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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Hypar Recreational Complex Built
Under Football Field
Author(s): Daniel F. Tully
Publication: Concrete International
Appears on pages(s): 50-57
Keywords: concrete construction; diaphragms (con-&
e); edge beams; forming techniques; formwork
(construction); hot weather construction: hyperbolic
parabolic shells; loads (forces); mix proportioning;
Abstract:No land being available, the designer created an underground sports facility and placed a football field on top of it for Georgetown University, Washington, D.C. Concrete bearing walls are 85 percent below grade. Covering two clear-span recreation areas, each 130 x 325 ft (40 x 99 m), is a roof of hyperbolic paraboloid shells, eleven of them 65 x 130 ft (20 x 40 m) in dimension. A concrete surface roof slab, overlaid with artificial grass, restored the university’s football field.
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