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RE: Alternate Design Method for Concrete

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Yes, I did submit a "public comment" at that time. 

William C. Sherman, PE
(Bill Sherman)
CDM, Denver, CO
Phone: 303-298-1311
Fax: 303-293-8236
email: shermanwc(--nospam--at)cdm.com

-----Original Message-----
From: Scott Maxwell [mailto:smaxwell(--nospam--at)engin.umich.edu] 
Sent: Wednesday, June 22, 2005 6:03 PM
To: seaint(--nospam--at)seaint.org
Subject: RE: IBC Question

Did you submit a comment to ACI 318-02 when the ADM was proposed to be
removed?  For some reason, I seem to recall your name from somewhere
when I was working for ACI.  Of course, I am getting old and senile,
so...

Scott
Adrian, MI


On Wed, 22 Jun 2005, Sherman, William wrote:

> You do make a good point that the commentary is not part of the legal 
> document, although I do think that the Commentary could be sited as a 
> clear indication of the code committee's "intent".  I was strongly 
> opposed to removal of the Alternate Design Method from ACI 318, and in

> my opinion, all material codes should maintain some basic ASD 
> provisions, even if relatively conservative.  We should maintain the 
> ability to analyze service load stresses and to have a feel for the 
> acceptability of the calculated stresses.
>
> As an ACI 350 committee member, I am also a strong proponent of 
> keeping the Alternate Design Method in that code, which is still part 
> of the next proposed version (due to be published for public comments
soon).
>
> William C. Sherman, PE
> (Bill Sherman)
> CDM, Denver, CO
> Phone: 303-298-1311
> Fax: 303-293-8236
> email: shermanwc(--nospam--at)cdm.com
>
>
> > -----Original Message-----
> > From: Scott Maxwell [mailto:smaxwell(--nospam--at)engin.umich.edu]
> > Sent: Wednesday, June 22, 2005 8:17 AM
> > To: seaint(--nospam--at)seaint.org
> > Subject: RE: IBC Question
> >
> > Ah, but from a technical point of view, section R1.1 is _NOT_ part 
> > of ACI
> > 318 (i.e. the "code").  The commentary is NOT a "legal"
> > document...in otherwords, it is not a mandatory language document 
> > and has no standing from the point of view of being "code 
> > enforceable".  Now, it could be construed as a "standard of care" 
> > document.
> >
> > The point is that from a purely code/"legal" point of view that bit 
> > in the commentary means nothing.
> >
> > Now, if you have a local juridiction that has adopted ACI
> > 350-01 as a referenced code for environmental structures (i.e. 
> > tanks, etc), then I believe WSD would still be permitted "per code" 
> > as I believe ACI 350 still has WSD (aka the "Alternate Desgin 
> > Method").  It is also possible that some of the ACI nuclear oriented

> > codes might still have WSD in them.
> >
> > Thus, that is the reason why I stated "technically, WSD no longer 
> > exists for concrete".  You forgot my little qualifier (i.e. the 
> > "technically").
> > You are correct, however, that the commentary does imply that WSD 
> > "may"
> > be used, but as I am not a lawyer (though I have stayed in Holiday 
> > Inn Express hotels in the past) I cannot say how much legal validity

> > such a commentary statement has.
> >
> > Regards,
> >
> > Scott
> > Adrian, MI
> >
> > On Wed, 22 Jun 2005, Sherman, William wrote:
> >
> > > It is not completely accurate to say that "WSD no longer exists 
> > > for concrete" or that a 1/3 increase no longer applies to
concrete.
> > > Although the Alternate Design Method is no longer published
> > in the ACI
> > > 318 Appendices, Section R1.1 of ACI 318-05 includes the
> > statement "The
> > > Alternate Design Method of the 1999 code may be used in place of 
> > > applicable sections of this code."  And section A.2.2 of the 1999 
> > > Appendix A for the Alternate Design Method permits a 0.75 
> > > reduction factor when considering wind or earthquake forces. Thus,

> > > WSD with a
> > > 1/3 allowable stress increase is still permitted - it is
> > just hidden well.
> > >
> > >
> > > William C. Sherman, PE
> > > (Bill Sherman)
> > > CDM, Denver, CO
> > > Phone: 303-298-1311
> > > Fax: 303-293-8236
> > > email: shermanwc(--nospam--at)cdm.com

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