What feature is designed to prevent the spread of fire within a structure and should extend from the foundation through and above combustible roofs?

• A. Fire stops
• B. Fire Walls
• C. Type II
• D. Exit access

Answer: (B)

Fire walls are continuous, fire-resistance-rated barriers that subdivide a building into separate compartments and stop fire from moving from one area to another. They’re designed to run from the foundation all the way up through the structure and above any combustible roof assembly, so the barrier remains intact even if the roof area is involved. Openings in a fire wall are protected to maintain the barrier’s integrity, helping to contain flames and heat within a designated portion of the building and allowing more time for occupants to evacuate and for firefighters to respond. This is different from fire stops, which are horizontal barriers in concealed spaces to slow vertical spread and do not extend from foundation through the roof; construction type and means of egress are not about providing this kind of continuous, roof-to-foundation fire separation. The feature described is fire walls.