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RE: Minimum Slab on Grade Steel

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I don't believe that there is an accepted minimum reinforcing ratio for slabs on grade.  I have occasionally designed industrial slabs with no (zero, nil, nada) reinforcement and had good success.  Of course, this requires frequent jointing and excellent curing.  
Stan R. Caldwell, P.E.
Dallas, Texas
-----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.