choices
after consulting with a couple of fabrication shops i found i couldn't have the top edge rolled into a box section and it was suggested, and the route i chose was to weld on a "c" section in place of the boxed top edge.
So the first thing was off to Metalmart for an 30 inch by 82 14 gauge sheet, another choice was to go with 14 gauge as 12 was thicker than the original and 14 was lighter. I got my handy son to write up a file for the water jet cutter and off i went to the shop. I also bought the whole 4'x8' sheet as I used lots of the rest of it too. I did have the same shop bend up two pieces into 1"x3"x1" C channel.
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