Which construction type uses exterior walls and structural members that are noncombustible or limited combustible, with interior wood components allowed?

Which construction type uses exterior walls and structural members that are noncombustible or limited combustible, with interior wood components allowed?

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

Answer: (B)

The main idea here is how construction types define what materials can make up the exterior walls, the structural frame, and the interior components. This description fits Ordinary Construction. In this type, the exterior walls are noncombustible (often masonry), and the structural frame is noncombustible or limited combustible, while interior spaces can include wood components. That combination—noncombustible exterior and framing with interior wood—is what distinguishes it from the other types: the other categories either require all noncombustible interiors (Type II), are fully fire-resistive with noncombustible interiors (Type I), or use predominantly heavy timber for the structure with different interior expectations (Type IV). Therefore, this construction aligns with Type III.

The main idea here is how construction types define what materials can make up the exterior walls, the structural frame, and the interior components. This description fits Ordinary Construction. In this type, the exterior walls are noncombustible (often masonry), and the structural frame is noncombustible or limited combustible, while interior spaces can include wood components. That combination—noncombustible exterior and framing with interior wood—is what distinguishes it from the other types: the other categories either require all noncombustible interiors (Type II), are fully fire-resistive with noncombustible interiors (Type I), or use predominantly heavy timber for the structure with different interior expectations (Type IV). Therefore, this construction aligns with Type III.