When does an erected jib have its greatest effect on a crane's operation?

The scenario in which an erected jib has its greatest effect on a crane's operation occurs with a long boom at a low boom angle. In this configuration, the jib extends the reach of the crane, allowing it to lift and place loads at greater distances from its center of rotation. A longer boom enhances the crane's leverage, and combined with a low boom angle, the jib effectively reduces the overall center of gravity, which contributes to increased stability during operations.

This configuration allows the crane to handle heavier loads more safely and efficiently over a wider radius without significantly compromising its stability. By extending the jib while keeping the boom low, you can take advantage of the mechanical advantage provided by the crane's design, ensuring that loads can be moved where needed with optimal balance and control.