What is a main common characteristic of ordinary construction?

A main common characteristic of ordinary construction is indeed wood framing. This type of construction typically involves the use of wood as the primary material for structural elements, such as walls, floors, and roofs. Ordinary construction is often defined by its use of lightweight, combustible materials, which can include wood framing.

The term "ordinary construction" generally refers to buildings that are built using both masonry and wood framing combination. However, the key element is the wood framing, as it provides both the structure and finishes. Wood's availability, cost-effectiveness, and ease of manipulation make it a preferred choice in many communities.

While masonry walls, steel beams, and concrete slabs can be part of construction, they are not defining features of ordinary construction. Buildings that incorporate extensive masonry or steel would typically fall into different construction categories. Therefore, recognizing wood framing as a characteristic of ordinary construction is crucial for understanding fire resistance, safety implications, and the ways in which building materials influence fire behavior.