Like many here, I didn't have a custom coop. We moved here last summer, and there were two 10'x20' sheds. Immediately I claimed one as the coop for my would be chickens. We lived in the city for the past 18 yrs, and the entire time I've wanted chickens. Now I have them.
Anyway, the man that lived here had put 2x4 boards where the rafters in a building are. They are turned with the 2'' part up. They were placed in order to store things in the top of the shed. I've worried about those not being suitable roosts. I even had a talk with my flock yesterday about not sleeping on their roosts, and sleeping on the floor in the nice fluffy bedding. Last night, for the first time, all chicks were up in the rafters sleeping!!! Even the little 4 week old chicks had managed to fly up high! All seem comfortable, and napping away.
I hope it doesn't harm them in any way. I tried to figure out a way to turn those 2x4, but there are slots cut into the side framing for those, and I'm afraid I don't know how to fix it.