What is the required height of the top of a foundation above the elevation of the street gutter on a graded site?

The correct height of the top of a foundation above the elevation of the street gutter on a graded site is typically required to be 12 inches plus an additional 2% for any potential drainage concerns. This standard ensures that the foundation is sufficiently elevated to prevent water accumulation near the structure, which can lead to moisture issues, erosion, and potential damage to the foundation.

Having the foundation elevated at this height addresses concerns such as proper runoff and drainage, helping to protect the integrity of the building over time. The additional 2% allows for any slight variations in grade and ensures that water flows away from the foundation effectively, further enhancing the structure’s durability.

This requirement reflects best practices in construction and site development, demonstrating a proactive approach to managing environmental factors that could impact the foundation's stability and longevity.