What type of construction is designated as Type V?

Type V construction is defined as wood construction where all of the building's structural elements are made of wood or other combustible materials. This type of construction is commonly used for residential buildings and smaller structures. The primary characteristics that define Type V construction include its lightweight wooden framing, which allows for faster building times, as well as its vulnerability to fire due to the materials used.

This categorization is particularly important for firefighting because buildings constructed using Type V methods are more prone to rapid fire spread, making it essential for firefighters to be aware of the potential challenges when responding to incidents within these structures. Recognition of Type V construction helps firefighters assess risks, plan appropriate responses, and implement effective firefighting strategies.

In comparison, non-combustible construction (which describes structures built primarily with steel, concrete, or masonry) and ordinary construction (which typically includes a combination of combustible and non-combustible materials) differ significantly from Type V in terms of fire resistance and structural behavior in a fire scenario. Heavy timber construction, while also using wood, features larger wooden beams that can offer more fire resistance than conventional Type V framing. Thus, the distinctive classification of Type V highlights the specific characteristics and risks associated with this common type of building material.