Broad Sustainable Building completes world's tallest prefab, 57 stories — treehugger.com

This TreeHugger is a huge fan of Broad Sustainable Building's prefab building technology, and I have been impressed by the passion of its chairman Zhang Yue, who is trying to build the world's tallest building, Sky City. He now has built a big slice of it next to his factory in Changsha, as offices and housing for families of employees at Broad. This building, which rose at the rate of three floors per day, has 57 floors and 800 apartments.

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