Which statement describes a concern associated with perimeter foundations?

• A. It creates a crawl space which can allow for the easy extension of fire, and greatly increases the risk of floor collapse.
• B. It eliminates crawl space and reduces fire risk.
• C. It strengthens the foundation against earthquakes.
• D. It prevents moisture buildup.

Answer: (A)

Perimeter foundations with crawl spaces create a vulnerability: the crawl space can serve as a fuel source and a pathway for fire to spread into the structure, while heat and flame progressively weaken the floor framing and support members. That raises the risk of floor collapse as the fire progresses. The other statements don’t fit because eliminating a crawl space isn’t inherent to perimeter foundations, and fire risk is not automatically reduced by their use. Earthquake resistance and moisture outcomes depend on the overall design and conditions, not a guaranteed feature of perimeter foundations.