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)
The Tax Reform Act of 1969 defined the fundamental social contract offered to private foundations. In exchange for exemption from paying most taxes and for limited tax benefits being offered to donors, a private foundation must (a) pay out at least 5% of the value of its endowment each year, none of which may be to the private benefit of any individual; (b) not own or operate significant for-profit businesses; (c) file detailed public annual reports and conduct annual audits in the same manner as a for-profit corporation; (d) meet a suite of additional accounting requirements unique to nonprofits.