Journal of Light Construction senior editor reports that the American Wood Protection Association (AWPA) is about to publish an update to its U1 standard for preservative-treated lumber.

What this means is that everybody who builds decks is on notice that by the time the association's new rules go live, Cushman notes, all deck framing lumber, including posts, beams, and joists, will have to be treated to the AWPA's UC4A Ground Contact preservative retention levels. Technically, the new rules--likely to be adopted and enforced as local code--are all about which materials will hold up for durability and safety over the years, exposed to moisture and heat, and at the same time not leech toxic chemical treatments of the lumber into the soil. Cushman writes:

What does this mean for builders, remodelers, and deck contractors? Most likely, it means that treated 2x6, 2x8, 2x10, and 2x12 lumber in stock at your local lumber dealer or home center will now carry an end tag that says the material is suitable for Ground Contact. That's a change: in recent years, almost all the 2x lumber on the shelves has been rated 'Above Ground.'
Read more >