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Re: big dig structural failure - epoxy anchors overhead supporting gravity

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The quality of work aside, as a structural system, this installation has no redundancy.  Heavy permanent loads, likely dynamic loads (it was written somewhere that the ceiling was that heavy to prevent vibrations) - it should look very uncomfortable (to say the least) even on the plans. 
 
Every single life is priceless; but what if all that would happen during rush hour?
 
Steve Gordin SE
Irvine CA
 
 
 
----- Original Message -----
Sent: Friday, July 14, 2006 12:37 PM
Subject: RE: big dig structural failure - epoxy anchors overhead supporting gravity

Looks like the entire epoxy plug pulled clean with inadequate bond to the concrete, not the bolts pulling clean without epoxy on them.

 


From: S. Gordin [mailto:mailbox(--nospam--at)sgeconsulting.com]
Sent: Friday, July 14, 2006 11:56 AM
To: seaint(--nospam--at)seaint.org
Subject: Re: big dig structural failure - epoxy anchors overhead supporting gravity

 

Paul,

 

This is exactly how it looks.

 

 

Steve Gordin SE
Irvine CA

----- Original Message -----

From: Paul Feather

Sent: Friday, July 14, 2006 9:10 AM

Subject: RE: big dig structural failure - epoxy anchors overhead supporting gravity

 

<...> If the report is that the epoxy bolts pulled ?clean out?, it is most likely the holes were not properly cleaned of drill dust and latent material and the entire piece separated cleanly, bolt with epoxy and all.