Florida Building Code Practice Exam

What type of construction requires that fire-rated assemblies be used in both vertical and horizontal concealed spaces?

1. Wood frame construction

2. Type III construction

3. Type IV construction

4. Steel frame construction

The correct answer is: Wood frame construction

Fire-rated assemblies are crucial in preventing the spread of fire and protecting structural integrity in buildings. Wood frame construction typically involves the use of lightweight wood framing, which can be more susceptible to fire spread. Due to this vulnerability, building codes require the use of fire-rated assemblies in concealed spaces, both vertical (such as walls and shafts) and horizontal (such as ceilings and floors) to enhance fire protection and safety. In the context of Type III construction, which consists of both combustible and non-combustible materials, there are specific requirements for fire-rated assemblies but they may not necessitate fire-rated protection in all concealed spaces as strictly as wood frame structures. Type IV construction, also known as heavy timber construction, has different regulations that usually allow for more leniency regarding fire-rated requirements due to the substantial nature of the timber. Steel frame construction is generally non-combustible and may not require the same level of fire-rated assemblies in concealed spaces. Thus, the nature of wood frame construction necessitates the required implementation of fire-rated assemblies to mitigate fire risks effectively within both vertical and horizontal concealed spaces.