Thursday, November 19, 2009

RE: ACI Grade Beam Construction Joint

Rand,
Just extend the rebar beyond the joint and provide a class B lap unless the bar is too big, then use a mechanical splice.  On the vertical face, I have seen keys, roughened surface to 1/4" amplitude, or Stay-Form to provide a roughened surface with no prep to provide a shear interlock.  Some engineers like to provide Z shear bars across the interface to assure a mechanical connection across the interface.  But that is more holes in the forms.
 
Stay-Form makes the contractors happy, provides a roughened surface, and makes me happy.  They have some very good details. 
http://amico-stayform.com/pdf/Stay-Form%20Details%20b&w.pdf
 
Regards, Harold Sprague


 

From: spraguehope@hotmail.com
To: seaint@seaint.org
Subject: RE: ACI Grade Beam Construction Joint
Date: Thu, 19 Nov 2009 15:49:33 +0000

I don't think that you will find any "ACI accepted" grade beam construction joint details.  But this is a resource to a lot of details assembled by various Govt. agencies including the US Army Corps of Engineers and NAVFAC. 
http://www.wbdg.org/ccb/browse_lib.php?l=07

Regards, Harold Sprague


 
> Subject: Fw: ACI Grade Beam Construction Joint
> To: seaint@seaint.org
> From: RHoltham@CBI.com
> Date: Mon, 16 Nov 2009 12:09:10 -0600
>
>
> Listers
>
>
> Where can I find an (ACI accepted?) grade beam construction joint detail?
>
>
> TIA,
>
> Rand
>
>
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