The type of construction where the exterior walls and structural members are made of noncombustible or limited combustible materials and the interior is completely or partially made of wood is:

The type of construction where the exterior walls and structural members are made of noncombustible or limited combustible materials and the interior is completely or partially made of wood is:

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

Answer: (A)

Type III construction. In this ordinary construction pattern, the exterior walls and the structural frame are built from noncombustible or limited-combustible materials, while the interior components are wood. That mix affects fire behavior: the sturdy, noncombustible exterior slows exterior flame progression and helps keep the shell intact for a time, but the interior wooden framework provides a ready fuel source that can drive rapid interior fire growth and reach concealed spaces quickly. This differs from all-noncombustible types (where interior structures are also noncombustible) and from types where timber is used for the interior (heavy timber or all-wood), which change how quickly interior fire develops and how the building behaves under fire.

Type III construction. In this ordinary construction pattern, the exterior walls and the structural frame are built from noncombustible or limited-combustible materials, while the interior components are wood. That mix affects fire behavior: the sturdy, noncombustible exterior slows exterior flame progression and helps keep the shell intact for a time, but the interior wooden framework provides a ready fuel source that can drive rapid interior fire growth and reach concealed spaces quickly. This differs from all-noncombustible types (where interior structures are also noncombustible) and from types where timber is used for the interior (heavy timber or all-wood), which change how quickly interior fire develops and how the building behaves under fire.