I'm not sure exactly what your saying with "Bending them together", but for a super simple "greenhouse", I used PVC shaped the way I wanted and covered in the film. The benefit was I could take it apart as soon as I no longer needed it. I used REALLY heavy PVC, but that's not really needed. As long as it won't blow away, you're good. I tied mine to cement blocks last year.
This year, I built a 7" x 8" ( approx ) greenhouse that is pretty much like Indy Gerdner's. Well, it's built, but today I will cover it in film. His thread is in the seed starting area of the forum.
Here is a link:
https://www.helpfulgardener.com/forum/vi ... 50&t=51007