Patent ID: 8225564

Claim:
A modular building system comprising: multiple portable pre-cast modules, wherein each of the multiple modules comprises: a structural steel mesh; a cementitious mortar encasing the structural steel mesh so as to define a monolithic module body having a plurality of spaced-apart recesses located along one or more edges of the module body, the recesses extending across a thickness of the module body, the structural steel mesh comprising an elongated bar that extends generally parallel to and inward from said one or more edges, the elongated bar having at least an encased portion that is encased in the cementitious mortar that defines the monolithic module body and at least an exposed portion that is exposed and traverses said recesses in a manner generally parallel to and inward from said edges; and one or more metal plate connectors, said metal plate connectors configured for insertion between aligned recesses of adjacent modules and configured to be welded to the exposed portion of the elongated bar in said aligned recesses to fixedly couple the adjacent modules when the modules are placed in contact with each other along at least one of their respective edges so that the recesses on said edges align with each other and the modules are in contact with each other.