[UpwithOlives]

"The residential and hotel tower floor-plates essentially hang above the double height retail space from the mega-columns and the angled hangers (exoskeleton) support multiple corners of the floor-plates which cannot be poured until each set of hangers is installed. Thus the lag between pouring the main floorplate (sans corners) followed by hanger installation, followed by corners poured.

All this so a super-tall can float above that retail $pace (with out the help of a traditional elevator core)."


I don't believe the floors (other than the corners) hang from the mega-columns, although they carry much of the load. There is a very large steel structure with diagonal columns in the ground level space and up through 5 that carry the center load. Transfer slab on 5 is where the elevator pits for the hotel and residences are located. There is very much a core from this level up.