Static structures (e.g. – buildings) – With component having discrete prestressing means – Beam – girder – or truss construction
Patent
1988-04-01
1989-03-07
Friedman, Carl D.
Static structures (e.g., buildings)
With component having discrete prestressing means
Beam, girder, or truss construction
52335, 52448, 52450, 52745, E04C 310
Patent
active
048094749
ABSTRACT:
A method of making a prestressed floor slab unit and floor system is disclosed involving the steps of creating a slab unit by imposing a first concrete slab over the central longitudinal portion of a corrugated cold formed steel deck sheet of generally rectangular shape, with the side edges of the sheet remaining exposed. The slab can be prestressed by conventional means by stressing tendons extending longitudinally through the concrete, to create an upward camber to the finished slab. A plurality of these finished slabs are then placed side by side to span the distance between spaced supporting beams. The side edges of the deck sheets are interlocked together by interlocking surfaces on the side edges to form empty trough portions. A second concrete slab is then poured over a plurality of the assembled slab units to fill the empty trough portions and to provide an additional slab layer over the concrete slabs of each slab unit. The weight of the additional slab layer preferably will remove the upward camber of the individual slab units. The apparatus of this invention involves the structure of the above described slab units and the completed floor system.
REFERENCES:
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patent: 4453364 (1984-06-01), Ting
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Friedman Carl D.
Iowa State University & Research Foundation, Inc.
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