Which construction type is described as having walls, floors, and the roof support system all made of non-combustible material, with large overhangs and facades, commonly used in manufacturing and commercial occupancies?

Which construction type is described as having walls, floors, and the roof support system all made of non-combustible material, with large overhangs and facades, commonly used in manufacturing and commercial occupancies?

• A. Type II - Non-Combustible
• B. Type III - Ordinary Construction
• C. Type IV - Heavy Timber
• D. Type V - Wood Frame Construction

Answer: (A)

Noncombustible construction means every structural element—walls, floors, and the roof support system—is built from noncombustible material such as steel, concrete, or masonry. This approach is favored in manufacturing and many commercial occupancies because it provides greater inherent fire resistance and helps limit fire spread through structure, even when large exterior overhangs or facade features are present. The description—all structural components noncombustible and the setting of manufacturing or commercial use with big overhangs—fits this construction type most precisely. Other types mix combustible elements with noncombustible ones or rely on timber for the main structural frame, which doesn’t meet the “all structural parts are noncombustible” criterion. For example, ordinary construction may have noncombustible exterior walls but interior framing can be combustible; heavy timber uses substantial timber members; and wood frame construction uses wood for walls and structure throughout. Fire-resistive construction emphasizes rated assemblies rather than universal noncombustibility, so it’s not defined by every component being noncombustible.

Noncombustible construction means every structural element—walls, floors, and the roof support system—is built from noncombustible material such as steel, concrete, or masonry. This approach is favored in manufacturing and many commercial occupancies because it provides greater inherent fire resistance and helps limit fire spread through structure, even when large exterior overhangs or facade features are present. The description—all structural components noncombustible and the setting of manufacturing or commercial use with big overhangs—fits this construction type most precisely.

Other types mix combustible elements with noncombustible ones or rely on timber for the main structural frame, which doesn’t meet the “all structural parts are noncombustible” criterion. For example, ordinary construction may have noncombustible exterior walls but interior framing can be combustible; heavy timber uses substantial timber members; and wood frame construction uses wood for walls and structure throughout. Fire-resistive construction emphasizes rated assemblies rather than universal noncombustibility, so it’s not defined by every component being noncombustible.