Which construction type would you classify as exterior walls and interior walls made of approved non-combustible or limited combustible materials, with interior structural members of solid or laminated wood?

Which construction type would you classify as exterior walls and interior walls made of approved non-combustible or limited combustible materials, with interior structural members of solid or laminated wood?

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

Answer: (A)

This item tests how construction types are defined by the materials used for walls and structural members. The described configuration—exterior walls and interior walls made of approved noncombustible or limited combustible materials, with interior structural members that are solid or laminated wood—fits heavy timber construction, known as Type IV. In this type, the load-bearing frame is wood (solid or laminated), while the walls surrounding the building are noncombustible or limited combustible to control fire spread and meet fire-resistance requirements. This combination distinguishes Type IV from others: Types I and II have fully noncombustible structural frames, and Type III typically uses noncombustible exterior walls but may allow interior wood in ways that don’t mandate wood interior structural members.

This item tests how construction types are defined by the materials used for walls and structural members. The described configuration—exterior walls and interior walls made of approved noncombustible or limited combustible materials, with interior structural members that are solid or laminated wood—fits heavy timber construction, known as Type IV. In this type, the load-bearing frame is wood (solid or laminated), while the walls surrounding the building are noncombustible or limited combustible to control fire spread and meet fire-resistance requirements. This combination distinguishes Type IV from others: Types I and II have fully noncombustible structural frames, and Type III typically uses noncombustible exterior walls but may allow interior wood in ways that don’t mandate wood interior structural members.