For new or overhauled crane systems, how long must the static load test be held?

• A. 5 minutes
• B. Not less than 10 minutes
• C. 10 minutes
• D. 20 minutes

Answer: (C)

Holding the static load test for a new or overhauled crane for a set period verifies that the crane can carry its rated load without any movement, drift, or creeping and that all safety systems remain functioning under that load. Ten minutes gives enough time to reveal slow deflection, brake slipping, overheating, or loosening of connections that might not appear in a shorter test. By observing the crane for that duration, you confirm the structural and mechanical integrity of the system before it goes into service, and you can document that it meets the required performance at the rated capacity.

Shorter durations, like five minutes, might not expose gradual deflection or creeping, while a longer period isn’t required by this standard. The phrasing “not less than 10 minutes” would indicate a minimum that could vary, but the specified duration here is ten minutes.