Chattanooga company hopes to break ground on 3-D-printed house this year

  3-D printing in architecture is growing—literally. Once limited to models and small pieces, the technology has recently been adapted to large-scale projects, like the world’s largest 3-D-printed concrete bridge in Shanghai, a stainless steel bridge in the Netherlands, and walls for U.S. military barracks. An Austin-based company has even begun selling plans for 3-D-printed