I am cutting a new outlet in the wall between my living room and dining room. Below is an unfinished garage with completely accessible joists where I can run wire. There are double joists directly below the sole plate behind the wall.
I will build a jig for the 3/4" spade bit at the required angle (I calculated to be 18°). At the top of the sole plate the 3/4" hole has the required 1.25" clearance within the sole plate.
The "hole" in the joist below is at the top edge so it ought to be considered a "notch". The height of the notch is, uh, some old horse... around
2.5"... which is more than 1/6 the height of the 2x12...
What do you think? Can I do this?
Stepping away from the pen and paper for a bit, and thinking practically, I could easily cut a 2" notch in the joist, then my spade bit would fit in the notch easily and at a better angle. I don't have to cut the notch with the spade bit, you know.