I have no problems with isolation from footfall with my set up. I have a 5 foot tall Zoethecus rack sitting on a suspended wood floor. But, the rack is actually fixed to a nearby wall using angle brackets attached to a cleat that is, in turn attached to the wall. My table is a Basis Debut.
I generally find that lighter tables with spring suspensions to be the most susceptible to problems with footfall. Big heavy tables that have damped spring suspensions work the best. It is analogous to big heavy cars riding over bumps in the road.
For your temporary set up, I would think that the easiest, and cheapest experiment at isolation would be sorbothane pucks. They do a very good job of dissipating the energy from the movement of the floor without itself oscillating.
I generally find that lighter tables with spring suspensions to be the most susceptible to problems with footfall. Big heavy tables that have damped spring suspensions work the best. It is analogous to big heavy cars riding over bumps in the road.
For your temporary set up, I would think that the easiest, and cheapest experiment at isolation would be sorbothane pucks. They do a very good job of dissipating the energy from the movement of the floor without itself oscillating.