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"I think that 2-3 sheets of what guage was it, 18 guage, steel would be far to stiff
to benifit from this foam"and "I still maintian that if the frame bends
enough it will load up the foam and the foam will crumble" should seal the fate. I'm in engineering myself, and have attended a few seminars about materials science engineering up at Ohio State University and he makes the point perfectly. To stiffen anything, it would require you to add something that is considerably stiffer than the original support to hold it in place. So as for its ability to stiffen a frame, that is complete BS
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