How does wind affect crane operations and when should lifting be stopped?

• A. Wind has no impact on capacity.
• B. Wind can reduce stability and capacity; lifting should stop when wind exceeds operating limits or when the load becomes unstable.
• C. Wind only affects outdoor lifts.
• D. Wind can be used to assist slewing if within limits.

Answer: (B)

Wind creates lateral forces and gust-driven sway on both the crane and the suspended load, introducing dynamic effects that reduce stability and the effective lifting capacity. When wind is present, those forces can cause the load to swing, the boom to drift, or the crane to become unstable, increasing the risk of tip-over, collision, or dropped loads. Because safety margins assume calmer conditions, the crane must not operate once wind exceeds the manufacturer’s published operating limits or when the load shows signs of instability—such as excessive sway or uncontrolled movement. The specific wind limits depend on the crane type, configuration, height, and load, so operators should consult the crane’s wind limits for the current setup. And never try to use wind to assist slewing or lifting; wind is unpredictable and can change quickly, making such a practice unsafe.