I saw a DIY show on fixing up an old house and they were bringing in a 700 pound kitchen island countertop. I wondered about sitting a fat family of six or eight around there chowing down ... How much can you ask of a poor floor?
>>700 pound kitchen island countertop. <<
most residential floors are 40 pound live load, so that needs a minimum of 17.5 square feet of floor to support it at max load.
Hope they shored up by upgrading the joisting, and/or shortening spans.