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RE: Penetrations in Grade Beams

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The PCA publication "Notes on ACI 318-02 Building Code Requirements for 
Structural Concrete" has an example problem showing how to deal with the 
special shear problems around a hole in a concrete beam.

Roger C. Davis
SDS Architects, Inc.

-----Original Message-----
From:	Daryl Richardson [SMTP:h.d.richardson(--nospam--at)]
Sent:	Sunday, November 24, 2002 12:16 PM
To:	seaint(--nospam--at)
Subject:	Re: Penetrations in Grade Beams

 << File: ATT00021.htm >> Brian, John,

        Usually you don't have the luxury of being able to relocate a
grade beam penetration to suit our own convenience.  On the other hand,
you usually do have unrestricted choice of using what ever width and/or
depth of grade beam your little heart desires.  This should allow you to
accommodate any grade beam penetration in much the same way you would
accommodate a penetration in a shear wall; just design whatever remains
of the grade beam above and below the penetration to carry the required


H. Daryl Richardson

John Nader wrote:

> I have never seen any books on this subject.  Penetrating thru a grade
> beam is the same as penetrating thru an elevated beam.  The ACI-318 ,
> I think the first chapter gives the sizes and rules.  (If you can't
> find let me know).  Stay away from the end of the beam where the shear
> is high. John
>      ----- Original Message -----
>      From: Brian Spencer
>      Sent: Friday, November 22, 2002 11:25 AM
>      To: seaint(--nospam--at)
>      Subject: Penetrations in Grade Beams
>       Does anyone have any good resources for penetrations in
>      reinforced concrete grade beams?
>      Thanks in advance
>      Brian Spencer
>      Tylk Gustafson Reckers Wilson Andrews, LLC
>      407 South Dearborn, Suite 900
>      Chicago, IL 60605
>      bspencer(--nospam--at)

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