Mobile cranes with booms over 200 ft long or with a capacity greater than _____ require a load-indicating device or its equivalent.

Mobile cranes with booms over 200 ft long or with a capacity greater than _____ require a load-indicating device or its equivalent.

• A. 100 tons
• B. 50 tons
• C. 20 tons
• D. 75 tons

Answer: (B)

The essential idea is safety: when a mobile crane can work with a very long lever arm or with a high lifting capacity, it becomes much easier to overload the crane or tip it over. A load-indicating device provides real-time feedback on the load relative to the crane’s capacity, helping the operator keep the lift within safe limits. Here, a long boom (over 200 ft) or a rated capacity over fifty tons triggers the requirement for a load-indicating device (or an equivalent system, such as a load moment indicator). The device helps ensure the crane won’t be operated beyond what the geometry and capacity allow, reducing the risk of tipping or structural failure. The device, or its equivalent, typically integrates with the crane controls to warn or limit hoisting as the load approaches the crane’s rated capacity. So the threshold that completes the statement is fifty tons.

The essential idea is safety: when a mobile crane can work with a very long lever arm or with a high lifting capacity, it becomes much easier to overload the crane or tip it over. A load-indicating device provides real-time feedback on the load relative to the crane’s capacity, helping the operator keep the lift within safe limits.

Here, a long boom (over 200 ft) or a rated capacity over fifty tons triggers the requirement for a load-indicating device (or an equivalent system, such as a load moment indicator). The device helps ensure the crane won’t be operated beyond what the geometry and capacity allow, reducing the risk of tipping or structural failure. The device, or its equivalent, typically integrates with the crane controls to warn or limit hoisting as the load approaches the crane’s rated capacity.

So the threshold that completes the statement is fifty tons.