I’ve made several out of PVC. Currently I have one that is 10’x20’x 2.5’ tall that I drag around the yard. I use the 3/4” 10’ sticks of pvc electrical conduit. It is more sun resistant. I make some kind of a joint every 5’ because it does sag. You can find about any type of joint needed if you buy “furniture grade” pvc joints. I zip tie chicken wire all around the sides and top but I do have an electric fence surrounding it to help with predators.
They are useful for chicken tractors because they are so light when they need to be moved.