Why is it important to ensure the crane hook is above the centre of gravity of a load to be lifted?

Why is it important to ensure the crane hook is above the centre of gravity of a load to be lifted?

• A. To maximize the lifting speed
• B. To avoid dragging or snigging the load
• C. To minimize setup time
• D. To reduce wear on the hook

Answer: (B)

The lift’s stability comes from how the load’s weight acts relative to the hook. When the crane hook is above the load’s center of gravity, the weight pulls straight down from a point high above the CG, so the load naturally hangs with little tendency to tilt. That stable, vertical hang keeps the load from rotating or settling against surfaces, which means it’s less likely to drag along the ground or snag as you lift. If the lift point weren’t above the CG, the weight would create a tipping moment that can cause rotation or dragging, increasing the risk of snigging.

The lift’s stability comes from how the load’s weight acts relative to the hook. When the crane hook is above the load’s center of gravity, the weight pulls straight down from a point high above the CG, so the load naturally hangs with little tendency to tilt. That stable, vertical hang keeps the load from rotating or settling against surfaces, which means it’s less likely to drag along the ground or snag as you lift. If the lift point weren’t above the CG, the weight would create a tipping moment that can cause rotation or dragging, increasing the risk of snigging.