Static structures (e.g. – buildings) – With component having discrete prestressing means – Beam – girder – or truss construction
Patent
1988-07-08
1990-04-03
Ridgill, Jr., James L.
Static structures (e.g., buildings)
With component having discrete prestressing means
Beam, girder, or truss construction
52283, 52432, 52259, 52263, E04C 310
Patent
active
049128965
ABSTRACT:
This invention relates to a pre-cast, prestressed hollow core beam unit for use in a two-way building system and is adapted to be supported in continuous spanning relationship on two or more building supports. The beam unit has floor panel supports along opposite edges thereof, and comprises an elongate, continuous body of pre-cast, prestressed concrete having a plurality of hollow cores extending longitudinally throughout its length, with the hollow cores being selectively openable through the top surface of the beam unit to vary the design characteristics of the beam unit. In use, at least one of the hollow cores is opened through the top surface of the beam unit along at least a portion of its length, preferably at a point of high stress where the beam rests on a support, for example. Building reinforcing material is secured within the open portion of the beam unit and extends above the top surface of the beam unit to be received in and bonded to a layer of cement or like building material laid over the beam unit and any floor panels supported thereon, defining a composite action, continuous, monolithic beam structure extending continuously between building supports.
REFERENCES:
patent: 938458 (1909-11-01), Brockhausen
patent: 2751776 (1956-06-01), Streblow et al.
patent: 3172932 (1965-03-01), Vander Heyden
patent: 3283457 (1966-11-01), Hart
patent: 3918222 (1975-11-01), Bahramian
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