What would be the main consideration for a dogman lifting a live load?

What would be the main consideration for a dogman lifting a live load?

• A. The weather conditions
• B. The weight of the load
• C. The possibility of the centre of gravity moving
• D. The speed of the lift

Answer: (C)

When lifting a live load, the crucial factor is how the load's center of gravity can move. A live load isn’t rigid, so it can shift, bounce, or wriggle, causing the weight to re-center itself as the lift progresses. That movement changes the line of action of gravity relative to the rigging and crane, leading to unpredictable forces on slings and shackles and often to the load swinging or twisting. This dynamic behavior is what makes CG movement the dominant safety concern, because it directly affects control, tension, and stability during the lift. While weather, total weight, and lift speed matter, they don’t address how the load may actively shift mid-l lift, which is why the possibility of the center of gravity moving is the main consideration.

When lifting a live load, the crucial factor is how the load's center of gravity can move. A live load isn’t rigid, so it can shift, bounce, or wriggle, causing the weight to re-center itself as the lift progresses. That movement changes the line of action of gravity relative to the rigging and crane, leading to unpredictable forces on slings and shackles and often to the load swinging or twisting. This dynamic behavior is what makes CG movement the dominant safety concern, because it directly affects control, tension, and stability during the lift. While weather, total weight, and lift speed matter, they don’t address how the load may actively shift mid-l lift, which is why the possibility of the center of gravity moving is the main consideration.