Quote:
Originally Posted by BVictor1
Why the top...?
Maybe that's where the sway was the worst?
Those floor plates are smaller, so you're losing less sellable square footage?
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Well by this logic the blow-through would be on the 97th floor, but then you'd just have all the sway of a 96-story building. So you have to push the blow-through lower down to some point that maximizes the lessening of sway. In other words it doesn't go where sway is greatest; it should theoretically go where eliminating a wind load will reduce sway the most. Where that happy medium is I certainly don't know, but on the 83rd floor the blow-through is about 80% up the building, which at least seems a little high. On 432 Park, they are nicely dispersed at 22%, 37%, 53%, 69%, and 84% (going off of its Emporis page). Intuitively makes much more sense, though of course the buildings are different in their massings and in other ways.
What I'm really wondering is whether it would have been much more effective a bit lower, at the final setback -- but got pushed upwards for aesthetic reasons.