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Re: Life span of painted steel

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Dear Alex

There is a National Guard Armory in Buffalo with 100' span trusses made
 wrought iron angles erected in 1884 that is still going strong.  They
appear to 
to have beem repainted only once.  I used Tnemec organic zinc primer and
top coat in an tunnel application where the steel ring beams where subject
to highly corrosive
ground water.  After 15 years, this painted system was in far better shape
than galvanized 
members installed at the same time.
> From: Alex C. Nacionales <anacio(--nospam--at)>
> To: seaint(--nospam--at)
> Subject: Life span of painted steel
> Date: Monday, January 11, 1999 3:48 PM
> Does anybody have an idea, experience or data on the life span of
> steel like trusses in an enclosed building like a gym, concert hall or a
> church using only paint as rust protection. Do you know of any steel
> or other structural steel member still existing after 50 years.
> Thanks in advance