Somewhat, but not perfectly by any stretch. The inside of the
6x6 will be _much_ whiter. Still reasonably rot resistent - especially
the ground contact grade.
- a "6x6" is actually a 5.5x5.5, so slicing in half
yields something like a 2 5/8 x 5.5 (allowing for saw kerf)
- ripping 5.5" lumber isn't that easy a thing to do
unless you have a reasonably decent bandsaw, roller supports,
and likely wedges (to hold the kerf open). It'd need a 14" or even
16" circular saw. Doing two passes with a 10" circular saw is generally
unsatisfactory on construction lumber (you will have great difficulty
getting the cuts to line up).
- a ripsawn fresh PT landscape timber like this will probably twist
or warp very badly.
You'd be better off looking around for some "mini-ties", which I believe
are nominally 3x5s (2.6 x 4.5?)
If I _had_ to make up an odd size PT timber thicker than 1.5", I'd
laminate smaller boards, not rip a larger one.
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.
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