Can this be right?

Is a F.A.R. of almost 1,200 too much? Is a 17,000ft (3.2 mile) building too tall? Is 2.1 million square feet too big of a footprint for a single building? So far our zoning rules do not seem to preclude these outcomes:

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(click here for the PDF version)

There are clearly some issues with this proposal:

1) 85% efficiency of occupiable area versus built area might be overly optimistic in a structure over 3 miles tall.

2) Reserving a half-dozen floors, each with 10' ceilings, for open-air greenspace probably won't work, considering the fact that natural daylight will only reach about 5% of the area.

3) Open greenspace on the roof? At over 3 miles high? Only if supplmental oxygen systems are available. Some more info on altitude vs. oxygen. Then there's the issue of being above the clouds, though that would only help with allowing more sunlight :)

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4) Proximity to airport could be an issue. I still haven't found airspace maps for aiports yet, but I know they exist. Perhaps they just aren't published online, or for free...

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As for the structural integrity of such a tall, tall thing, I am not convinced. I wonder what PvB would say about it...