Broad Group of China completed a 57 story high rise in 19 days

Broad Group has a timelapsed video of a 57-floor 2-million-square-foot (180,000-square-meter) skyscraper fully built with energy-efficient and factory-produced components.

The building is about 200 meters tall. This is officially classified as a skyscraper.

Skyscraper is often used for buildings higher than 150 meter (492 ft). For buildings above a height of 300 meters (984 ft), the term Supertall can be used, skyscrapers reaching beyond 600 meters (1,969 ft) are classified as Megatall

Broad Sustainable Building (BSB) Architect Xian Min Zhang has released a time-lapse video of the construction of J57. The J57 represents a smaller prototype for a 205 story building that they plan to build. It is called the Sky City.

The J57 building has 19 atriums of 10 meters’ height each, 800 apartments, and office space for 4,000 people. Zhang claims that the use of its modular construction technique, which won a CTBUH Innovation Award in 2013, reduced the use of concrete by 15,000 trucks, which he says has nearly eliminated all the dust that would normally be released during conventional construction, an important advantage in pollution-ridden China. Zhang also says that all of the air inside the building is 99.9 percent pure, thanks to the tight construction and built-in air conditioning system. BSB’s parent company, Broad Group, manufactures air conditioners, air purifiers and other similar products.

Broad Group did complete a couple of high rise buildings in 2014.

The premier project of a 202 story building. The 57 story building was on hold but is now completed

The same “95%-prefabricated modular technology” as Sky City was being used for the J57. Initially it was planned for 97 stories and accordingly named J97, the building was revised to 57 stories in 2014. They have completed about 20 stories but were forced to stop.

A January 2014 Interview talked about an August start of the SkyCity but that appears to not have happened

SOURCES – Youtube, Gizmodo, Ctbuh