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On 27 Sep 2003 09:25:50 -0700, (Sanford) wrote:

Can any one tell me how thick it has to be?

Depends what you're sawing. If it's to guard against kickback caused
by twisting, then it can be as thin as you like (subject to strength
and stiffness limits) and you should align it closely to the
fence-side of the kerf.

If you're ripping poorly dried stock though, you want it as thick as
possible (still thinner than the kerf) to guard against case-hardened
stock pinching onto the blade. Cabinetmakers might never need this,
but timberyards (and construction joiners) will find it important.

--
Smert' spamionam