Centering the hook over the center of gravity of the load helps prevent load swing.

• A. True
• B. False
• C. It increases swing
• D. It has no effect

Answer: (A)

Centering the hook over the load's center of gravity keeps the lifting force aligned with the weight's balance point. When the hook is directly above the CG, the lifting force acts vertically through the weight, producing minimal horizontal torque. This reduces the load’s tendency to rotate or swing and helps keep it steady as the crane starts, moves, or stops. If the hook is off-center, the lift creates a moment about the CG, which drives swing like a pendulum. In practice, riggers aim to pass the lift line through the load’s CG and, for irregular loads, rebalance with additional slings or use tag lines to control sway.