Which fire classification applies to fires involving combustible materials such as paper and wood?

Fires involving combustible materials such as paper and wood are classified as Class A fires. This classification is specifically designated for ordinary combustibles, which also include materials like cloth, rubber, and many types of plastics. Class A fires are characterized by their ability to leave ash after combustion, which is a key feature that helps in identifying the appropriate extinguishment methods.

The extinguishing agents for Class A fires typically include water and certain types of foam, which effectively cool down the burning materials and remove the heat element necessary for the fire to continue. Understanding this classification is essential for firefighters as it helps in selecting the right equipment and tactics for fire suppression. The other classifications refer to different types of materials—Class B for flammable liquids, Class D for combustible metals, and Class K for cooking oils and fats—each requiring distinct approaches to effectively manage the hazards they present.