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RE: Rebar breaking

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	This happened on one of my projects.  The steel used was A617 not A615.

bks

> -----Original Message-----
> From: Michael L. Hemstad [mailto:hemstad.ml(--nospam--at)tkda.com]
> Sent: Tuesday, October 07, 2003 10:57 AM
> To: seaint(--nospam--at)seaint.org
> Subject: Rebar breaking
> 
> 
> I have a project under construction using drilled pier foundations.
> Each pier has 6-#7 bars with 90 degree hooks, projecting from the top.
> 
> A backhoe working around the piers snags the hooks, and they break.
> They apparently don't bend and deform; they just snap off in the middle
> of the bend. They have broken perhaps 15 hooks so far.  I've never seen
> this happen, and suddenly it's happening a lot.  Call me a worrier, but
> I don't like it.
> 
> I am in the process of obtaining mill certs, and am considering material
> tests.
> 
> Is this problem seen often, and is there an identifiable cause?  Does
> anyone have any recommendations as to testing of the rebar?
> 
> Thanks for any help or advice.
> 
> Mike Hemstad, P.E.
> TKDA
> St. Paul, Minnesota
> 
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