What is the primary characteristic of Type 3 construction?

Type 3 construction, also known as "Ordinary Construction," is characterized by the use of both combustible and non-combustible materials where the exterior walls are typically masonry or concrete, and the interior framing can consist of wood. This construction type allows for the use of heavy timber and masonry, contributing to its structural integrity while also posing potential fire risks due to the presence of combustible elements.

The strong emphasis on masonry or thick exterior walls provides a level of fire resistance and support for the overall structure. While there may be some non-combustible components, the defining feature of Type 3 construction is the combination of traditional elements, such as heavy timber, alongside materials that can increase fire risk if not properly managed.

Other options do not accurately capture the essence of Type 3 construction. For example, the notion of entirely non-combustible materials aligns more with Type 1 construction, while exclusively using metal studs is more characteristic of Type 2 construction. The concept of multiple void spaces for airflow does not specifically relate to Type 3 construction and could apply in various construction types but is not a defining feature.