They are portable and were used for weather protection. I'm also wondering if I can make smaller versions of them but don't know what kind of poles they are. And the clamps I have seen before.
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looks like metal electrical conduit
My thoughts toolooks like metal electrical conduit
There are, what I used for my run roof rafters.So I found out there are BENDERS for electrical conduit...learned something new!
I found them on Amazon but they are a bit pricey...There are, what I used for my run roof rafters.
But....the kind of electrical work won't bend a big radius like in your pic.
Look up hoop house conduit benders.