Ensamble Fabrica is the new prototyping facility and fabrication laboratory of Ensamble Studio in Madrid. Besides serving its purpose as a work place, it is a proof of concept that tests the hybrid steel-concrete construction technology our firm has developed in the past years, meant to innovate the way in which high-rise and long span structures are built, using prefabrication. The building is composed of twelve porticos, has a volume of 58x18x12m (length x width x height) and includes an open, four-story high hangar as well as office and other support spaces.