I'm building this run and I couldn't do it without your help!! This is facing the wind, which blows 25-30 mph, with gusts of 55+ on a reg. basis. It's been clocked doing much more, but that's not the norm. It's the reason I put the wind block on the bottom and I'll also build a solid door so that the chickens will have somewhere to go during the windy season (Oct-May). I plan on putting 2 x 6 roof joists at 24 ins. apart and putting corrugated roofing over half the run. I also plan on making a solid back wall half way down so that they are protected when it rains and snows. My big question now is, should I have put something other than a 2 x 6 at the top? It's not too late to change it at at this point. I was thinking on the end that will just have wire on it that it's fine, but now I'm wondering if the section that you see here with the 2 x 6 across it (it's 8 1/2 ft) is going to be strong enough? Everything is held together by Simpson strong ties.