What is a common size for footings if the foundation is 10 inches thick?

In the context of foundation construction, footings are crucial for distributing the weight of the structure above them. A common size for footings when the foundation is 10 inches thick is often designed to ensure stability and load-bearing capacity.

Choosing a footing size of 20 inches wide by 10 inches deep aligns with typical standards used in construction, especially in residential foundations. The width of 20 inches provides ample support for the structural load while accommodating factors like soil type and load-bearing requirements. Having a depth equal to the thickness of the foundation, in this case, 10 inches, also ensures that the footing works effectively in conjunction with the foundation, offering a sturdy base that helps to prevent settling and shifting.

Other sizes in the choices may not meet the balance of width and depth necessary to support the structural loads effectively under various soil and load conditions. Therefore, a footing that is 20 inches wide by 10 inches deep is a practical and commonly accepted approach in foundation design.