6th European Workshop on Structural Health Monitoring. Dresden. Germany. 2012. Report. A semi-analytical solution for the propagation of guided waves generated by external forces and surface tractions due to piezoelectric actuators along a semi-infinite strip is presented. The paper proposes the use of the discrete layerwise theory for modeling the displacement field through the thickness of the strip and uses a double Fourier transform for the solution of the problem in the frequency-wavenumber domain. Solutions are first presented for a healthy strip with various laminate configurations. Subsequently, solutions for a damaged strip with various sizes of a delamination crack are shown and compared with the healthy response, in order to have an estimation of the effect of damage on the wave characteristics.