Which class of fire involves common combustibles such as wood and paper?

The classification of fires is critical for effective firefighting, particularly in understanding which extinguishing agents to use. Fires involving common combustibles such as wood, paper, and cloth fall under Class A.

Class A fires are characterized by solid materials that can generate ash, which is the defining feature of this class. These materials ignite easily, and when burned, they produce embers and ash that can facilitate the spread of fire if not controlled properly. The extinguishing agents for Class A fires typically include water and certain types of foam, which can cool the burning materials and reduce the temperature below the ignition point.

In contrast, Class B fires involve flammable liquids and gases, Class C fires pertain to electrical equipment, and Class D fires are associated with combustible metals. Understanding these classifications helps firefighters choose the appropriate methods for extinguishing fires safely and effectively.