Confirm or Correct my Floor Support Fears

  • We are currently upgrading MFK. thanks! -neo

Cry Havoc

Jack Dempsey
MFK Member
Oct 11, 2009
23
0
31
Utah
Warning: Long post. Thank you in advance for reading. Even if you can't help with the floor, I'm open to hearing suggestions about what to do with the tank.

125 Gallon Tank
72"x18" footprint
Diagram of living room below

I've been reading and reading about a floor's ability to support the weight of a large fishtank. I understand every floor is different, and every thread I've read suggests getting an engineer to inspect the floor if I want to be positive. I'm no engineer, and I don't know any, and I don't think I would want to pay for one to come out just for my fishtank. I actually think I've made a decision, but I want to hopefully talk this through before I make any rash decisions. There's a lot of knowledgeable people on this site, and I'm hoping with enough details someone might be able to provide an expert opinion.

I moved into my first house a few months ago (hooray!) and I'm finally able to think about where to set up my tank. I've never set it up before, and before I start building a stand for it I want to make sure I know where it's going.

I want the tank to be in the upstairs living room. Downstairs has plenty of room, but no access to a faucet to use my python water changer, and there's no way I'm going to do water changes using a bucket with this size tank. I understand that placing the tank so it crosses as many floor joists as possible is ideal, but I'm not sure it's possible for me. I've put a diagram below of the living room. It's not to scale, but hopefully you get the idea. I can either put the tank on the left wall, which is not ideal for floor support, or I could put it in front of one of the windows. I'd like to avoid that if possible, but I suppose it is an option. Floor joists are visible in the laundry room downstairs, so I can confirm they are 7"x1.5" with 16" spacing between them. The left wall is an exterior wall. There is a load bearing beam supporting a span under the floor between the living room and kitchen (as you travel down the hall in the basement, the beam becomes a load bearing wall. The beam is there so the family room downstairs is larger and supports the ceiling above/floor of upstairs. Hopefully that makes sense.) I can't be sure of the actual dimensions of the beam since it has drywall/paint over it, but it appears the beam measures approximately 11"x4.5".

I think if it were only these factors, I would still be okay putting the tank on the left wall. But here's the kicker: I live close to a railroad track. This means whenever a freight train goes by, which is several times a day, my house shakes slightly. It's not like Mary Poppins where they hold everything in the house together when the neighbor's cannon goes off, but you can most definitely feel the floor trembling throughout the house. Basically this worries me that even if the current support is enough, this slight shaking over time will be bouncing my tank, adding even more force to the floor, and will be too much and will cause eventual failure.

I've stressed over this enough, and I just want to make a decision. My thought is that it's too much and not safe, but I was hoping a kind soul with some kind of experience could chime in and either confirm what I'm thinking or correct me and offer some encouragement that it might be fine. If you don't have that experience, feel free to give suggestions as to how I could still take advantage of this tank I've been so excited about. I've been brainstorming my options, and I've come up with:

-Put the tank on the left wall and cross my fingers
-Put the tank in front of a window. It would also cover a vent, but there is another one there. Tank back will be blacked out, so I don't think algae blooms would be a problem.
-Still use the tank on left wall, but with a setup that only uses about half the water level. Turtles with basking area? Paludarium?
-Put the tank downstairs, bite the bullet and do bucket water changes
-Downsize to a 55 gallon tank. This would suck since I've never had this tank in operation, but I'd rather do that than ruin my house.

Any questions, input, or suggestions?



Living Room.png

Living Room.png
 
I see a lot of options that will hopefully help you. 1st, I would NOT put the tank along that external wall. You will be asking a lot for 1 floor joist to supports 1400 pounds. The floor will no doubt sag over time, if not right away. Your best option for placing the tank is on the window wall. If you build your stand, build it to 7' long to disperse the weight. So you will have a 72" tank sitting on an 84" stand, thus allowing you to potentially have the tank across 5 floor beams instead of just 4. That being said, if you have a door way to outside in the downstairs area, this would be your best bet. You can always buy a length of hose for your python water changer, long enough to reach from an upstairs faucet, down to the downstairs tank. As far as draining the water, you can just run a garden hose from the tank outside the door and either manually siphon it, or use a power head to pump the water out.
 
if I were you I'd contact a local structural engineer and have them look over your situation. they'd be able to show you the needed support.
I actually called construction companies until I found one that had one in it's employ, since I wasn't able to do the work myself.
 
I see a lot of options that will hopefully help you. 1st, I would NOT put the tank along that external wall. You will be asking a lot for 1 floor joist to supports 1400 pounds. The floor will no doubt sag over time, if not right away. Your best option for placing the tank is on the window wall. If you build your stand, build it to 7' long to disperse the weight. So you will have a 72" tank sitting on an 84" stand, thus allowing you to potentially have the tank across 5 floor beams instead of just 4. That being said, if you have a door way to outside in the downstairs area, this would be your best bet. You can always buy a length of hose for your python water changer, long enough to reach from an upstairs faucet, down to the downstairs tank. As far as draining the water, you can just run a garden hose from the tank outside the door and either manually siphon it, or use a power head to pump the water out.

Thank you. I was thinking it might be suicide to put it on that wall, glad to have someone confirm that. I'll have to consider the other options. Thanks for responding.
 
if I were you I'd contact a local structural engineer and have them look over your situation. they'd be able to show you the needed support.
I actually called construction companies until I found one that had one in it's employ, since I wasn't able to do the work myself.

I mentioned I would prefer not to pay for an engineer. I'd rather just go another route with my tank. Since you brought it up, may I ask how much they charged you for a consultation?
 
I'm real bad at this kind of thing, mostly because I've been lucky enough to have solid concrete floors beneath my tank. Only thing I would say is with the train going by and the floor shaking I think it would be a disaster waiting to happen. The shaking would not only put strain on the floors but the tank as well and I've seen a lot of people on here have tanks crack because of extra stress on the tank. If the tank did give think about the massive amount of damage it would do to your living room or the floors. You can easily buy tubing from Homedepot or any other store of the like to get it to reach the tank for water changes if you did place it downstairs. Hell turn the downstairs into a man cave with the tank as the focal point and get yourself something smaller for the upstairs if you really want something upstairs. As you said a turtle tank could look wicked if you put your time into planning it or even a poison arrow dart frog tank. Just my opinion and no matter what you choose man, I wish you good luck.
 
Hello; A tank in front of the window will likely get quite warm from the sun even if shaded to prevent algae.
Also covering a vent could be more of an issue than you anticipate now.
The only way I can picture resting on one floor joist i to be able to reinforce from below.

Even across multiple joists there couldbe issues if the structure is not sound. While a structural engineer may be the best, an experienced contractor may have the needed knowledge and experience while also being not so expensive to hire.

Do you have a drain in the lower part of the house? If so, draining the old water should be easy. It may be possible to plumb a faucet on an existing water line down there and have access to water from it.

In case you missed this thread a while back here is a link to it. A look at the pictures should give pause, they did for me.

http://www.monsterfishkeepers.com/f...-out-there-Question-about-reinforcing-a-floor

Good luck
 
The tank must run across the joist. So you should have 2 or more supporting the tank. Its the only real way to do it unless the walls are all concrete, which I doubt they are.
You could also put some more support joist under the floor if you know how. Or you can put small joist in between the wall joist and the first joist that is 16" or 24" OC depending on how its framed. Union Carpenter Since 1999 NYC local 157.
 
MonsterFishKeepers.com