Will floor support tank?

[Spyd]

As long as you span multiple joists you will be fine. Just dont put it against a wall where the length of the tank is running with the length of the joists

[ongquang21]

Your tank is 90g cube that means 28"x28x28. The joists are usually 12" away from each other. For a better support, you have to know where the joists exactly are so you could put your tank on three joists. Otherwise it will be on only two, that's not good at all. "you have to" because your tank is "heavier " for each joist than the 240g 96"x24x24.

[Slyguy00]

I have my 75 gallon and 15 gallon sump in my condo on the second floor. Haven't seemed to have any problems. My building is about 3 years old as well.

[WarDog]

My company has done hundreds of townhomes in Langley in the last 10 years. They all have pretty much the same design. I'm guessing there is a single garage, entry, mechanical room/closet and maybe a bonus room on the ground. Second floor has kitchen, dining, family room and a w/c. If this is the case then your floor joists run perpendicular to your partition (party) wall. Joists will be 12" apart for sure. There will also be several engineered beams as well. This design will hold the weight no problem, but depending on how close you can get to a engineered beam, the tank my wiggle a bit when you walk past. If you have a stainless natural gas BBQ box then we did the complex for sure. Hope this helps.