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Re: Penetrations in Grade Beams

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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 loading.


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

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