Foundation (engineering)
Foundations are designed to have an adequate load capacity depending on the type of subsoil/rock supporting the foundation by a geotechnical engineer, and the footing itself may be designed structurally by a structural engineer. The primary design concerns are settlement and bearing capacity. When considering settlement, total settlement and differential settlement is normally considered. Differential settlement is when one part of a foundation settles more than another part. This can cause problems to the structure which the foundation is supporting. Expansive clay soils can also cause problems.
Foundation (United States law)
In the United States, an entity with "foundation" in its name is generally expected, in most cases, to be a charitable foundation. Nonetheless, an organization may have the word "foundation" in its name and not be a charitable foundation—though state law may impose restrictions. For example, Michigan permits its use only for nonprofits with "the purpose of receiving and administering funds for perpetuation of the memory of persons, preservation of objects of historical or natural interest, educational, charitable, or religious purposes, or public welfare." The distinction between charitable organizations and non-profit organizations elaborates on this point.