Type IV construction has which relationship to Type V in terms of fire resistance rating?

Type IV construction, often referred to as "heavy timber" construction, is characterized by the use of solid wood members and specific design features that contribute to a notable level of fire resistance. Due to the larger size of the wood elements and the inherent properties of the materials, structures built under this classification are generally designed to resist fire for a prolonged period when compared to lighter, more flammable options.

In contrast, Type V construction, which typically consists of wood framing and is more susceptible to fire hazards, has a lower fire resistance rating. Type V buildings usually use smaller, lighter wood members, which do not provide the same level of structural integrity when exposed to fire.

This establishes that Type IV construction indeed possesses a higher fire resistance rating relative to Type V construction. This relationship plays an essential role in building safety regulations, as buildings with higher fire resistance ratings can mitigate the spread of fire, providing occupants more time to evacuate and firefighters more time to manage the situation.