Type IV buildings normally consist of what type of exterior walls?

Type IV buildings normally consist of what type of exterior walls?

• A. Curtain walls
• B. Masonry walls that surround the heavy wooden timbers
• C. Steel framing with veneer
• D. Concrete block walls

Answer: (B)

Type IV construction uses a heavy timber frame, and the exterior walls are masonry that surround the heavy wooden timbers. This masonry enclosure protects the timber, provides fire resistance, and defines the characteristic look of heavy timber buildings with a solid, noncombustible shell around the wood. Curtain walls are thin, nonloadbearing enclosures not suited to this type; steel framing with veneer describes a different system with a steel skeleton and cladding; concrete block walls can be noncombustible but aren’t the typical exterior enclosure for Type IV, which centers on masonry surrounding the timber frame.

Type IV construction uses a heavy timber frame, and the exterior walls are masonry that surround the heavy wooden timbers. This masonry enclosure protects the timber, provides fire resistance, and defines the characteristic look of heavy timber buildings with a solid, noncombustible shell around the wood. Curtain walls are thin, nonloadbearing enclosures not suited to this type; steel framing with veneer describes a different system with a steel skeleton and cladding; concrete block walls can be noncombustible but aren’t the typical exterior enclosure for Type IV, which centers on masonry surrounding the timber frame.