The purpose of foundation are

1) To support the structure.

2) To distribute load of the entire structure over a wide spread area, so that the chances of unequal settlement are minimized.

3) To increase the stability of the structure.

4) To provide a leveled surface for super structure.

5) To provide the structural safety to super structure against scouring due to animals, flood water etc.

6) To prevent or minimize the cracks due to movement of moisture in case of weak or poor soils etc.