Under what circumstances is a load test typically necessary?

A load test is essential to verify that a crane can safely handle its rated load and operates within safety standards. This testing is particularly crucial for new cranes, as it ensures that they function correctly and are free from manufacturing defects. Additionally, after major repairs, a load test helps confirm that the crane's mechanical integrity has been restored and that all repairs have been effectively implemented.

In the case of new cranes, the load test serves as an assurance that the crane meets all necessary safety and operational regulations before being put into service. Major repairs require a similar assessment because they may affect the crane's structural integrity, lifting mechanisms, or overall functionality.

Conducting a load test under these circumstances promotes safety for both the operators and any personnel working in proximity to the crane. The other scenarios provided do not meet the same rigorous standards or the necessity mandated for ensuring operational safety.