Which type of construction is referred to as ordinary construction?

Ordinary construction is characterized by masoned exterior walls and wood framing, typically found in commercial buildings and older residential structures. This type of construction is also known for having a mix of non-combustible materials for the exterior, while the internal structural elements are usually constructed of wood. The distinguishing feature of this type is that it often provides a moderate level of fire resistance but still has vulnerabilities due to its wood framing, which can ignite and contribute to the spread of fire.

Type III construction is specifically categorized under ordinary construction because it meets these criteria: it utilizes exterior walls made of non-combustible materials or fire-resistant materials and allows for combustible materials like wood in the interior structural elements. Understanding this classification is essential for firefighters as it informs them about potential fire behavior and building weaknesses during firefighting operations.