The effects of an earthquake are mainly viewed with the damages caused to the superstructures of an engineering structure alone. Most of the structural studies and designs advanced thereby deal with earthquake resistant construction of superstructures exclusively. But for the earthquake resistant design to be of any practical purpose the structure must be able to withstand the erratic sequence of the ground motion with a factor of economy also. In this context, every detail, which might be the reason for magnifying the damage must be looked into. Herein, the behaviour of soils under pulsating loading conditions is studied. Attempt is made to bring out the importance of soil and foundation in earthquake resistant design and construction.