What is the required slope of ground adjacent to a residential structure?

The required slope of ground adjacent to a residential structure is typically set to ensure adequate drainage away from the foundation, which is crucial for preventing water accumulation and potential damage to the structure. The specification of a slope of 6 inches for a minimum distance of 10 feet indicates that for every 10 feet away from the foundation, the ground should drop 6 inches.

This slope helps to effectively direct rainwater and surface runoff away from the foundation walls, thereby minimizing the risk of moisture penetration and foundation instability. A sufficient slope is important in preventing issues such as flooding, mold growth, and deterioration of the building's structural integrity over time.

The other options suggest different slopes and distances, but they do not conform to common practices regarding the necessary drainage away from residential structures. A slope of 6 inches over 10 feet is recognized as a balanced approach that steers clear of excessive runoff while still being practical for landscaping and construction purposes.