Yeah you made sense. I already have 1 x 2 alum tubing that is two pieces that I have made a joint for and can put them together to span the width. I still need to support the middle of the bar with a chain or cable from above to get it level. The legs are 1 5/8" 14ga. the rest of the pipe is 18 ga. I didn't want to put any weight on the purlins and I want to hang the bar under the purlins so I can get the most width I can from the backdrop cloth. The bar is a little over 19'. The cloth is 22'. If I had too, I could stick something in the ends of the bar to get the full 22'.
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