#skyscraper construction

Construction workers sitting on a hoisting ball above the city skyline, ca. 1925. The Singer Building is in the background.

Jo Cain (Joseph Lambert Cain), Steel Worker Above the City, 1930s. Gouache on paper.

By Peng Peng And Didi Tang, AP, Apr 30, 2015

CHANGSHA, China (AP)--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.

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.

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.”

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.