Abstract: A prefabricated curtain-wall system comprises an assembly of reinforced concrete panels. The reinforcement of the concrete is provided by a grid of horizontal and vertical metal rods, tied together where they cross. Connection between two adjacent panels utilizes an external bracket with two bolts, each bolt mating with a nut protruding from a slotted bracket embedded in each of two adjacent panels The embedded brackets have eyelets for passage of a rod of the reinforcing grid. The lowermost panels of the system are anchored to the building foundation, thus the load of the entire curtain wall system and the embedded reinforcing grid can be transmitted to the foundation. The system incorporates means of adjusting the fitting together of panels to compensate for minor deviations in the dimensions and elevations of construction elements.

Abstract: Prefabricated reinforced stackable concrete panels are provided for forming walls and roofs of multi-story buildings. Each panel has an embedded grid of vertical and horizontal steel rods secured together where they cross. The grid is anchored by brackets welded to a base plate along the bottom of each panel, and to another plate along the top. Leveling means (screw jack devices) are anchored to the top plate. At ground level the base plate of each prefabricated panel is welded to an elongated plate embedded in the concrete foundation. A second story is formed by stacking panels on a floor pan anchored to the leveling means of the first story panels, and a pour of concrete completes the inter-story floor, embedding the leveling means. Successive stories and roof panels may be added and anchored to the stories below in the same manner, creating an exceptionally strong structure of up to six to eight stories, firmly anchored to the foundation by the tying together of the reinforcing grids of the stacked panels.