If an operator lifts with an offset jib, what happens to the crane's capacity?

When an operator lifts with an offset jib, the crane's capacity is generally reduced. This reduction occurs because extending the jib alters the crane's center of gravity and increases the leverage that the load has on the lifting mechanism. The offset position places more weight farther away from the crane's axis, which can lead to a decrease in stability and lifting capability.

In crane operations, understanding how various configurations affect capacity is crucial for maintaining safety and operational effectiveness. When the offset jib is extended at an angle, the load is not only further away but also elevates the top structure's component forces, which can potentially lead to tipping if capacities are exceeded. Therefore, operators must always consult load charts that reflect the operational scenarios of using an offset jib to ensure safe lifting practices.