Jean Prouve, Prototype of the Demountable Barrack Units for the Engineering Corps of the 5th Army. (1939)
For this project, Prouve made use of a production principle that he had previously employed for the barracks of a young peoples vacation resort in Onville: The barracks’ load bearing structure was a perimeter frame, lined with wooden panels. At the test run for assembling the units, conducted in Berkenwald in Alsace before the general staff, the time needed to build each structure amounted to no more than three hours. The French army ordered 275 of these barracks, but production had to be stopped due to the German invasion.