Which material offers impressive compressive strength at relatively low cost, used in floors, walls, and ceilings, and is noncombustible but has low tensile strength unless reinforced?

Which material offers impressive compressive strength at relatively low cost, used in floors, walls, and ceilings, and is noncombustible but has low tensile strength unless reinforced?

• A. Concrete
• B. Steel Construction
• C. Spalling
• D. Type I - Fire Resistive

Answer: (A)

Concrete matches these properties because it delivers high compressive strength at a relatively low cost, and it’s noncombustible, making it a common choice for floors, walls, and ceilings. Its main weakness is tension: concrete resists compression well but has low tensile strength unless it’s reinforced. By embedding steel bars or fibers, the concrete becomes a reinforced composite that can handle both compression and tension effectively, which is why it’s so widely used in structural systems. Other options don’t fit these specifics. Spalling isn’t a material; it’s a failure mode of concrete under certain conditions. Type I - Fire Resistive refers to a fire-rating category, not a material. Steel construction is strong and noncombustible, but it doesn’t align with having low tensile strength unless reinforced, and it’s typically not chosen for the described combination of low cost and broad use in floors, walls, and ceilings.

Concrete matches these properties because it delivers high compressive strength at a relatively low cost, and it’s noncombustible, making it a common choice for floors, walls, and ceilings. Its main weakness is tension: concrete resists compression well but has low tensile strength unless it’s reinforced. By embedding steel bars or fibers, the concrete becomes a reinforced composite that can handle both compression and tension effectively, which is why it’s so widely used in structural systems.

Other options don’t fit these specifics. Spalling isn’t a material; it’s a failure mode of concrete under certain conditions. Type I - Fire Resistive refers to a fire-rating category, not a material. Steel construction is strong and noncombustible, but it doesn’t align with having low tensile strength unless reinforced, and it’s typically not chosen for the described combination of low cost and broad use in floors, walls, and ceilings.