On 9/16/2016 4:20 PM, J. Clarke wrote:

It's a third of the thickness, 2/3 of the _width_ for a door. So a six
inch stile needs a 4 inch tenon.

Not necessarily ... and why gawd invented various types of M&T joinery.

Shorter, double, or twin, tenons at the joint (dead simple to do with a
tool like the XL Domino), and depending upon the thickness (with regard
to the amount of stock removal necessary that could weaken a critical
point) will often afford a stronger joint than a single 4" tenon.

I've built a number of large doors and don't consider the max tenon
length for the XL Domino to be practically limiting for most residential
door applications ... unless of course you're building a castle, or
doing timber framing.

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