Exterior walls and interior structural members that are approved noncombustible or limited-combustible materials and interior structural members constructed wholly or partly of wood are which construction type?

• A. Type I
• B. Type II
• C. Type III
• D. Type IV

Answer: (C)

This represents ordinary construction. In this type, the exterior walls are built from noncombustible or limited‑combustible materials, while the interior structural members are wood (or other combustible materials). That combination—noncombustible exterior with wood interior framing—is the defining feature of Type III construction.

Think of a brick or masonry exterior with a wooden framework inside. This differs from all-noncombustible types (Type I and II), which use noncombustible materials for both exterior and interior structural elements; from Type IV, which uses heavy timber interior structures; and from Type V, which can use combustibles throughout the building.