I have a chicken run that is about 14' x 22'. The height is 6'. The top of the run is trimmed out with 2x4s. What is a good stiff wire covering for the top. I don't want to put any interior support posts. Is there a wire mesh that I can stretch over the top that is rigid enough that it won't sag in the middle? One inch chicken wire/mesh is too flimsy. I need something stiff so that with some tension it will hold evenly across the run. Any advice would be appreciated. I inadvertently posted this under the "Predator..." Topic. If you already answered this question there, I'll find it and.... Thank You!