What is a common requirement for footings in excavation?

A common requirement for footings in excavation is that they must have a level finish grade. This is crucial because a level footing ensures that the structure built upon it will redistribute weight evenly, reducing the risk of settling or structural failure. When footings are not level, it can lead to uneven stress on the structure, which may cause cracks, heaving, or other serious issues as the building settles over time.

While the other options may touch on various aspects of excavation and construction practices, they do not highlight the importance of a level finish grade like the selected answer does. For example, while digging deeper than surrounding areas might sometimes be necessary, it doesn't address the specific requirement for the footings itself. Leaving the surface rough is inappropriate for footings since a smooth, level finish is vital for effective load distribution. Lastly, while some aspects of excavation might not require strict inspections, footings typically must be inspected to confirm they meet construction standards, particularly since they are foundational to the integrity of the entire structure.