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Galvanizing Bolts

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Raul,

Among other issues there are two main items you need to know.  First is
that hot dip galvanizing is thicker than mechanical galvanizing and second,
mechanical galvanizing is considerably more expensive.  For most outside
applications specify hot dip galvanized A325 bolts.  They are pretty much
"off the shelf" items.  Mechanically galvanized bolts are most likely a
special order which will cost more and delivery schedule could be an issue.
One exception is twist off bolts which are required to be mechanically
galvanized in order to meet their stringent torque requirements.

Thomas Hunt, S.E.
Duke/Fluor Daniel

----- Forwarded by Tom Hunt/DFD on 10/18/01 07:25 AM -----
                                                                                                                   
                    "Raul Labbé"                                                                                   
                    <rlabbe@ctcint       To:     "SEAOC" <seaint(--nospam--at)seaint.org>                                       
                    ernet.cl>            cc:                                                                       
                                         Subject:     Galvanizing Bolts                                            
                    10/17/01 07:23                                                                                 
                    PM                                                                                             
                    Please respond                                                                                 
                    to seaint                                                                                      
                                                                                                                   
                                                                                                                   




Colleagues,

Galvanizing A 325 bolts, . . . hot-dip galvanizing
or mechanical galvanizing. When prefering the use
of which ? Advantages and/or drawbacks of the
two procedures ? Are there any cases or situations,
where hot-dip galvanizing is a must ?
I'll appreciate any hint on this issue.

Thanks all

Raul Labbé




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