Where should the load's center of gravity be placed during lifting?

• A. Under the boom tip
• B. Over the center of rotation
• C. At the base of the crane
• D. At the load hook

Answer: (A)

The main idea is to keep the load’s weight aligned with the crane’s lifting point so the lift is straight and stable. Placing the load’s center of gravity directly beneath the tip of the boom ensures the weight’s vertical line passes through the lifting point, giving a clean, vertical pull. This minimizes lateral forces and swings, helping to maintain balance and control during the lift.

If the center of gravity were toward the rotation point or the base, it would create sideways moments that could destabilize the crane or cause tipping. If the center of gravity were placed at the load hook, the pull might not align properly with the boom, increasing swing and instability.