About how wide should I make the roost bars for 10-15 chickens? I am flexible on the height but don't want it super tall, probably like shoulder height on a 5" 4' person
Just not sure how wide to make it.

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so how wide should be the part their feet are resting? Is that the 4" of the 2x4?
I was thinking about making it like a ladder I guess I should have said that, so several rows angled back if that makes since.