My entries focused on quonset hut
The Navy Seabees developed Quonset huts from the semi cylindrical British Nissen hut design by adding wooden lining, insulation and tongue and groove wooden flooring. They proved indispensible as lightweight, portable troop and equipment housing able to be quickly assembled in the field with just a set of hand tools. In fact, they were so successful that some soldiers purchased surplus Quonset huts after the war for their own housing, and universities purchased them for use as student housing. You can still see some of them in use today. The initial Quonset huts design included arched steel rib members constructed in a T design and supported by wooden purlins.