Which construction type is primarily characterized by a wood frame structure?

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

Answer: (D)

Wood-frame construction is defined by using wood for the building’s structural skeleton—the studs, joists, and rafters that carry the loads. That defining feature makes the wood-frame construction type the best answer, as it is the category most characterized by a wooden framework and is the common method for houses and many small buildings. Other construction types rely on noncombustible materials for the frame (like steel or concrete), or mix exterior noncombustible walls with interior framing, or use large solid timber in a different, heavier category. So when a type is defined by having a wood frame, it’s the wood-frame construction type.