What is generally considered the most common class of fire?

Class A fires are primarily defined as fires involving ordinary combustible materials, such as wood, paper, cloth, rubber, and many plastics. This class of fire is considered the most common because these materials are ubiquitous in both residential and commercial settings. Class A fires typically occur in homes, offices, and other environments where everyday materials are present, making them the most frequently encountered by firefighters.

When battling Class A fires, the most effective extinguishing agents include water and certain foam solutions, which cool the burning materials and extinguish the flames. Understanding the nature of Class A fires is crucial for firefighters, as they must be prepared to effectively respond to these prevalent situations. The categorization of fire classes helps firefighters identify appropriate strategies and equipment for fire suppression.