Reid Lifting Trolley Rope Control System Product Description Rope Control System for use with Porta-Gantry Our Rope Control System allows precise control over the movement of the load trolley from a safe location next to the A-frame. By utilizing a series of sheaves and a winch a mechanical advantage is added to the system reducing the effort during operations. This system not only adds a method of controlled movement of the load but also removes the need to manually handle the lifted load increasing the safety of the system. Product Document Specifications