Which construction type is associated with being noncombustible exterior walls with interior framing that may be wood or other combustible?

• A. Type I (Fire-Resistive)
• B. Type III (Ordinary)
• C. Type II (Noncombustible)
• D. Type IV (Heavy Timber)

Answer: (B)

Exterior walls that are noncombustible create a fire-resistant shell, while interior framing may be wood or other combustible materials. This combination is characteristic of Ordinary construction. In this type, the exterior walls are noncombustible (masonry, concrete, or steel), but the interior structural frame can be wood or another combustible material, allowing more economical interior construction. This contrasts with fire-resistive construction, which uses fire-rated materials throughout; noncombustible construction, which keeps interior framing noncombustible; and heavy timber construction, which uses substantial wooden framing inside.