What material is most commonly involved in Class A fires?

Class A fires are characterized by ordinary combustibles, which primarily include materials such as wood, paper, cloth, trash, and some plastics. These materials are common in residential and commercial settings, making them the most frequently encountered type of fire. The significance of this classification lies in the methods of extinguishing such fires, which often involve water or foam, as these materials typically burn at moderate temperatures and produce embers that can reignite if not fully extinguished.

In contrast, other materials mentioned, such as oils, gases, and metals, pertain to different classes of fires. Oils and flammable liquids fall under Class B fires, which require specific extinguishing agents like foam or dry chemical agents. Flammable gases can also result in Class B fires, while metals like magnesium or sodium belong to Class D fires, which require specialized extinguishing techniques due to their unique burning characteristics. Understanding these classifications is essential for effective fire prevention and control strategies.