Return to index: [Subject] [Thread] [Date] [Author]

embrittlement of reinforcing bars when hot-dip galvanized

[Subject Prev][Subject Next][Thread Prev][Thread Next]

Hot dip galvanizing rebar is acceptable; see ACI 318 section 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.
Duke/Fluor Daniel

----- Forwarded by Tom Hunt/DFD on 09/06/01 07:32 AM -----
                    Blackburn            To:     "'seaint(--nospam--at)'" <seaint(--nospam--at)>                         
                    <nblackburn@f        cc:                                                                       
          >           Subject:     embrittlement of reinforcing bars when hot-dip galvanized    
                    04:36 PM                                                                                       
                    respond to                                                                                     

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.


Nicholas Blackburn

*   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) 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: