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RE: Aluminum Stairs

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> -CanitzCF(--nospam--at) [mailto:CanitzCF(--nospam--at)] wrote:
> My concern is the leg (or any other part of the structure) which bears
upon the concrete. Isn't this a no-no? 

Oh yes.  Do not let aluminum touch concrete.  It's more than a dielectric
concern.  There will actually be an exothermic (mild) chemical reaction.

The original source for the reaction can be found in:

Monfore, G. E. and Ost, Borje, "Corrosion of Aluminum Conduit in 
Concrete," Engineering News-Record, V. 172, No. 26, June 25, 1964, 6 pp.

Mark Jones
Jacobs Engineering

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