Curbed NY has taken a thoroughly in-depth look at B2, one of three residential towers set to rise in the Atlantic Yards multi-use complex in Brooklyn. When complete (an expected 18 months after groundbreaking early next year), the 350-unit condo building, split between affordable and market-rate housing, will measure 32 stories high, making it the tallest prefab edifice in the world. Designed by SHoP architects with engineering by Arup, the structure will consist of "930 steel chassis modules around a lateral system of steel braced frames, with all the connections on the exterior of the modules, a method the developer [Forest City Ratner] describes as 'process, not product innovation.'" So, why modular? The team found that in the case of this 340,000-square-foot structure, the pre-cast option will cost 15 to 20 percent less than traditional building and produce as much as 90 percent less waste. Curbed NY has more renderings.