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RE: Knock-out Panel

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Jordan,

 

Thanks for the response.  Well, I can’t quite picture this.  I’m having a tough time picturing what you mean by “step.  Can you email me a sketch?

 

Thanks.

 

 

Rich

 

 

-----Original Message-----
From: Jordan Truesdell, PE [mailto:seaint1(--nospam--at)truesdellengineering.com]
Sent: Monday, May 23, 2005 10:50 AM
To: seaint(--nospam--at)seaint.org
Subject: Re: Knock-out Panel

 

Rich Lewis wrote:

I don’t think precast panels would be practical.  This is a below grade foundation wall that needs a future opening into the basement area.  The remaining structure is all cast in place.

.

Place the concrete with the opening boxed out. Make the fill side opening 4" larger than the basement side, with a "step" about half way in.  Make a second placement for the knockout, placing a bentonite water stop around the perimeter of the opening.  If the opening is large enough, you may need to reinforce the knockout and/or thicken the wall around the knockout area in order to get the shear resistance at the "step" in the wall, where the effective wall thickness is only 1/2).

(Did that make sense?)

Jordan

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