I have an enclosure for my chickens when they're not in the coop. It is approximately 6.5x9.5, with the peak of the roof at about 6.5. There are no rafters or struts between the outer frame of tube-steel for the roof. This is fine for the chicken wire/hardware cloth. However, for winter, I need to cover it somehow to protect them from heavy snowfalls. I was using a tarp, but with our first 2-inch wet snow, it was sagging a lot. So now my plan is to put polycarbonate panels on top to act as a winter-time roof.
This will require additional supports. So my thought is that I would buy some clamps and tube-steel to add some structure across each side of the roof. The roof will be 3 panels wide on each side, so I was thinking 2 sloped supports on each side, and possibly 1 horizontal support on each side to keep the structure better. I assume because of the additional weight, I will need to add some vertical supports to each side of the structure, which has no mid-way supports except on the side with the door.
To do this, I think I will need 2 of the double-ended adjustable angle (I haven't measured, but believe it's about 110 degrees total), 12 of the 90 degree angle for the roof. and then 2 x90 degree for each vertical support I add on the end panels, 1x 90 degree and 1x adjustable degree support for each vertical on the long sides that support the angled part of the roof. Does this sound right? I've never worked with pipes before, only wood. But I'm not interested in wood for this.

If anyone else has done similar (or perhaps a greenhouse), can you please chime in with your opinions and recommendations? This is a big step up from the foldable cold frame that I made for my last project.