Source:  earthsky.org

Broad Group, a construction company in China, has announced it will built the world’s tallest skyscraper in just 90 days. Plus, says Broad Group, its building will be much cheaper to build than the Burj Khalifa in Dubai (United Arab Emirates) which is currently the world’s tallest manmade structure at 830 meters (2,723 feet).

Broad Group’s Sky City One – which will be located in the city of Changsha, Hunan in south-central China – will be 838 meters tall. In contrast to the Burj Khalifa, which cost $450 per square foot to build, Sky City One will cost $63 per square foot.

Broad Group’s secret? Prefabrication. About 95 percent of Sky City One will be put together in modular form before work commences on site.

Given government approval (which is still pending), Sky City One could be completed as early as January 2013, according to Broad Group, after 90 days of assembly. When completed, Sky City One will have living space for 174,000 people on 220 floors – 1 million square meters (11 million square feet) of floor space – with 104 elevators.

The projected cost for Sky City One is $628 million (US). That’s in contrast to the Burj Khalifa, whose total cost was about $1.5 billion (US). And all in one-twentieth of the time that the Burj Khalifa took to build, according to Broad Group.

But the Burj Khalifa in Dubai has Sky City One beat in one way. It was featured in the movie “Mission Impossible Ghost Protocol.” Remember that really tall building? Yep. That was it.

Bottom line: A Chinese construction company called Broad Group says it will built the world’s tallest skyscraper in just 90 days – for much less cost – the Burj Khalifa in Dubai, currently the world’s tallest manmade structure. The builders will accomplish this using prefabrication, building modules on the ground before assembly of the skyscraper begins. More info

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