Skyscraper construction is actually quite fast, even if you don't do it modularly. A floor should only take a day or two for initial construction, with other tr

Skyscraper construction is actually quite fast, even if you don't do it modularly. A floor should only take a day or two for initial construction, with other trades following behind and adding cladding, electrical, etc. Steel beams are modular, after all. The slow parts are preparing the foundation, which seems to be skipped over here in the timeline, and pouring and drying concrete bits, which this building doesn't have.