Which type of construction is called ordinary construction?

The correct answer identifies ordinary construction, which is classified as Type III according to the National Fire Protection Association (NFPA) standards. Ordinary construction involves buildings that have exterior walls made of non-combustible materials, such as brick or concrete, while the interior structures may consist of combustible materials like wood. This construction type provides a balance between fire resistance and cost, making it common for commercial and residential buildings.

In the context of fire safety, understanding ordinary construction is crucial. Buildings of this type are subject to specific fire codes and regulations that guide how they should be designed, constructed, and maintained to minimize fire risk and enhance occupant safety. The presence of both non-combustible exteriors and combustible interiors necessitates careful consideration of fire prevention and containment strategies.

Other types of construction referenced in this question, such as Type I, II, and IV, have distinct characteristics that differentiate them from ordinary construction. For instance, Type I construction typically involves highly fire-resistant materials and is commonly used in high-rise buildings, while Type IV involves heavy timber construction, which presents different fire behavior and risks. Understanding these classifications helps firefighters assess building hazards effectively and plan their response strategies accordingly.