The Shanghai Tower — the tallest building in China at 2,073 feet — has topped out and put the final beam in place, according to Thornton Tomasetti, the engineering firm that is providing structural services for the building. Designed by architecture firm Gensler and developed by the Shanghai Tower Construction and Development Company, building of the mixed-use, 4.1-million-square-foot structure began back in 2008 and it is scheduled for completion in 2014.