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Re: ACI crack control

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William,
Thanks a lot for your attention.
RL
----- Original Message -----
From: "Sherman, William" <ShermanWC(--nospam--at)cdm.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Wednesday, October 06, 2004 11:13 AM
Subject: RE: ACI crack control


> Yes, new crack formulas will be shown in the next issue of ACI 350 - but
> they will not be the same as the formulas in ACI 318. The z-factor was
> retained in the 350 code, since the 318 formula permitted much wider
cracks
> and wider bar spacings.
>
> The draft 350 code will likely be published on the ACI website for public
> comments near the end of this year, for issue in 2005.
>
> 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: Rlabbe [mailto:rlabbe(--nospam--at)cadeidepe.cl]
> > Sent: Wednesday, October 06, 2004 8:36 AM
> > To: seaint(--nospam--at)seaint.org
> > Subject: Re: ACI crack control
> >
> > William,
> >
> > Thanks for your reply. In fact I was looking for control of
> > flexural cracking.
> > I see that ACI 350 is still using the old z factor, and the
> > new ACI 318-02 has a different approach, but not covering
> > structures subjected to special enironmental conditions.
> > Will ACI 350 be refreshed, in the light of ACI 318-02 or something ?
> > Best Regards,
> >
> > Raul Labbé  S.E.
> > M. ASCE
> >
> >
> > ----- Original Message -----
> > From: "Sherman, William" <ShermanWC(--nospam--at)cdm.com>
> > To: <seaint(--nospam--at)seaint.org>
> > Sent: Wednesday, October 06, 2004 9:59 AM
> > Subject: RE: ACI crack control
> >
> >
> > > I'm not sure what you mean "states the cracking control", but in ACI
> > 350-01:
> > >
> > > Section 7.12.2.1 includes provisions for control of cracking due to
> > > shrinkage and temperature for liquid-tight structures; and
> > >
> > > Section 10.6.4 includes provisions for flexural crack control in
> > > liquid-tight structures.
> > >
> > > Also, R10.6.4 refers to crack widths that were used to derive the
> > > required "Z-values" - but these should not be taken as exact values
> > > for actual
> > crack
> > > widths in the field.
> > >
> > >
> > > William C. Sherman, PE
> > > (Bill Sherman)
> > > CDM, Denver, CO
> > > Phone: 303-298-1311
> > > Fax: 303-293-8236
> > > email: shermanwc(--nospam--at)cdm.com
> > >
> > > ________________________________
> > >
> > > From: Rlabbe [mailto:rlabbe(--nospam--at)cadeidepe.cl]
> > > Sent: Wednesday, October 06, 2004 5:56 AM
> > > To: seaint(--nospam--at)seaint.org
> > > Subject: ACI crack control
> > >
> > > List,
> > >
> > > Can anybody advise on the precise ACI code that specifically states
> > > the cracking control, besides the usual conditions as shown in ACI
> > > 318-02. e.g. for liquid-containing concrete structures, nothing is
> > > said in ACI 350.3 nor ACI 350.01.
> > >
> > > Many thanks in advance.
> > >
> > > Raul Labbé  S.E.
> > > M. ASCE
> > >
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