just 1 more tank ok honey

[slakker]

180G, 1800 lbs plus sump, rock, stand, sand... you're well over 2000 lbs. spanning over 5 joists you're at 400 lbs per joist. You may be spreading the weight over more joists via the sub floor. So that should hold (I'm not a structural engineer mind you), but if you have access to the floor, it wouldn't hurt to reinforce the joists.

[marie]

Originally Posted by slakker

180G, 1800 lbs plus sump, rock, stand, sand... you're well over 2000 lbs. spanning over 5 joists you're at 400 lbs per joist. You may be spreading the weight over more joists via the sub floor. So that should hold (I'm not a structural engineer mind you), but if you have access to the floor, it wouldn't hurt to reinforce the joists.

But then you could look at it a different way 2000lbs, thats the same as 10 200lb guys having a group hug

I have my 175g bowfront spanning 5 10" joists on the second floor. It is against a load bearing wall though

[SeanPrest]

Ive got a 180 with a 40 gallon sump on my floor. as long as you are spanning the joists and on a load bering wall you should be fine. i wouldnt put it in the middle of a room though.

[PoonTang]

I have a 90 with a 30 gal sump and am not spanning any joists at all. Running parallel and not over a loadbearing wall either. Been like that for 2 years now with no problems.

[heyfredyourhat]

i have 160 total over 4.5' and i am hitting about 4 joists (one is doubled) on a load bearing wall. BUT there was a jack in the basement about halfway in from the wall(where teh tank sits) that helps out and is underneath the double joist...if that made any sense at all!