>A true scale can be derived from only speaking lengths. > > Newton Yea but - two acceptable scales can be produced for any given set of speaking lengths, that are a ton apart in overall tension. I scare easily when looking at 30,000lb.+ tension numbers, and would sure like to know what the plate originally successfully held. If I were guessing in the dark, scratch building a scale from a set of lengths, I'd err on the low side. I'm not as immortal as I used to be. Ron N
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