I have a question for the group: does anyone have info on how much a typical camelback st edge flexes? Or, to approach it from the opposite direction, how rigid is a 6 ft cameback?

If it is scraped to virtual master plate that is perfect, and then supported at either end, how much will it droop in the middle? I can supply some dimensions for my B&S 72 inch camelback if someone will volunteer put the numbers in an appropriate sw package to come up with at least an approximation...

The problem is not too much unlike a suspension bridge: the roadway is the scraped bottom surface, and above that is an arch in compression with an almost solid sheet connecting the arch to the scraped surface instead of suspension cables. The material is cast iron, so the parameters for gray ci should be a good approximation..... I would expect the sag would be less than what would result from a solid rectangular sheet of the same height (approx .5 in thick) on edge, due to the relatively heavy arch in compression.

If it is scraped to virtual master plate that is perfect, and then supported at either end, how much will it droop in the middle? I can supply some dimensions for my B&S 72 inch camelback if someone will volunteer put the numbers in an appropriate sw package to come up with at least an approximation...

The problem is not too much unlike a suspension bridge: the roadway is the scraped bottom surface, and above that is an arch in compression with an almost solid sheet connecting the arch to the scraped surface instead of suspension cables. The material is cast iron, so the parameters for gray ci should be a good approximation..... I would expect the sag would be less than what would result from a solid rectangular sheet of the same height (approx .5 in thick) on edge, due to the relatively heavy arch in compression.

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