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.
Private foundation (United States)
A private foundation is typically set up as a non-profit corporation that bears the name of its donors, but may alternatively be established as a trust. Donors specify the charitable purpose of the foundation (example: grants for cancer research, scholarships for the needy, support of religious goals) . During their lifetime, they may continue their charitable giving by making tax deductible contributions to the foundation. The foundation may also be funded with a bequest from the donors' will or trust or receive funds as the primary or secondary beneficiary of a qualified plan or IRA.The IRS reports that there were 115,340 private foundations in the U.S. in 2008, of which 110,099 were grantmaking (non-operating) and 5,241 were operating foundations. Approximately 75% of the private foundations file annually with the IRS.