The company’s original proposal for the site was actually a 97-storey building that would have been the world’s largest skyscraper. But just after 20 stories were completed, construction work was stopped for one year because local officials wanted to review the plans. Ultimately, they had to reduce the plan to 57 stories due to the building’s close proximity to the airport. In spite of the major delay, the entire construction from start to finish was completed in less than three weeks of work.
A 4-minute clip posted on YouTube shows employees building each storey offsite and delivering it to the location. A timelapse sequence shows the assembling of the mammoth building which required a total of 19 days to complete – that’s exactly three floors per day!
The use of modules in Sky City reduced the use of concrete by 15,000 trucks, which pretty much eliminated dust pollution of the surrounding air. They also claim that the air inside Sky City is 99.9 percent pure because of the tight construction and built-in air conditioning system. The building’s quadruple-pane glass is so energy efficient that it will save 12,000 tons of carbon dioxide emission, compared to any other building of the same size and use.