How does counterweight affect crane stability?

• A. It increases tipping risk.
• B. It balances the load and crane arm, reducing tipping risk.
• C. It has no effect on stability.
• D. It only affects calibration of load charts.

Answer: (B)

Counterweights balance the crane by offsetting the weight of the load and the boom, so the overall center of gravity stays over the crane’s base. As you lift a load or extend the boom, a tipping moment can push the crane to tilt to one side. The counterweight creates an opposing moment, keeping the center of gravity inside the base footprint and reducing tipping risk. This is why counterweights are essential for stability during operation. They do more than adjust load charts; their primary role is to physically stabilize the crane, especially at long reaches, higher lifts, or in windy or dynamic conditions.