Which construction type is the most common in the United States?

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

Answer: (D)

Wood-frame construction, or Type V, is the most common in the United States. This comes from how home building is typically done: most houses use wood studs, joists, and roofing members because lumber is widely available, easy to work with, and cost-effective. Platform framing, which dominates residential construction, allows quick, flexible layouts that fit the vast majority of single-family homes and many townhomes. Modern codes require fire-resistive assemblies and proper fireblocking, but these requirements are generally more affordable to meet in wood-frame buildings than in noncombustible types, making Type V the standard choice for the bulk of U.S. construction. Other types are more common in commercial, high-rise, or specific architectural contexts, while Type V remains the default for most housing.