Earlier this year, Chinese Company Broad Sustainable Building (BSB), announced plans to build the world’s tallest skyscraper in an unbelievable 90 days. Now the build time for the 838-meter-tall tower has been pushed back to more reasonable (if still incredibly speedy) 210 days. Sky City is set to shatter the current record for loftiest building held by the 828-meter-tall Burj Khalifa in downtown Dubai.

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At a proposed height of 220 stories tall, Sky City is set to become the world’s tallest building. Construction is set to begin by November of this year in the Chinese city of Changsha in the province of Hunan, and the project was originally estimated to take only 90 days to complete. However, developer Broad Sustainable Building has now extended the deadline to March of 2013. Even at this pace, Sky City would set a record completion time 9 times faster than the Burj Khalifa, the globe’s current record holder. It will also cost a “mere” $628 million in contrast to Burj Khalifa’s $1.5 billion price tag.

Sky City is designed to provide housing for over 100,000 people while incorporating retail and leisure facilities. The building will total a whopping 1,000,000 square meters of usable space across 220 floors. 104 separate elevators will transport residents up and down the soon-to-be wonder of the world. The structure is designed to be earthquake resistant, and its 15-cm-thick walls are heavily insulated for energy efficiency.

While competitors such as Gensler, who designed the Shanghai Tower, have shown skepticism over BSB’s timetable, the company is certain they can complete the enormous undertaking. If they experience no more delays, Sky City will still be on track to become one of the largest and least expensive skyscrapers in modern times.

Via Arch Daily