In fire protection terms, which construction type is wood-based in exterior walls and structural components?

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

Answer: (B)

Wood-framed, combustible construction is defined by using wood for both the structural frame and the exterior walls. This is the wood-frame construction type, where the entire structural system is built from wood. It’s different from the noncombustible types I and II, which use steel or concrete for the structure and exterior walls; Type III uses noncombustible exterior walls but may have wood framing inside; and Type IV uses large timber members but exterior walls are typically not wood. Since both the exterior walls and the structural components are wood-based, this description aligns with wood-frame construction.