I'm thinking about making a bimini type folding frame out of plastic 1 1/2" electrical conduit or sched. 40 pvc. The supports would be 7 and 8' w the bottom of both hinged together @ the same point. I'm hoping to have 8' of coverage when it is up and use lightweight tarp material for the top. Has anyone done this before or have any advice/opinions about the idea?