For what purpose are trolleys primarily used in rigging?

Trolleys are primarily used in rigging to support lever or chain type hoists, providing a means to relocate loads along a horizontal plane. This is essential in various applications where items need to be moved from one location to another while being hoisted. The design of a trolley allows for smooth movement along beams or tracks, enabling effective lifting and positioning of loads with optimal stability.

In contrast to other options, while trolleys can contribute to load efficiency, hoisting, and cable tensioning, their main function in a rigging setup lies in supporting and allowing the movement of hoists, facilitating lifting operations and enhancing the overall efficiency of load management. Ultimately, this capability is crucial in various industrial and construction settings, where precision and control of lifted materials are paramount.