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RE: Slab dowels - plate v. square v. round

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I prefer the square dowels.  PNA ( sells alignment devices.  They also sell a device that allows one slab to shrink differentially to an adjacent slab placed at a later time (square dowel clip). 
I also like the idea that the flat surface of a square dowel can resist higher loads to avoid differntial movement and degradation of the joint.  And they sell a very effective armored slab edge. 

Harold Sprague

Date: Tue, 29 Apr 2008 08:18:40 -0700
From: wilsonengineers(--nospam--at)
Subject: Slab dowels - plate v. square v. round
To: seaint(--nospam--at)

Is there a big trend towards using plate and/or square dowels in industrial slabs instead of round dowels?
The manufacturer's web sites for plate dowels present good arguments, but do the benefits outway the costs and contractor complaints from the perspective of the specifying engineer?
Jim Wilson

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