Hi budruiz, there isn’t any specific dimension provided for the foundation itself. There are just too many variables from installation to installation to have a one size fits all floor plan. This is why an experienced mechanic and concrete company would be helpful to you.
Here is the minimum I would recommend for a press like yours…
A length that allows the feeder side frames, all the printing units and delivery side frames be on the foundation. Width should be slightly wider than the oil pans. I recommend an out rigging for the main motor to be on the same foundation as the press. Thickness should be left to a qualified concrete/flooring engineer who will base his recommendation on length, width and weight of the machine and underlying soil conditions.
Do you plan on having the main electrical feed, wiring to the console and exhaust venting underground or overhead? Going underground will alter what I suggested above. See! Variables.
Hope this helps