High speed continuous operation is called what and requires what rating deduction?

• A. Duty Cycle; 20%
• B. Rapid Run; 15%
• C. Continuous Lift; 25%
• D. Fast Cycle; 10%

Answer: (A)

High speed continuous operation is described by the term duty cycle. Duty cycle captures how the crane is used over time and how that usage changes the safe lifting capacity. When you run a crane at high speed for extended periods, heat buildup and wear increase, so the rated capacity must be reduced to maintain a safe margin. The standard deduction shown here is 20%, meaning you can lift up to 80% of the crane’s rated capacity under this duty pattern. Other phrases like rapid run, continuous lift, or fast cycle aren’t the recognized designation for this rating adjustment, so they don’t specify the necessary reduction.