Title:
Hypar Recreational Complex Built
Under Football Field
Author(s):
Daniel F. Tully
Publication:
Concrete International
Volume:
1
Issue:
8
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;
placing; post-tensioning.
DOI:
Date:
8/1/1979
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.