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Mini Sky City, a skyscraper built in 19 days

ArcelorMittal Europe – Long Products supplied 10,345 tonnes of HISTAR® beams for the structure of J57, an high-rise of 57 floors, located in Changsha (China).

The structure of J57 is entirely made of steel and has no concrete core. As it was 90% prefabricated in the factory it was possible to erect 3 floors per day. In total, less than 19 days were necessary to erect the building, hosting 4,000 offices and 800 apartments.

The team of ArcelorMittal Europe – Long Products convinced our client, Broad Sustainable Building, to use rolled sections instead of built-up sections in order to speed up the fabrication and the erection using boleted connections. They had only one night to review the design and convert the box columns into rolled sections.

Produced in Differdange, HISTAR® 460 was the ideal solution as it:

  • Decreases the building’s carbon footprint, leading to weight reduction
  • Increases the net floor area
  • Reduces fabrication works

“Time is money and the modular construction is going to change the way small and tall buildings are constructed all over the world”, said Jacques Braun, a general manager at ArcelorMittal. “The combination of recyclable high-strength steel and rolled sections in HISTAR® is ideal for achieving the fastest, safest and most economical structures”.

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