CAISSON is a Microsoft Windows program for the analysis and design of moment resisting reinforced concrete pier foundations and direct embedment depths for poles. Such piers are typically used as foundations for single tubular steel poles. CAISSON uses ultimate strength design concepts for both the structural design of the pier and its sizing to avoid soil failure. All analysis and design assumptions are described in the User’s Manual which is available upon request. CAISSON does not perform any calculation of deflection under service loads. It does not verify the uplift capacity of the foundation, a condition that may have to be checked when the pole is part of an H-Frame structure. CAISSON is based on classical theory that has not changed in many years and is no longer being actively developed.