Thanks. The coop is from the cheapest kit I could find. I'm not quite handy enough to build a decent coop on my own. And I bought the dog run panels from Menards. Total cost run and coop is less than $500. Not too bad considering what I would have paid a handy-man to build one for me. I hope it keeps my three chickens happy and safe. I'm planning to finish the roof on it this weekend.
Yes, the roof rafters are just threaded through the panels. I buried the two panels closest to the garage a little deeper than the others and I'm adding a second 12' 2x4 in the back that I will bolt to the garage for added support. That way the overlap of the roof panels works to my advantage and strengthens the whole structure. The kennel is a little more solid than chain link, and seems to hold up to the weight just fine. A friend and I actually dangled ourselves from the center support to test it out.
I'm glad that only slightly handy DIYers can still have decent coops for reasonable budgets, I was feeling kinda jealous of everybody's nice custom coops.