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RE: Minimum Slab on Grade Steel

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PCA has a publication for down load on their site. "Slab Thickness Design for Industrial Concrete Floors on Grade" by Robert Packard.

Ronald A. Hill, P.E.
HILL Consulting Engineering
PO BOX 26525
Birmingham, Alabama 35260 USA
Phone: 205-823-4784
FAX: 205-823-4145
email: ronhill(--nospam--at)
Messenger: ronhill(--nospam--at)

-----Original Message-----
From: Keith De Lapp [mailto:keith(--nospam--at)]
Sent: Thursday, May 20, 2004 4:33 PM
To: seaint(--nospam--at)
Subject: Minimum Slab on Grade Steel

It has always been my opinion that ACI (0.0018 minimum temperature and shrinkage reinforcing) applies to elevated slabs and not slabs on grade.  I have always designed my sog reinforcing to ACI
Is there a code or industry recommendation for sog minimum steel?  I find myself in a situation where a contractor has made an error and I am trying to substantiate my design/specification with code/industry reference while the contractor tries to politely challenge me.
Thanks in advance for your prompt response.
Keith De Lapp, P.E.