Think my floor will collapse?

  • We are currently upgrading MFK. thanks! -neo
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cichniss

Feeder Fish
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Jan 13, 2007
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Red wood city
Hi everyone, i have a question concerning the strength of my floor. I currently have a 120 gallon tank and a 35 gallon tank setup in my room. The room is on the first floor but there is a basement underneath it. I havent had any issues with my current setup but i plan to add a 100 gallon tank in the near future. Supporting the floor are 2x12's. All my tanks run perpendicular to the supports and i plan to do this with the new 100 as well. I am just concerned that all that weight in one room may compromise my floor and cause it to collapse into the basement. Any advice is greatly appreciated! Thanks.
 
Btw the 100 gallon is 6' long so weight will be distributed over a pretty large area if that makes a difference.
 
i wouldnt worry about it
 
If the floor beams are 2x12 (that seems odd to me as I thought most were 2x8) and you are putting the tank perpendicular so it would be supported by several of them, than you should be good, as long as the beams are in good shape. One question I have, how far apart are the beams?
 
How far apart are the joists?

How far do the joists span?
 
It's all good in the hood. We're all here to help.


I am in the process of beefing up the floors in my recently acquired 1936 cottage to hold up my aquariums. They had 2x6 joists on 24" centers, spanning around 14'. I'm sure a 75 would have collapsed through with such an under-supported floor. I have gone back and placed sills to cut the span in half to 7', and doubled up to 12" centers where the aquariums will be sitting..

I also intend to place extra piers directly under the sills that will bear the load from the floor joists.

My stuff is a little different from a basement designed home, but I can still help you design an appropriate support structure if there is a need.

I do have to say this though: I am 1000% confident in my load bearing design knowledge, but I cannot/will not be held liable for any defects in your workmanship causing your floor to fall through.

Pm me and be prepared to take pictures if you are seriously concerned.
 
How old is the house? And are they actually solid beams? Most newer houses have composite beams. Which are cheaper and still strong but not meant to hold more than a few hundred pounds per foot.
 
Many companies use beams made from plywood and small beams. This pic is kind of what I'm talking about. Not exactly though. This pic shows larger beams than what I'm referring to.
Engineered-I-Floor-Joists-by-Carter-Holt-Harvey-223812.jpg


This type of flooring is not meant to hold more than 2-3 hundred pounds of pressure per square foot. So unless your post was a joke then please refrain from posting stupid comments.

Even this is good for most tanks but 3 in one room like that may be cause for concern, if possible you should put in some supports in the basement. Even if it isn't necessary it would nice not to worry about it hey?
 
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