Structural question

[sphelps]

You can calculate the maximum allowable load for the room and use that as a guideline. Typically residential floors have a minimum rating of 40 psf which is based on load limit for the entire open area or room (not any given area within a room). So if your living room for example is 20'x10' then it can support at least 8000lbs total. Realistically your tank will weigh around 3000lbs without a sump so you're not really overloading your floor provided the rest of your furniture doesn't weigh too much. In addition the load rating of 40 psf is based on deflection not breaking strength, this is prevent the floor or basement ceiling from cracking from the joints deflecting too much. So realistically you've got lots of room there. The key is to add structural support in the area of the tank to help distribute the load better.