This structure is a complete box with tilt-up walls.Ĭircular church building with folded plate roof The edge members are supported at the center to avoid excessive deflections on the relatively shallow upturned edge elements. This is a single element with glass walls on three sides. Note the steel columns to support the edge members and reduce their size. The span is about sixteen feet and the thickness at the ridge and crown is eight inches tapering to three inches in about five feet. The slab elements on this roof are haunched. The rear rib is supported by columns, and the front rib is essentially an arch supported at the abutments, and at the crown, laterally, by prestressing cables running across the top of the shell.
This structure is a cylinder, square in plan. Each element was formed by four bowstring trusses which could be reused for a typical bowstring industrial building.Ĭonstruction view of small hangar for business airplane Movable forms were used and units were four elements wide. There are no interior ties at the springing of the domes and thrusts are carried by diagonal braces at the exterior. and are there four elements in one direction and nine in the other. These translation domes are each about 40 feet square. The edge plates are small because they are supported by columns. North light is achieved in this roof structure by truss elements cast in the plates.
The folded plates are the typical two-element construction. The projections of the shell beyond the walls do not have any roofing to show that the thickness of the shell is small. The upturned shell at the entrance is supported at the middle by columns so it does not have to span the entire 40 feet, and can be made smaller.
#FELIX CANDELA RIB ROOF WINDOWS#
This structure has a clear span of 40 feet with large windows for north light on work surfaces. The roof thickness is 3 inches, except for the ribs. The structural ribs, however, are on square plan. This is to avoid the box like roof of a square roof plan. In plan, the structure is not square but has eight sides, so the length of the top rib is roughly the same length as the sloping side ribs. square, and is supported on steel tripod elements. This roof in this construction picture is about 185 ft. Hyperbolic Paraboloid Roof for Entertainment Center The supports at the ends of the elements are arranged to make it appear that the roof floats on its supports. There are two spans of about 50 and 60 ft. There are windows between the tilted Z shaped elements to provide overhead natural light. Shells are ideal for bakeries because of the hard surfaces and few horizontal surfaces to catch dust.įolded plate roof for gymnasium and cafeteria
There are no horizontal ties at the columns. The shell was formed with a fixed form at the small circle at the columns and a movable form for the large circle. A unit is composed of two circular elements as shown. This roof system has multiple bays in each direction. The concrete on the steep slopes was placed by the shotcrete method. This construction view shows the steel ties to connect the springs of the triangular arches that will subsequently be concealed by the colored glass brick filler walls. This structure is unique in that the longitudinal central ridge is lower than the peak of the arches. Hyperbolic paraboloid for church in Boulder Colorado
Various designers have been able to achieve with this medium. This web page is designed to be a scrapbook of photos of thin shell concrete structures, to show what Mark Ketchum's Concrete Shell Photo Gallery
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