For how long must a proof test load be suspended during personnel hoisting?

The correct duration for suspending a proof test load during personnel hoisting is at least 5 minutes. The five-minute time frame is established as a standard to ensure that the lifting equipment and rigging gear have sufficient time to stabilize under load. This duration allows for identification of any potential failures or issues that could arise when the equipment is under stress.

Suspending the load for this period permits thorough monitoring of the system's performance and ensures that all components are functioning properly before any personnel is hoisted. Additionally, this time helps to observe if there are any signs of deformation, excessive movement, or abnormal sounds that might indicate a problem with the rigging, hoisting equipment, or the load itself.

By adhering to the five-minute requirement, safety is prioritized, minimizing the risk of accidents or equipment failure during personnel lifting operations. This practice is critical to ensure the reliability and integrity of the rigging system before it is used for worker transport.