Abstract: A prefabricated building module comprising at least two side-walls, a ceiling, and a floor. In one embodiment of the building module, the walls, ceiling and floor each include a thin, continuous layer of a concrete-like material having spaced-apart, open web bar girders embedded in one surface thereof. The two side-walls, the ceiling and the floor are assembled together with the bar girders extending outwardly and are rigidly attached to one another, for example, by welding the ends of the bar girders to one another, thus forming a rigid, box-like building module. The building modules can be formed into a building by placing one layer of building modules with one side-wall of each module adjacent to but spaced-apart from one side-wall of a different module.

Abstract: A prefabricated building module comprising at least two side-walls, a ceiling, and a floor. In one embodiment of the building module, the walls, ceiling and floor each include a thin, continuous layer of a concrete-like material having spaced-apart, open web bar girders embedded in one surface thereof. The two side-walls, the ceiling and the floor are assembled together with the bar girders extending outwardly and are rigidly attached to one another, for example, by welding the ends of the bar girders to one another, thus forming a rigid, box-like building module. The building modules can be formed into a building by placing one layer of building modules with one side-wall of each module adjacent to but spaced-apart from one side-wall of a different module.