Static structures (e.g. – buildings) – Compound curve structure – Hyperbolic parabloid shape
Patent
1992-04-20
1994-07-26
Safavi, Michael
Static structures (e.g., buildings)
Compound curve structure
Hyperbolic parabloid shape
52 813, 52469, 52483, E04B 708, E04D 136
Patent
active
053317807
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to an improved hyperbolic paraboloid roof system.
A hyperbolic paraboloid roof is a configuration which has esthetic, structural and economic advantages for many purposes, such as inexpensive, attractive, large area structures free of intermediate columns, as for example, hangers, auditoriums and gymnasiums.
My prior U.S. Pat. No. 3,958,375 describes a hyperbolic paraboloid roof section made in prefabricated portions, each of which has a joining edge parallel to the joining edge of another prefabricated portion. The fastener means adjacent to the joining edges are provided by steel plates tied together by bolts. The present invention is an improvement on my prior patent.
Prior to my patent, hyperbolic paraboloid roof structures were customarily assembled piece by piece on the site by cutting, fitting and assembling the various portions of the roof. Thus, Peeler, U.S. Pat. No. 3,094,812, describes a precast, concrete element which in itself is flat and is assembled in multiples on steel rods or cables running through the elements both longitudinally and transversely to form a support network. Charles, U.S. Pat. No. 3,186,128, shows the construction of a hyperbolic paraboloid roof in a panel by panel construction of small sheet metal panels attached to one another, edge to edge, with waterproof joints, requiring a frame. British Pat. No. 1,019,362 (1966), describes a hyperbolic paraboloid roof which is assembled by having one layer of relatively small panels running in one direction followed by another layer of panels running in another direction. Hyperbolic paraboloid roofs have also been made by steel framing with reinforced concrete and by piece by piece assembly of wooden components.
One object of the present invention is to provide a prefabricated hyperbolic paraboloid roof section with joints which eliminate the need for bolts, shear plates and ring connectors.
Another object of this invention is to provide edge members (beams) which are universal in application, thus eliminating left or right handed beams.
Yet another object of this invention is to provide a non-metallic or non-ferrous fastening system which can be used in areas requiring a non-metallic or non-ferrous environment.
Still another object of this invention is to provide a less expensive system for constructing hyperbolic paraboloid roofs.
Further objects and advantages of this invention will be apparent from the description and claims which follow, taken together with the appended drawings.
SUMMARY OF INVENTION
The invention can be best understood by reference to a description of the principal sequence of steps for the erection of the building. The first step is the construction of concrete foundation walls and abutments. At each low working point are then installed edge beam connections at the proper location. After work points in space at proper locations and elevations have been established by the engineer, perimeter edge beams are then installed, the beams being connected to the foundation and to a portion of another beam extending from the foundation. Interior edge beams are then connected and installed. This complex of connected beams comprises the frame of the roof. The present invention is primarily concerned with the fabrication and installation of the roof sections shaped to fit and be supported by these beams. However, such sections can also be oriented so as to serve as sidewall sections. Such roof sections, are hereinafter referred to as the roof shell sections. After the roof shell sections have been installed, as hereinafter explained, a variety of finish and cover materials can be installed by conventional or previously described methods.
Where a material such as laminated wood, e.g. plywood, is used in fabricating the roof shell section, it is preferred to use at least three layers of the material. One layer runs in a different direction than other layers. Other materials which can be used include steel, fiberglass and concrete precast or formed in place.
The present
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Safavi Michael
Zallen Joseph
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