from ted
The Burj Dubai by SOM hasn´t been finished yet, but it´s currently the world´s tallest structure. Meanwhile, the Shanghai World Financial Centre by KPF has been opened a few weeks ago, which is (as for now) the tallest building in the world when it comes to roof height with 492m (1,614.2ft). The Taipei 101 in Taiwan is 509.2m (1,670.60ft) if you count the antenna, but its roof is only at 449.2 m..