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Re: ACI 318 paragraph 21.2.5

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Aahh Harold, is this akin to leaving the north arrow off the plans to see if
the plan reviewers are asleep or not?

Having a yield strength greater than the tensile strength would truly be a
second problem.....

Humor intended among the unfrozen,

Mark D. Anderson  PE


----- Original Message -----
From: "Sprague, Harold O." <SpragueHO(--nospam--at)bv.com>
To: <seaint(--nospam--at)seaint.org>
Sent: Friday, February 08, 2002 1:27 PM
Subject: RE: ACI 318 paragraph 21.2.5


> Warren,
>
> There were 2 problems with A615 bar that ACI was trying to address.  One
was
> establishing an upper yield strength limit so that inelastic rotation
would
> occur at a predicable level.     The second problem was to have a yield
> strength greater than the tensile strength to get greater inelastic
> rotation.
>
> A706 has established a minimum and a maximum yield strength directly
listed
> in Table 2.  Table 2 also has a footnote that is almost identical to
> 21.2.5(b).
>
> Regards,
> Harold O. Sprague
>
> > -----Original Message-----
> > From: Foy, Warren [SMTP:Warren.Foy(--nospam--at)mhgrp.com]
> > Sent: Friday, February 08, 2002 12:44 PM
> > To: seaint(--nospam--at)seaint.org
> > Subject: ACI 318 paragraph 21.2.5
> >
> > Can anyone explain the intent of this paragraphs' requirement that if
ASTM
> > A615 material is used, "the ratio of the actual ultimate tensile
strength
> > to
> > the actual tensile yield strength is not less than 1.25"?  It seems that
> > the
> > intent is to establish an upper limit on yield strength similar to the
> > requirements of ASTM A706 but I do not see the 1.25 ratio requirements
in
> > ASTM A706.
> >
> > Warren S. Foy
> > Structural Design Manager
> > The Mason & Hanger Group Inc.
> >
> >
> > 300 West Vine Street, Suite 1300
> > Lexington, KY   40507-1814
> > voice: 859.252.9980
> > fax: 859.389.8870
> > web: http://www.mhgrp.com
> >
>
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