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RE: NEW ACI 355.2- BIG CHANGES LIKELY FOR POST INSTALLED ANCHORS

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Howard

It was reported by ACI that a manufacturer of anchors had filed suit
against ACI claiming restraint of trade and tried to prevent publication of
ACI 355.2.   Could you please tell us who that manufacturer was?

I would like to know what types of fasteners are not able to satisfy this
criteria.

I would also like to understand the concerns that the members of the
committee had that lead then to invoke this requirement.

I should be noted that you can find the current draft of this standard in
the Feb 2001 edition of Concrete International along  with some history.


Mark Gilligan



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Message text written by INTERNET:seaint(--nospam--at)seaint.org
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For those on the listserver that design post installed fasteners in
hardened 
concrete, there are some major changes that are about to be adopted by ACI 
that will wind up in the IBC.  ACI 355.2 Test Method for Evaluating the 
Performance of Post-Installed Anchors in Concrete, has been adopted as a 
provisional standard and is open for public comment only until May 1, 2001.
 
Check out www.alertaci355-2.com for the complete standard and more info.

This Method will eliminate many types of fasteners that have been used 
successfully for decades.  Basically, the provision requires that almost
all 
anchor installations be able to pass testing in pre-cracked concrete.  This

includes cracks up to .020" through the centerline of the anchor.

Although this cracked concrete provision is certainly appropriate to some 
critical anchorage situations, there are many more common applications that

have performed flawlessly for years that will have to be done at a much 
higher cost.

There has been an incredible amount of discussion on this list-server about

the growing complexity of the building codes and how the practitioners
don't 
have an opportunity to speak out.  Maybe this will be the first exception. 

Someone once wrote, "Where are the bodies."  I'd settle for "Where is the 
damage."  More than a few months ago, another participant on the list asked

if anyone had any experience of a post installed anchor failure due to 
cracking of concrete in a tension zone.  No responses from 15,000 (?) 
subscribers.

Please contact ACI through the info on the website listed above if this 
standard concerns you.

Howard Silverman, PE
Covert Operations, Inc.
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