What is the term for the maximum safe load a machine can carry at a given outreach or radius?

• A. Safe mass
• B. Payload limit
• C. Rated capacity
• D. Load factor

Answer: (C)

The maximum load that can be lifted safely at a given outreach or radius is called the rated capacity. This is a value provided by the machine’s manufacturer and shown on load charts for specific configurations (boom length, angle, attachments, outriggers, counterweights). It defines the limit beyond which lifting would risk tipping the crane or overstressing its structure, so the operator must stay within this load for the chosen radius. As the outreach increases, the rated capacity typically decreases due to leverage and stability considerations. The charting lets the operator verify that the actual load does not exceed the rated capacity at that radius. Other terms don’t fit as precisely: safe mass isn’t a standard designation for this limit, payload limit is vague about the safe capacity at a specific radius, and load factor is a ratio used in design to compare actual load to capacity, not the maximum safe load itself.