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Re: ACI 117

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The basic problem is that many engineers do not know about ACI 117.  How
many engineers on this list server have read all of the documents
referenced in their project specifications?   This is compounded by the
fact that many engineers have never had a class on writing project
specifications.  

Since the tolerances listed in ACI 117 are not essential to insure life
safety they are appropriately not listed in ACI 318.  This standard should
be referenced in the technical specifications along with any project
specific tolerances.   If you have invoked ACI 301 then you have already
addressed this issue.  If you have not directly or indirectly referenced
ACI 117 then it becomes diffifult to make the contractor correct it if he
doesn't want to.

I would suggest that many engineers who have referenced ACI 301 have not
read it and may not even have a copy.  I have seen many situations where
ACI 301 has been referenced in the specifications while many of the same
issues have also been addressed in the project specifications.  The problem
is that nobody has told the contractor how to reconcile the provisions in
ACI 301 with the different provisions in the project specification.

One area of concern is that the tolerances in ACI 117 may not be compatible
with some architectural products such as windows and doors.

Mark Gilligan

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