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Since materials come in various thicknesses you would need to get information from the supplier. The sheets I have are 0.355" thick and one person could handle the 5x10 foot panel. Figure half the weight of plywood. Same applies to tubing alloy and wall thickness. Racing organizations (NHRA, NASCAR, SCCA) have their rules for frame safety and roll cages. Federal auto standards call for a static load on the roof of three times vehicle weight.
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