Glossary of Defined Terms


Adapted From Barnard, Defenses of Washington, Plate 23.Any structure constructed with a roof designed to resist or absorb the impact and explosion of shells was said to be bomb-proof. Bomb-proofing in field fortifications generally required a heavy post and beam framework sunken below the natural level of the ground with a roof covering consisting of one or more courses of large diameter timbers covered by 4 to 6 feet of tamped soil. Powder magazines were generally made bomb-proof; fortifications exposed to enemy shell fire often included bomb-proof dug-outs and shelters where troops occupying a work could retire when under enemy bombardment. Bomb-proofing in permanent fortifications was considered to require masonry vaulted Original Image Courtesy Library of Congressenclosures with arches at least three feet thick that were covered by a layer of tamped soil 3 to 6 feet deep. Free standing magazines, casemates, caponnieres, and other defensive structures within permanent fortifications were generally constructed as bomb-proof structures.

Wheeler, J. B. The Elements of Field Fortifications. Pp. 134-135.

January, 2003

August, 2005