Coastal and Floodplain Construction Inspector's Practice Exam

What materials should exterior walls be constructed of in flood hazard areas extending below the required elevation?

1. Wood-Frame

2. Flood-Damage-Resistant Materials

3. Steel Reinforced

4. Concrete

The correct answer is: Flood-Damage-Resistant Materials

In flood hazard areas where exterior walls extend below the required elevation, it is essential to use flood-damage-resistant materials. This is primarily because these materials are specifically designed to withstand the effects of flooding, such as prolonged exposure to water and moisture. They help minimize damage and maintain structural integrity even when subjected to flood conditions. Flood-damage-resistant materials typically include concrete, closed-cell foam insulation, tile, and other non-porous materials that do not absorb water, which mitigates the issues associated with mold and decay. Choosing these materials is critical for safety, durability, and compliance with building regulations in areas prone to flooding. Other materials like wood-frame, steel reinforced, or concrete, while they may have their uses in construction, do not inherently possess the necessary properties to resist damage from floods when located below the required elevation. Wood, for instance, can absorb moisture and lead to structural failure, while steel is susceptible to corrosion unless adequately protected. Therefore, using flood-damage-resistant materials is the best practice when constructing exterior walls in these vulnerable areas.