All structural components of the structure are protected in some way from the products of combustion. Typically mid and high-rise structures with high-occupancies. What designation applies?

• A. Wood Construction
• B. Type I - Fire Resistive
• C. Steel
• D. Metal Deck Roof Fire

Answer: (B)

All structural components protected from the products of combustion points to fire-resistive construction, the Type I designation. This means the building’s frame is noncombustible and protected with fire-resistance ratings so the structure retains its strength during a fire. In mid- and high-rise buildings with high occupancies, this level of protection is essential to keep columns, beams, floors, and roofs intact long enough for occupants to evacuate and for firefighters to operate. The protection can be concrete encasement or applied fireproofing to steel, ensuring the structural elements resist heat and do not fail prematurely. Other options don’t reflect this comprehensive protection level: wood construction is inherently combustible, steel without specified protection isn’t automatically fire-resistive, and “Metal Deck Roof Fire” isn’t a recognized construction designation.