What is the main purpose of tag lines during a lift?

The main purpose of tag lines during a lift is to control the load. Tag lines are long ropes attached to a load that help guide and stabilize it while it is being lifted or moved. They allow riggers to maintain better control over the load's position and orientation, especially in situations where the load might swing or rotate due to wind or other forces.

By using tag lines, riggers can prevent uncontrolled movements that could result in accidents or damage. This is particularly crucial when working in tight spaces or near other equipment and personnel. While measuring the load, increasing its capacity, and securing it are all important aspects of rigging, the primary function of tag lines is to provide the necessary control to ensure safe handling during lifting operations.