According to ASME B30.2, the maximum twist of the hook cannot exceed what degree?

The correct answer is that the maximum twist of the hook, according to ASME B30.2, cannot exceed 10 degrees. This specification is crucial because excessive twisting can compromise the integrity of the hook and lead to potential failure while lifting loads. Over time, an angular deviation greater than 10 degrees can create stress concentrations and reduce the hook's ability to safely hold and manipulate loads.

The standard acknowledges that any twist beyond this limit poses significant safety risks, such as slipping, uneven load distribution, and even breakage of the hook in severe cases. By enforcing this guideline, ASME aims to ensure the safe operation of overhead cranes and the protection of both personnel and equipment on the job site. Adhering to this limit helps maintain the reliability of lifting operations and minimizes accidents related to hook failure.