A method of installing distribution systems such as needed piping, ductwork, electrical wiring, and other systems in a new construction having a structural ceiling and floor, comprises the steps of: providing a frame module of main and cross frame members; assembling the modules on site directly below the final placement position; installing ductwork, piping, electrical wiring, and other distribution systems in the modules; fabricating and attaching upper wall portions to the modules; lifting modules with attached upper wall portions towards the structural ceiling; attaching support columns to the structural ceiling and floor; and mounting the modules onto the support columns, such that the support columns support the modules.