When the load radius falls between capacities listed in the load chart, which capacity should be used?

When determining the capacity of a crane when the load radius falls between the capacities listed in the load chart, it is essential to use the gross capacity for the longer radius. This approach is based on the principle that as the load radius increases, the crane’s lifting capacity typically decreases. The load chart reflects this relationship, indicating that for any given crane configuration, the capacity at a shorter radius will always be higher than that at a longer radius. Using the gross capacity for the longer radius ensures that the crane operates within safe limits, prevents possible overloads, and complies with performance specifications outlined in the load chart.

This practice helps protect both the integrity of the crane and the safety of personnel working on site. By selecting the capacity corresponding to the longer radius, operators minimize risks associated with lifting loads at a distance that could jeopardize the crane's stability or performance. It is vital for crane operators to adhere strictly to these guidelines to maintain operational safety and efficiency.