Originally Posted by
Mark Bolton
We are 2.375 default on standard doors and drawers, I will go down to 1.5" rails on a drawer front. For us there is still plenty of meat there with a 1.125" tennon on a drawer front as a drawer front in our jobs sees zero abuse. They are pretty much fastened ridiculously through the drawer box, then the handle hardware, and see little to no abuse with regards to use. The front is pretty much like a board by the time it lands on the job. If the door construction is good hanging out in mid air a 6.5x18 drawer front is bullet proof.
I have no clue what a haunch would have to do with a commercial 5 piece drawer front but I can always dream.