Piles are usually transferred axial loads from a structure to subsurface soil strata having sufficient bearing capacity. The load transfer mechanism from structure to surrounding soil strata through the pile is complicated. However, the application of piled foundations is in usage over many decades. Mainly, piles are designed considering friction along its shaft and/or the end bearing capacity of foundation soil. Selection of pile foundations requires the subsoil conditions, the load characteristics of a structure, settlement criteria and any other specific requirement of a particular project. Construction of pile foundation demands careful control on position, alignment and depth, and require specialized skill and experience. In this section, we know more about the construction of pile foundation by Rotary Method.