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RE: Knock-out Panel

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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.


Rich Lewis

Lewis Engineering



-----Original Message-----
From: Kestner, James W. [mailto:jkestner(--nospam--at)]
Sent: Monday, May 23, 2005 9:57 AM
To: seaint(--nospam--at)
Subject: RE: Knock-out Panel


How about using precast panels with rubber membrane membrane waterproofing?


Jim K.

-----Original Message-----
From: Rich Lewis [mailto:seaint02(--nospam--at)]
Sent: Monday, May 23, 2005 8:22 AM
To: seaint(--nospam--at)
Subject: Knock-out Panel

I am designing a concrete basement wall that is to have a knock-out panel for a future opening.  I would appreciate any suggestion on the best way to detail this to ensure waterproofing and ease of demolition in the future.