In masonry noncombustible construction, exterior walls are masonry while floors and roof are made of what?

• A. Metal or other noncombustible materials
• B. Wood
• C. Brick
• D. Plastic

Answer: (A)

In masonry noncombustible construction, the goal is to keep all structural parts noncombustible. Exterior walls are masonry for fire resistance, and the floors and roof are also built from noncombustible materials to maintain that fire performance and structural integrity. That makes metal or other noncombustible materials the best fit, such as steel framing or concrete-supported systems used for floors and the roof. Wood is combustible, so it wouldn’t align with this construction type. Brick is itself a masonry material, but floors and roofs aren’t typically brick in this category. Plastic isn’t used for primary structural floors or roofs in standard noncombustible construction.