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RE: Slab buckling

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I investigated this issue a number of years ago.  You are correct in that
the weight of the slab helps to resist the tendency to buckel.  I performed
a crude buckling analysis and came to the conclusion that there was no
problem.  The wall was over 20 feet high proped at the top.  The slab was 5
inches thick with #5@ 12 inches oc ew. The basement was long so the
perpendicular walls were not an issue.   It has been about 9 years and I
haven't heard of any problems.

If you will send me a fax number I will send you an outline of the
analyitical aproach that I adopted.

Mark Gilligan 

From: Mark Pemberton <markpemberton(--nospam--at)>
Reply-To: <seaint(--nospam--at)>
To: seaint(--nospam--at)
Subject: Slab buckling
Date: Tue, 18 Jan 2005 15:04:06 -0800 (PST)

Does anyone know of research on or formulas for checking a slab for
buckling when laterally restraining a retaining wall. It would seem that
gravity would be resisting this buckling action, but I do not know how to
take this into account. I know there are thousands of homes here in
California where the basement retaining walls are being restrained by slabs
instead of shear keys, and I've not heard anything about buckling slabs.
Any comments. (I have already read the previous threads on this, but found
no real help) Thanks in advance.

Mark Pemberton, S.E.
Pemberton Engineering

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