DESIGN IS BASED ON THE BEARING CAPACITY OF THE SOIL.

RCC FOOTINGS AND FOUNDATIONS :-- RCC footings are provided to transmit the load of the structure supported by columns or walls to the soil .The design is based on the assumption that the foundation is rigid so that the variation of pressure under the foundation will be linear.The distribution of pressure will be uniform if the centroid of the footing coincides with the resultant of the applied loads .This conventional method holds good only in case of rigid foundation.Such an assumption becomes less and less accurate as the footings becomes relatively more flexible.The requirements in design of foundation are (1) The pressure on the soil should not exceed the bearing capacity of soil (2) The settlement of the structure should be with in the permissible limits .Further there should be no differential settlement. Wherever the possibility of the differential settlement occurs, the different portions of the structure should be made such as to settle independently of each other. The following types of foundation may be used as per the design criterion and design & scope of the bearing capacity and other conditions at the site of work required to be made provided with the RCC footings (1) Continuous footing for walls (2) Isolated footings (3) Combined footings (4) Strap footings (5) Mat or raft foundations (6) Pile foundations.