Pressure Treated

MRstark44

hey all. working on a deck for a customer, and i was just looking for some clarification. i am simply looking to gain a little more knowledge about how they grade/process the pressure treated lumber.

on the lumber label, it says: .40 .60 BRT

what does that mean?

also, there are three boxes that could be checked, they are

SYP i know this is southern yellow pine
PP
RP


i was also wondering if there was any way to tell what preservatives were used in the wood.

thank you very much, work hard, party harder. thanks.

neolitic

If you want to learn, start with these....
http://www.southernpine.com/index.shtml
http://www.preservedwood.com/
http://www.ufpi.com/product/prestret.htm

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(Sorry....it seems there really are dumb questions)

troubleseeker

Each piece will have a tag stapled on the end of the board, with the retention rate of preservative, and chemical used for treatment.