Photo: K.Schorn, 2008
The oldest known concrete shell structure: the Pantheon, Rome
Completed approximately AD 125
Diameter = 141ft (43m)
Photo: www.ketchum.org
Petroleum Coke Bulk Storage: Pittsburg, California
Designed by OPAC Consulting Engineers, 1997.
Air formed, built by Dome Systems, Inc.
Hemisphere diameter: 180ft (55m)
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