Each module is monolithically cast and consists of two 70-square-foot cells with a mechanical chase between them for utilities connections. The 4-inch ceiling slab of each module is the floor for the module stacked on top of it. Electrical conduit for junction boxes and lights is cast into the cell as are openings for plumbing and ductwork for heating and airconditioning. Door and window openings are also precast, along with mounting plates for bunks, a seat, and a desk. The cells are constructed with cantilevered interior balconies between floors and between elevators and stair towers; roofs are prestressed double-tee concrete panels. Other trades complete the installation of furniture and fixtures, doors, plumbing, electrical connections, and railings along the balconies of the upper floors. The Greensville Center will open in phases. The total construction time of all buildings will be just under a year, approximately half the time of conventional construction.