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RE: Deformed bars - Permissible variation in weight

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All of the testing done for rebar in bond, anchorage, lap, etc. was predicated on testing of bars meeting the ASTM (I presume A 615 or 706).  Without compliance with the ASTM, that empirically derived information is void. 
If your particular application is fairly forgiving or conservative and you have assurance of the other parameters of the ASTM are in compliance, it is your judgment call as an engineer to accept the rebar or not. 
I would not accept the rebar.  I have been asked too many times to accept lesser quality.  When I was an iron worker, I would not even ask.  I would provide my work in compliance with the specifications.  If I screwed up, I would fix it.  Rebar suppliers are no different. 

Regards, Harold Sprague


From: sshahid(--nospam--at)
To: seaint(--nospam--at)
Subject: Deformed bars - Permissible variation in weight
Date: Wed, 12 Aug 2009 16:28:13 +0500

We have a situation where the test results give under weight bars (approx 15%), exceeding the 6% permissible variation in weight by ASTM. If we account for the reductions in weight/diameter by decreasing spacings and providing ample steel area, is there any codal provision restricting it.


Best regards,

Shiraz Shahid.


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