Abstract
An equivalent lumped system for analysis of structures founded upon stratum of soil had been proposed by the author and R.V. Whitman (1968) and introduced by R.V. Whitman (1968). A series of laboratory tests has been carried out to check upon the applicability of the proposed approximate system, which show a good agreement with the system from an engineering point of view. Dunkerley's formula has also been applied with respect to the fundamental frequency of buildings on stratum, and checked upon by the laboratory tests.
