A platform assembly for supporting one or more cabinets includes a first rail having a generally z-shape in cross-section, a second rail having a generally c-shape in cross-section and extending generally parallel to the first rail, and a plurality of connector rails coupled to and extending generally transverse to the first and second rails. End rails are also coupled to respective terminal ends of the first and second rails. The first and second rails are made of metal so that at least the first rail provides a metal toe-kick below the one or more cabinets.