An 80-tonne mobile crane is being used for a lift. The wind speed, measured at the boom tip, is consistently 45 km/h. According to CSA Z150, what action should the crane operator take?

Question: An 80-tonne mobile crane is being used for a lift. The wind speed, measured at the boom tip, is consistently 45 km/h. According to CSA Z150, what action should the crane operator take?

Answer options:

• Continue the lift with caution, as this speed is acceptable.
• Reduce the load to account for wind forces and continue the lift. ✅ Immediately cease crane operations until the wind subsides.
• Orient the boom directly into the wind to minimize surface area.

Correct answer: Immediately cease crane operations until the wind subsides.

Explanation: CSA Z150 generally specifies that crane operations, particularly with mobile cranes, should cease when wind speeds at the boom tip exceed 48 km/h (30 mph), or based on the manufacturer's recommendations if lower. Since 45 km/h is approaching or at the limit for many cranes, and safety is paramount, ceasing operations is the safest action. Reducing the load might not be sufficient, and orienting the boom is not a universal solution.