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RE: Corrosion from Non-Arsenic Wood Preserving Treatments

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There are a couple of articles available on line.
http://www.wwpinstitute.org/ Go to the newsletters and then to Summer 2001 fasteners.

This is from ACQ:
Fasteners for use with Preservemand Preserve Plus@tr eated wood include:
Hot-Dip galvanized, Stainless Steel, Other fasteners and hardware as recommended by the hardware manufacturer.

As a minimum requirement for use with treated wood, hot dip galvanized coated fasteners should conform to ASTM Standard A153 and hot dip galvanized coated connectors should conform to ASTM Standard A653 (Class G-185). For optimum performance and longevity in treated wood, fasteners and connectors fabricated from stainless steel should be considered. Other types of screws and connectors coated with proprietary anti-corrosion technologies are also available for use with treated wood. Consult individual fastener manufacturer's recommendations for information about the performance of their products with treated wood.

Electroplated galvanized fasteners are not normally recognized as being corrosion resistant for exterior applications. Aluminum should not be used in direct contact with CCA or ACQ treated lumber.

Regards,
Harold Sprague





From: "Willcox, Chris M." <Chris.M.Willcox(--nospam--at)GASAI.com>
Reply-To: <seaint(--nospam--at)seaint.org>
To: <seaint(--nospam--at)seaint.org>
Subject: Corrosion from Non-Arsenic Wood Preserving Treatments
Date: Wed, 20 Sep 2006 14:14:10 -0500

List Members,

I've been charged with coming up with a company policy for specifying
metal fasteners and framing accessories used with preservative-treated
lumber.  I would be interested to hear what others have done to address
the increased corrosion from most of the non-arsenic-containing
preservatives.  In particular: do you specify galvanized or stainless
nails, bolts, etc., and if so, for the whole project or just for
connections to treated lumber; and/or do you specify SBX for most
locations, and if so, what limitations do you put on it's use and do you
find that framers are able to get a hold of it.  Thanks in advance for
any responses.

Regards,

Chris Willcox, SE

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