online-shashki Forum Special Member
Join Date: Aug 2002
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FWIW, the sheets I recently bought from Lowes are .02595 lbs/in³. I know this because I'm building a new box with some irregular shaped bracing, so the easiest way to calculate internal volume was to weigh a piece with a known volume (a square piece I had already cut), then weigh each brace and calculate it's volume based on the measured density. I think most of these are oversized an inch in each direction, so a whole sheet from my Lowes should weigh around 92.5 lbs.