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RE: Aluminum Stairs

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That is my understanding also.  Austenitic stainless steel is also ok
against aluminum and concrete, but the non-conductors neoprene and PVC would
probably be better.  Between neoprene and PVC, I would choose neoprene.

Glenn C. Otto, P.E.
LIBERTY ENGINEERING, P.C.
Virginia Beach, VA

-----Original Message-----
From: CanitzCF(--nospam--at)aol.com [mailto:CanitzCF(--nospam--at)aol.com]
Sent: Tuesday, August 07, 2001 8:39 PM
To: seaint(--nospam--at)seaint.org
Subject: Aluminum Stairs


I'm presently designing a set of small aluminum stairs for a fabricator. The
high and low ends of the stringer are classically anchored to the supporting
concrete wall or floor with an aluminum clip angle(i.e., one leg is welded
to
the stringer; the projecting leg is anchored to the supporting concrete via
an expansion bolt). My concern is the leg (or any other part of the
structure) which bears upon the concrete. Isn't this a no-no? Should a
dielectric break (such as a neoprene or PVC shim) be provided between the
aluminum and concrete?

As always,
TIA,
Charlie Canitz, PE
Bel Air, MD

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