Which statement best describes Type I construction?

• A. Least resistance to fire spread; noncombustible.
• B. Moderate resistance; wooden elements.
• C. Susceptible to collapse under fire early.
• D. Best resistance to fire spread and early collapse; fire-resistive.

Answer: (D)

Type I construction is fire-resistive, built to resist fire spread and maintain structural integrity for a specified period. It uses noncombustible materials and protective fireproofing for structural members, often resulting in a robust fire resistance rating. The option describing the best resistance to fire spread and early collapse, and labeling the system as fire-resistive, matches this design goal. In contrast, descriptions involving wooden elements or a tendency to collapse early reflect less fire-resistant types, where components can burn or lose strength more quickly.