Chinese firm builds world's tallest prefab tower

Broad Sustainable Building claims assembly record of 18 days, but work stopped for a year due to height restrictions

Mini Sky City, Changsha
Mini Sky City, Changsha

Chinese modular building specialist Broad Sustainable Building is claiming a new record for rapid tower assembly.

The company, which had previously claimed that it would build a structure taller than Dubai's Burj Khalifa in just 90 days, is claiming a new record after releasing a timelapse video showing the construction of a 57-storey tower in 19 days.

The firm claimed an ability through the use of modular units to be able to build three storeys a day at the Mini Sky City site in Changsha. Yet the tower, which was originally due to be 97 storeys, had to be cut back to 57 storeys due to concerns about its proximity to nearby flight paths.

Its 19-day claim also sidelines the fact that work stopped at the site for more than a year after it hit 20 floors due to safety concerns.

Mini Sky City still stands as the world's tallest pre-fabricated building, with enough office space for 4,000 staff, 800 apartments and a series of 19, 10m-high atriums.

Broad Sustainable Building had previously planned to build Sky City in Changsha, which would have been 202 storeys high and 10m taller than Dubai's Burj Khalifa.

Broad Sustainable Building had claimed that it would be able to assemble the structure in 30 days and a groundbreaking ceremony took place in mid-2013, but the project never got off the ground.


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