Which rating is required for fire extinguishers on mobile cranes? (alternate phrasing)

Which rating is required for fire extinguishers on mobile cranes? (alternate phrasing)

• A. 10BC
• B. 5BC
• C. 2A 10BC
• D. 4A 60BC

Answer: (A)

The main idea is that fire extinguishers on mobile cranes must address the typical hazards you’ll find around a crane: flammable liquids and electrical equipment. Hydraulic oil and fuels create Class B fires, while energized electrical components create Class C fires. You want a extinguisher that can handle both of these without being overkill for other types of fires. A 10 BC extinguisher provides that balance: it is rated for flammable liquid fires (B) and electrical fires (C) and has enough discharge capacity to control a small to moderate fire in the crane environment. The A rating, which targets ordinary combustibles like wood and paper, isn’t needed here because those materials aren’t the primary hazard around a mobile crane. Extinguishers with larger BC ratings or those that include an A rating don’t match the typical minimum requirement for crane safety as closely as 10 BC does, since the standard expectation is a BC extinguisher of at least that size to cover the common crane fire risks.

The main idea is that fire extinguishers on mobile cranes must address the typical hazards you’ll find around a crane: flammable liquids and electrical equipment. Hydraulic oil and fuels create Class B fires, while energized electrical components create Class C fires. You want a extinguisher that can handle both of these without being overkill for other types of fires.

A 10 BC extinguisher provides that balance: it is rated for flammable liquid fires (B) and electrical fires (C) and has enough discharge capacity to control a small to moderate fire in the crane environment. The A rating, which targets ordinary combustibles like wood and paper, isn’t needed here because those materials aren’t the primary hazard around a mobile crane. Extinguishers with larger BC ratings or those that include an A rating don’t match the typical minimum requirement for crane safety as closely as 10 BC does, since the standard expectation is a BC extinguisher of at least that size to cover the common crane fire risks.