Title: Lightweight building module

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Abstract: Design, fabrication and erection of a lightweight building module in the form of a ribbed concrete floor slab with lightweight thin concrete wall panels and ceiling panel reinforced by a series of spaced rigid annular open web frames. Each frame includes a floor reinforcing member, two side wall reinforcing member, and a ceiling reinforcing member, rigidly welded together at their adjacent ends. Each reinforcing member is an open web joist having two parallel straight rods spaced apart by an open web member formed by bending a rod in a zig-zag pattern. Longitudinal spacing of adjacent bends is greater in the central portion than the ends of the reinforcing members. A poured concrete roof slab is formed with integral reinforcing ribs by means of rectangular spacers made of light weight material. The modules may be installed at a building site by distributing a layer of thin mortar over compacted earth and placing each module thereon before the mortar hardens, so that the weight of the module is evenly distributed by the mortar pad. A cross-bracing feature for multiple story buildings improves the strength, rigidity and stability of the total structure.


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