A Dymaxion Deployment Unit (DDU) is a structure designed in 1940 by Buckminster Fuller consisting of a 20-foot circular hut constructed of corrugated steel looking much like a grain bin. The interior was insulated, finished with wallboard and port holes.
The Army Signal Corps commissioned Fuller in 1942 to develop 200 units as quickly as possible. The units were manufactured by the Butler Manufacturing company and were deployed all around the world prior to the US entry into World War II. The cost of each unit at the time was $1,250. When the US entered World War II, a steel shortage ensued which resulted in the eventual cancellation of DDU production.
At Fort Monmouth, New Jersey, a DDU resides prominently on the roof top of Meyer Center.