57-Story Skyscraper Built in 19 days!

Broad Sustainable Building, a construction company in China, recently built a 57-floor, 2-million-square-foot skyscraper in just 19 days. That is an average of three floors per day. The building has 19 10-meter-tall atriums, enough office space for 4000 people and 800 apartments. The structure is made up of prefabricated sections that reduced the use of concrete by 15,000 trucks, which translates into less dust released into the air.

The company’s original proposal was for a 220-story structure that would have been the world’s largest skyscraper, however, construction was halted after 20 stories were complete, so that local officials could review the plans. The overall height had to be reduced due to the building's proximity to the local airport. The 19 day build time stands, though, as they have added the time to finish the first 20 stories to the time to build the final 37 stories.