Which construction type uses exterior walls, bearing walls, floors, roofs, and supports made completely or partially of wood or smaller dimensions than Type 4?

• A. Type 2
• B. Type 3
• C. Type 4
• D. Type 5

Answer: (D)

This question is about how construction types are defined by the materials used for the structural framing. The description matches wood-frame construction, where the exterior walls, bearing walls, floors, roofs, and supports are all made of wood or other combustibles, with framing members that are standard dimensions rather than the large, heavy timbers of Type IV. That makes it Type 5. Type II and I are noncombustible, Type III has noncombustible exterior walls with interior framing that can be combustible, and Type IV uses heavy timber for the main structural members. So the wood-frame construction best fits the scenario described.