Bob, I'm in central IN (just south of Indy).
You’re definitely right about the ribs for strength. I’m thinking of at least 2 ribs per section. I was originally thinking of putting ¼” plywood over the ribs and then putting plastic wrap over that. Now I’m thinking of just using coroplast over the ribs. I’ve done woodworking projects for years so I tend to think that way I guess. Also, I’ll be posting pics shortly of the shape I’m thinking of.
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Lunarhighway, yeah I thought of doing a “hatchback” like that. There are a couple things I don’t really like that much about it. First, the hinge mechanism is going to have to be very sturdy (and if it's curved, you can only put one hinge in the center), particularly if I’m going to travel with it in “cargo” configuration. Secondly, if I haul something taller than the cab height I’d have to take the whole thing off anyway.
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