Which statement best describes exterior wall materials for Type II and Type III constructions?

Which statement best describes exterior wall materials for Type II and Type III constructions?

• A. Type II exterior walls are noncombustible; Type III exterior walls are noncombustible.
• B. Type II exterior walls are wood; Type III exterior walls are steel.
• C. Type II exterior walls are brick veneer; Type III exterior walls are glass.
• D. Type II exterior walls are metal; Type III exterior walls are plastic.

Answer: (A)

Exterior walls in these construction types are designed to be noncombustible, helping to limit fire spread through the building envelope. For Type II, the exterior walls and the structural frame are noncombustible, so you’d see materials like concrete, steel, or masonry forming the wall system. In Type III, the exterior walls are also noncombustible, but the interior framework can be wood or other combustible materials, which is what distinguishes it from Type II. The other options propose exterior-wall materials that aren’t consistently noncombustible for these types, so they don’t fit the established requirement.

Exterior walls in these construction types are designed to be noncombustible, helping to limit fire spread through the building envelope. For Type II, the exterior walls and the structural frame are noncombustible, so you’d see materials like concrete, steel, or masonry forming the wall system. In Type III, the exterior walls are also noncombustible, but the interior framework can be wood or other combustible materials, which is what distinguishes it from Type II. The other options propose exterior-wall materials that aren’t consistently noncombustible for these types, so they don’t fit the established requirement.