Why might a spreader bar be used in rigging?

A spreader bar is primarily designed to maintain load stability through weight redistribution. When lifting loads that have a wide or uneven shape, using a spreader bar can help distribute the weight more evenly across the rigging points. This stabilization is critical as it reduces the risk of the load tipping or shifting during the lift, which can lead to accidents or equipment failure.

By using a spreader bar, the rigging configuration can achieve a more balanced load, promoting safety and efficiency. The bar effectively reduces the stress on any single rigging point and allows for a more controlled lift. This aspect is particularly important in various lifting scenarios, such as handling large sheets or bundles where maintaining the center of gravity is vital for safe operations.

In contrast, while a spreader bar may have secondary effects that could relate to other options, such as potentially allowing for quicker setups or helping with load capacity indirectly by increasing stability, its primary and most direct function is to ensure that loads are lifted in a stable and secure manner.