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Originally Posted by jcsaleen
Yes, I see what your saying... almost a roman arch effect like a keystone.
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It's actually the opposite. Roman arches work because they're in compression. Goose was talking about the structure being in tension due to internal pressure. Just like a tyre with the pressurised air inside.
Just because you see something done on a video, doesn't mean it's safe or even works.
I'd hate to see someone hurt or even killed because they think some plastic foam can make their car stronger than a roll cage will.