injuries or fatalities on the job site. The rationale behind higher safety factors like this is based on the unpredictable nature of loads and environmental conditions that can affect lifting operations.

Lower ratios might not provide enough assurance for safety in the rigging trade, which is why the industry standard adheres to this rule for the protection of personnel and cargo.