Concrete Walls

[VictorAK]

Does anyone know how to determine the maximum allowable eccentricity for a uniformaly distributed load on a 10" wide, 8 foot high foundation wall?
The walls were poured 3" off square and the result is a parallelogram shaped foundation wall.

 

[kslee1000]

Please note increase in bearing presuure could result due to the construction imperfection. Check it to see if allowable bearing strength is exceed. Be on the safe side.

 

[hokie66]

kslee,

Why do you have to make everything so complicated? He asked one question, you have asked a lot more, and answered your own questions. Do you want us to comment on your questions and anwswers? If so, start a new post.

 

[kslee1000]

Victor was asking a "known or suggestive allowable maximum eccentricity" to justify the mess, I don't know any, and I don't feel comfortable with/confident on the details (rather small footing base good for mainly concentric load, no upper wall reinforcing, even small bending could cause trouble), so try to encourage him to abide to the conventional way to justify this situation if choosing to. Years down the road he might need to dig out the calculations to justify his decision today. Maybe I am quite conservative on this, but isn't that this forum about - to express one's opinion, concerns through series of discussions/inquires? I really don't understand your complain, if I ask/answer something you don't like, ignore it, dispute it, comment on it, or take it if you like. It's not that complicate.

 

[kslee1000]

VictorAK:

Sorry for the distraction. Please continue the discussion if you feel need for better/more ideas. Good luck.

 

[BAretired]

Why don't you check it under the provisions of "Plain Concrete" in A23.3-94? I don't think it should be much of a problem, but if it is, you might want to specify some vertical steel straps on the inside face of the wall, fastened to the concrete using Hilti fasteners? The cost of doing so is peanuts.



Best regards,

BA

 

[miecz]

VictorAK

Did you intend to use platform framing? The sketch didn't indicate that to me, and I can't find it in your posts.

 

[diarmud]

I think you have more problems. If the contractor can't provide proper shoring and apparently cannot measure accurately, what is the rest of the building going to look like?

How many more problems are you going to have?

Might want to accept a delayed project and insist the contractor redo it. After that, I'm sure he will be paying attention, if you don't insist on him taking it out, the rest of this project may (will) go the same way.

Let us know how it ends up.

Regards.

 

[kslee1000]

After a good night sleep, I would like to tune down my tune a little.

While all my talking above was from a conventional view on a "single wall" that was curving in plane (S-shape), you may want to look the problem globally. I believe the wall forms an enclosure (wall all around) to support the structure above, from this bigger picture, the localized imperfection may not be a big deal, however, attention needs to be put on the local effects. Your decision to do a cal is correct call. The steps and focus points could be tedious, but the cal itsself is rather straight forward. I agree with BAretired' suggestions in case the plain concrete section does not work.