Subject: embrittlement of reinforcing bars when hot-dip galvanized
Date: Thu, 6 Sep 2001 07:52:28 -0700
Hot dip galvanizing rebar is acceptable; see ACI 318 section 188.8.131.52 and
ASTM A767, Standard Specification for Zinc-Coated (Galvanized) Steel Bars
for Concrete Reinforcement.
Your real problem is the welding of the rebar to the plate. This requires
preheat, proper weld settings/materials, and hope they did not dip it in
cold water when finished. We had a million dollar disaster on a previous
project where the field arbitrarily substituted rebar for Nelson studs on
dozens of embed plates. The fix was real ugly.
Thomas Hunt, S.E.
----- Forwarded by Tom Hunt/DFD on 09/06/01 07:32 AM -----
Blackburn To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
dgoak.com> Subject: embrittlement of reinforcing bars when hot-dip galvanized
Does any one have information supporting or denying that hot-dip galvanized
A706 rebar is embrittled during the galvanizing process. I have an embed
that is A36 plate with #4 A706 welded to it. The contractor has issued an
RFI with this as the basis for the requested alternate. It is a new one to
me and I don't see anything in the ACI or AWS literature.
* This email was sent to you via Structural Engineers
* Association of Southern California (SEAOSC) server. To
* subscribe (no fee) or UnSubscribe, please go to:
* Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you
* send to the list is public domain and may be re-posted
* without your permission. Make sure you visit our web
* site at: http://www.seaint.org