make an upside down plunge cut to start the notch
use circular saw for crosscuts
Make Plunge Cuts and Crosscuts
Set the table saw fence to the proper depth, once again using the combination square measurement from step 1. Measure from the teeth of the saw blade.
Place the first side piece on the table saw and make an upside down plunge cut to start the notch (Image 1).
For the crosscuts, use a circular saw. To finish cutting out the notch, use a hand saw (Image 2).
Repeat these cuts for the second side piece.