The supersizing of printer technology could significantly extend the limits of concrete. By adapting technologies similar to those used in ink-jet and 3D printers and rapid prototyping machines for large-scale use, researchers in the U.S. and the U.K. are developing automated systems capable of rapidly constructing houses and other structures. Photography courtesy of Loughborough University (top and above left). Renderings: University of Southern California (above right and below) Plans by USC researchers include a simple gantry (below) for constructing a house, as well as a combination scaffold/ gantry for high-rises (above right). Loughborough University’s gantry (above left) could eventually produce