I'm planning on building a run with Cattle Panels and T-Posts - no frame. I intend to attach an apron around the bottom. This post is my general model:
https://www.backyardchickens.com/threads/diy-thread-lets-see-your-inventions.631861/post-14292536
I have had a 16' panel used as a kiwi trellis for over 2 years and it hasn't moved. It has about 6' of opening space. Since my ground is not perfectly level, the lack of a frame makes it more flexible to the landscape.
https://www.backyardchickens.com/threads/diy-thread-lets-see-your-inventions.631861/post-14292536
I have had a 16' panel used as a kiwi trellis for over 2 years and it hasn't moved. It has about 6' of opening space. Since my ground is not perfectly level, the lack of a frame makes it more flexible to the landscape.