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It's not just the ability of the floor to hold the weight (my rough calcs could put dead weight at maybe 20psf) but the flex of the floor based upon span and terrazzo's lack of flex other than at control joints. Malls many times have metal flex points at 3'6" ish apart.
I'd get with an engineer on it to save possible headaches later. Although the current residential code does cover flooring spans with a 20lb dead load check at least with the manf of the material regarding flex
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