A detailed study has been conducted on the effect of different types of thickness profile on the response of a beam. In order to be able to make a general comment, the study has been extended to include two higher modes. In addition, three boundary conditions, namely, clamped at both ends, simply supported at both ends, and one end clamped and the other free, have been studied for uniformly distributed sinusoidal load and point sinusoidal load. The results obtained for different thickness profiles are compared with those obtained for parallel beam. © 1992.