Coastal and Floodplain Construction Inspector's Practice Exam

The top of any exterior foundation on graded sites must extend above the elevation of the street gutter a minimum of how many inches?

1. A. 8 inches plus 2 inches

2. B. 10 inches plus 2 inches

3. C. 12 inches plus 2 inches

4. D. 14 inches plus 2 inches

The correct answer is: C. 12 inches plus 2 inches

For graded sites, the requirement that any exterior foundation must extend above the elevation of the street gutter is critical for preventing water infiltration into the building. The standard specifies that the top of the foundation should be at least 12 inches above the gutter level to ensure adequate drainage and to mitigate the risk of flooding or moisture issues in the structure. This height helps direct water away from the foundation and reduces the likelihood of standing water, which can lead to deterioration and other structural problems. The additional 2 inches indicated in the answer reflects a safety buffer that is often incorporated into construction practices to accommodate potential variances in grading, soil settling, or other unforeseen conditions that could affect drainage and foundation stability. This total of 14 inches ensures that there is a suitable measure of elevation to protect the integrity of the building from surface water. Therefore, the correct answer highlights the importance of adhering to these elevation standards for maintaining the longevity and safety of structures built on graded sites.