Midrise floor loading

[tkw]

4-Storey concrete & steel midrise (or low-rise I guess :-) apartment
with two elevators rated for 3500 and 4500 pounds. Can a 2000lb milling
machine with a 3'x3' footprint be safely placed on one of the upper floors?

What if no other object is positioned within 8 feet?
(40psf * 8 * 8 = 2560). Don't know what actual design limits
of structure are or how to find them. Current owner doesn't
know builder. Would the blueprints be on file at city hall?

I guess I'm thinking the answer will be:
A.) No way, don't even try it,
B.) I need to see the blueprints/design specs, or
C.) Based on modern (i.e. 2004) construction techniques, you
should be OK