wrote in message
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On Wed, 21 Jul 2010 13:27:06 -0700, "Califbill"
wrote:

Nope, the copper is not friendly to aluminum in a wet inviroment.
Is ther copper in pressure treated plywood?


Yup. Used to be copper arsenate (CCA). Now it is a copper only solution.
http://www.strongtie.com/productuse/PTWoodFAQs.html


You can still get CCA lumber at a marine supplier.


I know, but at least here, could not find any in the San Francisco Bay area.
Maybe Oregon.