In general, internal cells are required to solve elastic problems with gravity load in non-homogeneous materials using a conventional boundary element method (BEM). However, in this case, the merit of BEM, which is ease of data preparation, is lost. In this study, it is shown that two-dimensional elastic problems with centrifugal load in non-homogeneous materials can be solved without the use of internal cells, using the triple-reciprocity BEM. An body force distribution is interpolated using boundary integral equations. A new computer program was developed and applied to solving several problems.