According to this wind reduction chart, at what point must all crane operations stop?

According to this wind reduction chart, at what point must all crane operations stop?

• A. More than 50 mph wind speed
• B. 10 mph or more
• C. 25 mph
• D. More than 35 mph wind speed

Answer: (D)

Wind imposes lateral forces on the crane and any suspended load, increasing sway, control difficulty, and the risk of tipping. The wind reduction chart sets a stop point at 35 mph: when wind speed exceeds this, all crane operations must halt to keep people and equipment safe. This threshold is used because above it the crane’s stability and load handling become unsafe under common configurations. Slower winds, like 10 mph or 25 mph, fall within the chart’s safe operating range, while much higher winds would also require stopping, but the defined trigger shown on the chart is a wind speed greater than 35 mph.

Wind imposes lateral forces on the crane and any suspended load, increasing sway, control difficulty, and the risk of tipping. The wind reduction chart sets a stop point at 35 mph: when wind speed exceeds this, all crane operations must halt to keep people and equipment safe. This threshold is used because above it the crane’s stability and load handling become unsafe under common configurations. Slower winds, like 10 mph or 25 mph, fall within the chart’s safe operating range, while much higher winds would also require stopping, but the defined trigger shown on the chart is a wind speed greater than 35 mph.