On 2007-03-07, Jim Conway wrote:

Not entirely true. Wood that's treated to refusal is not full depth
treatment. All other PT should be, otherwise you'd never even be
able to crosscut it....

It is entirely dependent up what the local softwood framing lumber
species is. Douglas Fir does not absorb the treatment chemicals well,
even with incising, so it is proper to treat all the cut ends.
Southern Yellow Pine, on the other hand, absorbs the chemicals so well
that it is not incised, so I believe treating the cut ends is not
needed in that case.

Cheers, Wayne