Investigations on pressure variations and free surface displacements of liquid from the mean static level in a cylindrical tank have been carried out experimentally. The primary objectives of this study are to investigate the sloshing problem in a rolling cylindrical tank and to measure pressure distributions at different locations. For this purpose, an experimental setup is designed to study the non-linear behaviour and damping characteristics of liquid sloshing in a partially filled cylindrical tank. Several configurations of tanks with and without damping walls are studied. Hydrodynamic load variations on the cylindrical tank are investigated by changing the filling ratio, the rolling period and the rolling angle systematically.