File:NNSA-NSO-558.jpg

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Description PLUMBBOB - 1957 - NEVADA TEST SITE -- A full-size steel door, designed as closure for a dome-type shelter of about 1 50 ft. diameter, will be tested for 35 pounds per square inch side-on overpressure. The prototype door, sponsored by the Federal Civil Defense Administration, is shown in closed position. Operated in the same fashion as a drawbridge, the door drops down into its specially fitted concrete bed, serving as a road or walkway to the shelter. Hinged at the bottom, the door can be designed for manual or power operation.
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This image is available from the National Nuclear Security Administration Nevada Site Office Photo Library under number PLU-57-178.

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Author National Nuclear Security Administration / Nevada Site Office
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Public domain This image is a work of a United States Department of Energy (or predecessor organization) employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.

Please note that national laboratories operate under varying licences and some are not free. Check the site policies of any national lab before crediting it with this tag.

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current00:53, 3 September 2012Thumbnail for version as of 00:53, 3 September 20121,418 × 1,146 (340 KB)Bomazi (talk | contribs){{Information |Description=PLUMBBOB - 1957 - NEVADA TEST SITE -- Circular shelter, sponsored by the West German Government, will be tested under an atomic detonation in Yucca Flat late in August. Shown just before the concrete pour over the formwork...

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