Uneven Floor


I live in Chicago and have an uneven floor and do not know what to do. It seems like it's really only one area, right in the middle of the house. Underneath the floor is where the main house I beam is located. If you follow the beam, the floor is fine where the beam starts and ends. But it's only in the middle of the house where the floor is uneven.
I was wondering, is this a problem? In order to get this fixed, would the house need to be jacked up? If so, approximately how much would I be looking at in getting this fixed?
Thank you in advance for any help!
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You can have it jacked up, but you will most likely have to fix allot of cracked broken drywall or plaster.

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Cliff Hartle wrote:

Impossible to diagnose without seeing it. It could be that the house has settled for some reason, but is now stable and not going to get any worse. Or it could be that there is no proper support for the beam, the beam is too small, etc. You say the beam is fine at both ends. What's supporting the rest of the span? Is the beam sagging and by how much? You say it's an I beam? Steel?
Best approach is probably to get a good home inspector in to go over the whole house and give you some advice. Then, if necessary, a structural engineer.
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snipped-for-privacy@gmail.com wrote:
...

Well, if the beam has deflected sufficiently that the floor sag is noticeable, I'd say that's "a problem". How big depends on how much and, to a lesser degree perhaps, how long it took.
Probably the best approach would be to get an engineering evaluation/report if the house is older. If it is a newer house, you might have some reason to go back to the builder, but I'm guessing that isn't the case.
What one can do for recourse is dependent on many things including whether there is a basement or only a crawl space, if the basement is finished or not if there is one, etc., etc.
It sounds as though the original beam was undersized for the span (or a larger point load was added after the design like placing a huge commercial double-wide refrigerator there in a kitchen remodel). The cheapest route probably would be to add a support post in the middle under the beam, but even that requires there be sufficient bearing surface under it to take the load (which wouldn't be just a poured basement floor, for example).
With a properly sized pier added, it's possible that over a period of time the beam could then be raised back to its proper position. Raising it a fraction of an inch at a time and letting the structure relax to the new position over a period of months could well prevent major upheavel in other areas that would probably occur if the whole thing were raised at one time.
HTH, but I think you need an expert to evaluate the situation...
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wrote:

If you are trying to play marbles, yes.
If not, keep your eye on it to see if gets worse.
IIUC, it's not sagging where the beam is, only elsewhere, right.

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Thank you for all the responses. It sounds to me as if it gets worse or if it is really a problem, call somebody in to take a look at it.
I'm pretty sure that the previous owners had a waterbed on the side of the house that is un-even, so that might be what happened. But, it is an older house (about 65 years old), and I know that these things happen. But as for the i-beam, yes, it is a steel one that runs the length of the house and has two steel columns/poles to support it in the middle.
Thank you again for all the responses!
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snipped-for-privacy@gmail.com wrote:

So, have you determined that the steel I-Beam is in fact sagging and by how much?
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On 26 Nov 2006 06:51:41 -0800, snipped-for-privacy@optonline.net wrote:

wOW. I didn't know they used steel beams in single family homes by 1940. Actually, I ddin't think they did. Did they?

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