I use 1x4 framing for mine so it's 2 3/4" deep and add a 1x4 to the front lip for the second perch/roost, roosts are 16" away from wall for my roosters. I think 12-14" is typically recommended if you just have hens. My roosts are 10"-12" above poop board.
Wanted to add, thats a nice coop. In...
Roosts on left above auto door 14'. L it at the far end that gives you another 7' 6" roughly? I typically run 3- 3 1/2" wide roost bars, and my outside board on the poop board I make roughly that same thickness so my birds roost there also, especially the lower ranking hens.
Hey @JackHenry43 , welcome to BYC, your coop sounds nice and big. How many birds are you having in there?
As far as your roost bar dilemma, I haven't seen any configured like that. I seem to think it would cause too much ruckus at roost time with many birds trying to cram on certain bars. Then...