Can I put a 120 gallon upstairs without worrying?

[lastlight]

Not a warning per se just my current story. I only have about 35 gallons on my floor. It's an older townhouse with 2x8 floor joists not the engineered ones. I could see the deflection downstairs! Tank bounced very badly too and over time I'm sure it would have gotten worse. I added a jackpost underneth and it has helped. I know I wouldn't place a 120 on my floor but generally I think you're ok (maybe bouncing as you walk by).

[reefwars]

out of curiosity is there any certain way to figure out how much weight load your joists can carry their must be a formula to figure out how much your floor can hold?? anyone know?? always have been curious

[moppy]

It will be sitting on Hardwood flooring and will be against 1 wall (middle of the room). It is a bearing wall but the bottom floor is finished and I can't see the joists. Anyway to know where they are?

House is only 10 years old.

[kien]

Originally Posted by moppy

It will be sitting on Hardwood flooring

Is the hardwood already installed? If so, I thought that hardwood floors had to be installed perpendicular to the floor joists, no?

[Delphinus]

FWIW, they're installed parallel in my house..

[Coleus]

well FYI globaldesign has his 250 gallon on his upper floor plus the sum :-)

[ILIKECOUGARS]

Originally Posted by Delphinus

FWIW, they're installed parallel in my house..

Hardwood flooring should alway be installed perpendicular or diagonal to the floor joists. This is what I was told by a saleperson that sells hardwood flooring

[Delphinus]

Not necessarily. I think it's just "better" to install perpendicular but not "necessary". Or maybe depending on age of house or subfloor material it might become necessary.

http://ca.answers.yahoo.com/question...2080410AAR7alg

The only point I really wanted to make is that it's better to check/confirm before acting on assumptions, particularly when it's easy enough to get a definitive idea where the joists run.