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Chinese builder puts up 57-story skyscraper in 19 days

Mini Sky City, which has 19 atriums, 800 apartments and office space for 4,000 people, goes on sale in May.

By: Associated Press | Changsha |
Updated: April 30, 2015 1:56:22 pm
In this March 20, 2015 photo, a worker operates machinery at the Broad Sustainable Building Co. in central China's Hunan Province. The Chinese construction company is claiming to be the world’s fastest builder after erecting a 57-story skyscraper in 19 working days in central China. The company put up the rectangular, glass-and-steel Mini Sky City using a modular method, assembling three floors per day, company vice president Xiao Changgeng said. (AP Photo/Peng Peng) In this March 20, 2015 photo, a worker operates machinery at the Broad Sustainable Building Co. in central China’s Hunan Province. The Chinese construction company is claiming to be the world’s fastest builder after erecting a 57-story skyscraper in 19 working days in central China. The company put up the rectangular, glass-and-steel Mini Sky City using a modular method, assembling three floors per day, company vice president Xiao Changgeng said. (AP Photo/Peng Peng)

A Chinese construction company is claiming to be the world’s fastest builder after erecting a 57-story skyscraper in 19 working days in central China.

The Broad Sustainable Building Co. put up the rectangular, glass-and-steel Mini Sky City in the Hunan provincial capital of Changsha using a modular method, assembling three floors per day, company vice president Xiao Changgeng said.

In this March 19, 2015 photo, a puddle reflects the Mini Sky City building in Changsha in central China's Hunan Province. The Broad Sustainable Building Co., a Chinese construction company, is claiming to be the world’s fastest builder after erecting a 57-story skyscraper in 19 working days in central China. The company put up the rectangular, glass-and-steel Mini Sky City using a modular method, assembling three floors per day, company vice president Xiao Changgeng said. (AP Photo/Peng Peng) In this March 19, 2015 photo, a puddle reflects the Mini Sky City building in Changsha in central China’s Hunan Province. The Broad Sustainable Building Co., a Chinese construction company, is claiming to be the world’s fastest builder after erecting a 57-story skyscraper in 19 working days in central China. The company put up the rectangular, glass-and-steel Mini Sky City using a modular method, assembling three floors per day, company vice president Xiao Changgeng said. (AP Photo/Peng Peng)

The company, which has ambitions to assemble the world’s tallest skyscraper at 220 floors in only three months, worked on Mini Sky City in two spurts separated by winter weather. Its time-lapse video of the rapid assembly has become popular on Chinese video-sharing sites since it was first uploaded on YouTube.

“With the traditional method, they have to build a skyscraper brick by brick, but with our method, we just need to assemble the blocks,” company engineer Chen Xiangqian said.

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In this March 20, 2015 photo, a worker welds a building beam at the Broad Sustainable Building Co. in Yueyang in central China's Hunan Province. The Chinese construction company is claiming to be the world’s fastest builder after erecting a 57-story skyscraper in 19 working days in central China. The company put up the rectangular, glass-and-steel Mini Sky City using a modular method, assembling three floors per day, company vice president Xiao Changgeng said. (AP Photo/Peng Peng) In this March 20, 2015 photo, a worker welds a building beam at the Broad Sustainable Building Co. in Yueyang in central China’s Hunan Province. The Chinese construction company is claiming to be the world’s fastest builder after erecting a 57-story skyscraper in 19 working days in central China. The company put up the rectangular, glass-and-steel Mini Sky City using a modular method, assembling three floors per day, company vice president Xiao Changgeng said. (AP Photo/Peng Peng)

Such modular approaches have been used for high-rise apartment blocks elsewhere, including in Britain and the U.S. Some critics say the method could lead to cityscapes with overly uniform architecture.

Liu Peng, associate director of the engineering consulting firm ARUP Beijing, said the method is worth developing because it could become a safe and reliable way to build skyscrapers rapidly.

“But it is not perfect, and it does not meet all kinds of personalized demands,” Liu said. “People nowadays want more personalized architecture.”

In this March 20, 2015 photo, workers walk through the Broad Sustainable Building Co. in Yueyang in central China's Hunan Province. The Chinese construction company is claiming to be the world’s fastest builder after erecting a 57-story skyscraper in 19 working days in central China. The company put up the rectangular, glass-and-steel Mini Sky City using a modular method, assembling three floors per day, company vice president Xiao Changgeng said. (AP Photo/Peng Peng) In this March 20, 2015 photo, workers walk through the Broad Sustainable Building Co. in Yueyang in central China’s Hunan Province. The Chinese construction company is claiming to be the world’s fastest builder after erecting a 57-story skyscraper in 19 working days in central China. The company put up the rectangular, glass-and-steel Mini Sky City using a modular method, assembling three floors per day, company vice president Xiao Changgeng said. (AP Photo/Peng Peng)

Mini Sky City, which has 19 atriums, 800 apartments and office space for 4,000 people, goes on sale in May. The structure is safe and can withstand earthquakes, Xiao said.

The Changsha-based company spent 4½ months fabricating the building’s 2,736 modules before construction began. The first 20 floors were completed last year, and the remaining 37 were built from Jan. 31 to Feb. 17 this year, Xiao said. The company has honed its technology to accelerate its construction speed from two floors to three floors a day, he said.

“This is definitely the fastest speed in our industry,” Xiao said.

The company is awaiting approval for its 220-floor Sky City in Changsha.

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