Personnel platforms gross loads cannot exceed what percent of a crane's capacity at the farthest necessary radius?

• A. 60%
• B. 50%
• C. 75%
• D. 90%

Answer: (B)

When using a personnel platform, the crane’s capacity must be reduced to maintain a safe margin for dynamic forces and movement. The farthest radius you’ll operate at is where the crane has its lowest capacity, so the total weight of the platform plus workers and any tools must not exceed 50% of that rated capacity at that radius. This 50% rule provides enough remaining capacity to handle wind, acceleration, and other unexpected loads, reducing the risk of tipping or overload. So, the limit is half of the crane’s rated capacity at the farthest necessary radius.