Lawrence Wasserman wrote:


The grooves are not to identify the wood as PT per se, but are cut
into some species of wood to allow the treatment to penetrate
sufficently. Southern yellow pine is very common for PT lumber
because
it is one of the species that does NOT require this "incising" or
"slitting" to accept the pressure treatment.

Thanks. I had no idea what in the hell they were talking about. But
being in the south, the only PT wood I've ever seen is SYP and you
comment explains why I've never seen "grooves" in my lumber.

Bob S.