According to ASME B30.5, what is the maximum allowable increase in the throat opening of a crane hook?

The correct maximum allowable increase in the throat opening of a crane hook, according to ASME B30.5, is indeed 5%. This standard is essential for ensuring the safety and integrity of lifting operations. Over time, crane hooks may experience wear and deformation due to factors like the weight of loads, environmental conditions, and repeated usage.

Allowing an increase in the throat opening provides a margin for hook wear; however, it is critical not to exceed this limit to maintain the mechanical strength and load-carrying capacity of the hook. Exceeding the specified 5% could compromise the safety and function of the hook, leading to failures during lifting tasks. Thus, adhering to this standard helps ensure safety for operators and equipment alike.