Does the building have masonry walls?
If it does, it may be possible to mount it directly on the walls. To really isolate from a wood floor system seems a tall order if the motor is big.
The best way is to put a heavy pad of concrete under the machine and then probably also use the rubber isolation devices, I suspect.
If you have masonry walls and if you can put it in the corner, you may be able to add some steel beams and a concrete pad so that it does not bear on the wood floor system.
Tom W
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]
..I also have a 427 Cobra replica with an aluminum chassis.
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