Zagz
Aquarium Advice Addict
I am not a construction engineer. But I can't imagine that a 5th floor would be any different than a second or third floor. A lot will depend on the construction of the building. I was out looking at houses today and discovered that newer houses are not constructed with the same heavy wood as slightly older ones. I would see if you could find out how old the condo is and if possible the developer or builder and ask them the question. My honest gut feeling is that it wouldn't be a problem but wouldn't want to guarantee you that. Do you know if they allow waterbeds on the 5th floor? Waterbeds will be heavier than a 55 gal. A 55 gal tank will be around 600+ lbs. Finding out which way the beams run would also be helpful as running the tank across the beams rather than parellel would support more weight.