The amount of vibrational energy scattering by a rib in a cylindrical shell will depend on the shape of the rib. This redistribution of energy will affect the coupling between the shell vibration and acoustic radiation. Most models treat the rib attachment to the shell as a line attachment. Here, a rib with different widths and shapes is considered. Equations for the structural intensity in an infinite cylindrical shell without and with fluid loading are derived. The rib is treated as a change in the shell thickness specified by a rib function with parameters to control height, width and shape. The effects of the rib on the structural intensity in the in-vacuo shell in the farfield of the rib are modeled as a function of frequency and circumferential mode number.