Shanghai Tower

The Shanghai Tower is a skyscraper under construction in Lujiazui, Pudong, Shanghai. It was designed by the U.S firm, Gensler.The steel structure will rise to 632 meters wrapped around a 565.6 meters  tall central concrete core. In total it will have 127 stories, a total internal area of 558,806 square meters, including an interior space which will be given over to offices, a luxury hotel and retail.Its tapered, spiral form is a research-based response to high winds in the region, while creating a new icon for this capital of commerce. The construction has started in 2008 and is estimated to be completed in 2014. The Shanghai tower costs an estimated $2.4 bn ( £1.6 bn).

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References:

http://www.skyscrapercenter.com/shanghai/shanghai-tower/

http://www.bbc.co.uk/news/world-asia-23559852

http://construction.about.com/od/Future-Projects/a/Shanghai-Tower-China-S-Tallest-Skyscraper.htm

http://www.archdaily.com/413793/gensler-tops-out-on-world-s-second-tallest-skyscraper-shanghai-tower/

http://www.forbes.com/sites/russellflannery/2013/08/03/chinas-tallest-skyscraper-celebrates-big-step-toward-its-2015-finish/