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10" Concrete Col.[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaint(--nospam--at)seaint.org
- Subject: 10" Concrete Col.
- From: Roger Turk <73527.1356(--nospam--at)compuserve.com>
- Date: Fri, 6 Oct 2000 16:33:36 -0400
When I was in school, and the code was ACI 318-56, there were minimum sizes for square and round columns, with a minimum number of bars in each, 4-#5's in square columns, 5-#5's in round columns. IIRC, the minimum size for square columns was 8-inches; and I don't remember the minimum size for round columns. The reason for this was that tests showed that for fewer bars, and/or smaller columns, creep and shrinkage caused the reinforcing to yield, or be close to yield, under no loading. Therefore, the reinforcing in the column could not contribute to the support of superimposed loads. While this limitation is no longer in the code, the reason for it is a good thing to keep in mind. Hope this helps. A. Roger Turk, P.E.(Structural) Tucson, Arizona David Bejan Tehranchi wrote: >>I've noticed in several publications that the smallest listing for round concrete columns is 12" diameter. Is there any particular reason for this? My situation that the Architect has spec'ed out 12" dia. columns which are overkill. Any reason (i.e. code) that 10" diameter wouldn't be allowed?<<
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