Static structures (e.g. – buildings) – Compound curve structure – Hyperbolic parabloid shape
Patent
1987-12-28
1989-08-22
Raduazo, Henry E.
Static structures (e.g., buildings)
Compound curve structure
Hyperbolic parabloid shape
52 63, E04B 132
Patent
active
048583979
ABSTRACT:
An air-inflated fabric roof of hyperbolic paraboloidal shape including a cable network therein and covering a building or other structure, or a part of a building such as an atrium. The building includes an annular rigid outer structure enclosing an inner area covered by the air-inflated hyperbolic paraboloidal fabric roof having the cable network therein. A pressurization system maintains the building interior at a predetermined pressure above ambient atmospheric pressure to inflate the fabric roof. The cable network includes a rigid, continuous ring member connected to the annular rigid outer structure. A first set of cables extends across the central opening of the ring member in parallel in a first or X direction. A second set of cables extends across the central opening in parallel in a second or Y direction substantially perpendicular to the first direction. The cables are tensioned so that their points of intersection lie in a hyperbolic paraboloidal surface having the general equation ##EQU1## Two tie cables extend diagonally across the central opening of the ring member and lie in the Z=O plane. The fabric material is fastened to the cable network. The hyperbolic paraboloidal cable network provides support for the fabric roof even in the absence of air pressurization or in the presence of large loads on the roof, for example a heavy layer of snow.
REFERENCES:
patent: 2912940 (1959-11-01), Baroni
patent: 3137097 (1964-06-01), Zeinetz
patent: 3772836 (1973-11-01), Geiger
patent: 4320603 (1982-03-01), Kirschen
Raduazo Henry E.
Rhodes James A.
Smith Creighton
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