I know most people say it is pointless to build ur own frames but , I'm almost done with a jig for the sides through a router table....including to make the channels for the top and bottom bars. I'm getting it all mapped out soo all the components can be made from 2 x 4's. I'm lucky enough to own a good 13" ryobi planer soo that makes it possible to shave the 2x4's down to 1 3/8 .
The plan for the sides,which seem to be the hardest to develop is to cut the 2 x 4's to length ( med or deep),plane the pieces to 1 3/8, run them through the router table which set for the center of each end of the cut 2 x 4,cut a 3/4 channel then a 1/2 channel on the other end. Rip the 2x4 multiple times to give me a bunch of sides with the channels. Then run them through a simple jig for the planer to do the side downgrading from top to bottom.
For the top bars I'm thinking if just puttin a stop on my radial arm saw with the correct dado, and run it across the 2x4 on the 3 1/2 side (after they are cut to length of course). Rip the 2 x 4 to get a bunch of tops with the channels for the ears on the sides.take them over to the radial arm saw against the stop again and dado out multiple top bars....handles at once.
I made it sound wayyyyy more confusing than it is hahaha. But if I can bust out 100 un assembled frames an hour.....which I'm sure I can......I'll be golden. We are completely foundation less soo I'm not worried about the foundation channels.