Every house must have a foundation as the power to the home. The foundation is one of the most vital structural elements of a building construction, since the foundation in charge of most late in shouldering all the burden of the building to be forwarded to the ground. If compared in business, the foundation is a division of “negotiation”, “public relations”, or “marketing” of a structure in order to be accepted by the ground aka earth where rests. Where there dipijak earth upheld the sky, so less so :).
So that the structure can be received by the soil, the foundation in charge of adjusting the type of approach to the ground by conducting a survey of the characteristics of the land, such as sondir test to determine the soil bearing capacity.