Noncombustible construction is construction in which the structural members are of noncombustible materials. The materials are typically of the following structural elements. Which one is not a typical noncombustible structural material.

Noncombustible construction is construction in which the structural members are of noncombustible materials. The materials are typically of the following structural elements. Which one is not a typical noncombustible structural material.

• A. Structural Glass
• B. Structural Steel
• C. Concrete
• D. Aluminum

Answer: (D)

Noncombustible construction relies on materials that do not ignite and that keep their load-carrying ability during a fire. Structural glass, structural steel, and concrete are typical choices because they resist burning and maintain strength under heat for a fire-resistance period. Aluminum doesn’t fit as a standard noncombustible structural material because its fire performance is less favorable: it has a relatively low melting point and can lose strength and deform quickly in a fire; in some conditions, aluminum alloys can even burn or produce molten droplets. For that reason, aluminum is generally avoided for primary structural members in noncombustible construction, though it might appear in non-structural components or areas where fire performance is less critical.

Noncombustible construction relies on materials that do not ignite and that keep their load-carrying ability during a fire. Structural glass, structural steel, and concrete are typical choices because they resist burning and maintain strength under heat for a fire-resistance period. Aluminum doesn’t fit as a standard noncombustible structural material because its fire performance is less favorable: it has a relatively low melting point and can lose strength and deform quickly in a fire; in some conditions, aluminum alloys can even burn or produce molten droplets. For that reason, aluminum is generally avoided for primary structural members in noncombustible construction, though it might appear in non-structural components or areas where fire performance is less critical.