On what basis are most jib capacities determined?

Most jib capacities are determined based on structural integrity. This considers the design and materials used in the jib, which must be able to withstand the forces and loads imposed during operation without failing. The structural integrity takes into account factors such as the strength of the materials, the geometry of the jib, and the load distribution. This ensures that the jib can safely support the intended loads while maintaining stability and preventing deformation or structural damage.

Manufacturer recommendations, safety ratings, and weight limits of the crane play important roles in overall crane operation and safety, but the fundamental basis for determining jib capacities specifically relies on how well the jib's structure can handle loads without compromising its integrity. This focus on structural integrity helps ensure safe lifting practices and the longevity of equipment.