Cole Dano said:You could also just run one dowel all the way across.
This is exactly what I planned on doing. I'm using 2x6's for my uprights. I will sister an additional 2x6 to each of the end uprights due to structural reasons (this thing is much bigger than stall bars), and have one (or two) 2x6 in the middle acting as the "separation" between the "double" stall bars but adding structural integrity to my 6' long dowel. FWIW I was recommended by a family wood worker to drill the holes in the middle upright 1/16" - 1/8" larger than my dowels just to make it an easier fit, but I'm skeptical because I want to eliminate any possibility of sag in the dowel.

