My coop is 6'x6'. There are 2x4's going up smack dab in the middle on each side. This would be a perfect place to attach a 2x4 as a roost (clear as mud? ). I figured 24" up is as high as I could go with only 3' on each side to jump down. Yes? I figure I only need one since it will be 6 feet long for 6 chickens. Will it sag if I lay it so they are roosting on the wide side? Would I need a center support? Sorry so many questions, the further I get into this the more I realize I don't' know anything about building. Good thing I bought my coop on Craigslist, I can't do too much harm to it adding a window, vents, roost and painting it.