![]() Plans to convert it to a space and science center were put on hold with the discovery in 2003 that the structure was leaking toxic chemicals into the sediment in wetlands bordering San Francisco Bay. by the National Trust for Historic Preservation. On May 20, 2008, Hangar One was listed as one of the 11 most endangered historic places in the U.S. On February 24, 1994, the Shenandoah Plaza National Historic District, including Hangar One, was accepted into the National Register of Historic Places. They were also destroyed during World War II. Īnother remarkable example of a similar concrete construction are the two airplane hangars for the Italian Air Force in Orvieto, Italy, by Italian architect and structural engineer Pier Luigi Nervi, designed in 1935 and built in 1938. They were designed and built in 1921–1922 by French structural and civil engineer Eugène Freyssinet, the major pioneer of prestressed concrete, and destroyed in World War II. An outstanding example are the two hangars d'Orly for dirigibles at Orly Air Base near Paris. Other historic references date back to Europe. These two airships were 785 feet (239 m) in length. The first two airships to be constructed and launched at the Goodyear Airdock were Akron and its sister ship, Macon, built in 19, respectively. It provided an unusually extensive room for the construction of "lighter-than-air" ships (airships, dirigibles, or blimps). At the time the Goodyear Airdock was built, the structure, located in Northeast Ohio, was the largest building in the world without interior supports. Hangar One is similar to the Goodyear Airdock in Akron, Ohio which was built by the Goodyear Zeppelin Corporation in 1929. The "orange peel" doors, weighing 200 short tons (180 metric tons) each, are moved by their own 150-horsepower (110 kW) motors operated via an electrical control panel. The clam-shell doors were designed to reduce turbulence when Macon moved in and out on windy days. Its walls curve inward to form an elongated approximate catenary form 198 feet (60 m) high. The building has an aerodynamic architecture. The airship hangar measures 1,133 feet (345 m) long and 308 feet (94 m) wide. ![]() The floor covers 8 acres (32,000 m 2) and can accommodate six 360-by-160-foot (110 by 50 m) American football fields. ![]() It rests firmly upon a reinforced pad anchored to concrete pilings. Karl Arnstein, Vice President and Director of Engineering for the Goodyear Zeppelin Corporation of Akron, Ohio, in collaboration with Wilbur Watson Associates Architects and Engineers of Cleveland, Ohio, Hangar One is constructed on a network of steel girders sheathed with galvanized steel. Designed by German air ship and structural engineer Dr.
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