I don't know if I understand your question exactly, as I always have to look up "Braiding For The Really, Really Thick" whenever I braid bread.
It's a basic egg bread. The recipe is for one loaf, so after the first rise and punch down, I cut off a third of the dough and set that piece aside.
Next, I took the larger bit, divided it into three pieces, and fashioned each into a 12" rope. I braided those by going left under center, then right under the new center, and repeating.
After that, I took the small bit of dough I had left and worked that into three very narrow 14" ropes and braided them the same way.
Last step was to place the long, skinny loaf on top of the shorter, fatter loaf, tuck everything in, and let it rise.
It looked fab going into the oven, but the rise in the oven was a little uneven, or maybe I didn't have the thing distributed evenly, so it slid a little.