PT Wood Beam - Slice in 2

Apr 30, 2004 2 Replies

Can a 6" x 6" Pressure Treated Landscape Timber (treated for ground contact) be cut lengthwise into two 3" x 6" parts and remain treated?



Does PT really permeate the wood beam all the way?


ground

treated? No

Not nearly. It'll be obvious after you cut it.

Bob

According to MS :

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.

Some notes:

- 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.

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