In ordinary construction, exterior walls are typically made of which material?

• A. Wood
• B. Masonry
• C. Steel
• D. Stucco

Answer: (B)

Exterior walls in ordinary construction are typically masonry, such as brick or concrete block, because these noncombustible walls provide a strong, fire-resistive envelope for the building. In this construction type, the interior framing is often wood, but the exterior boundary relies on durable masonry to resist weather and fire. Wood is common in wood-frame construction, where exterior walls are built from wood studs with siding. Steel appears in buildings with steel framing, where exterior walls may be curtain walls or panels rather than traditional masonry. Stucco is a finish that can be applied over various wall assemblies (masonry or wood frame), but it isn’t the primary exterior wall material by itself in ordinary construction.