What is a key characteristic of Type 5 construction?

Type 5 construction, often referred to as "wood frame" construction, is predominantly characterized by the use of light-frame wood, particularly for the building's structural components. This construction type allows for flexibility and ease of assembly, making it a common choice for residential buildings and smaller structures. The wood framing typically consists of a system of studs, joists, and rafters, which offer adequate support while maintaining a lightweight profile.

The nature of Type 5 construction also means that it is generally less resistant to fire compared to other types that utilize more substantial materials, like heavy timber or non-combustible elements. Understanding this characteristic is crucial for fire investigators, as it has implications for fire spread, building stability during a fire, and overall safety considerations.

In contrast, the other options refer to material types or design features that do not align with the defining aspects of Type 5 construction. For instance, heavy timber is more representative of Type 4 construction, while non-combustible materials pertain to Type 1 construction. Flat roofs can be characteristic of multiple construction types and are not exclusive indicators of Type 5, as various architectural styles may incorporate flat roofing regardless of the underlying structure.