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#10
16th November 2011, 11:11 AM
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There's a section in this book:
 about square/tube comparison - will see if I can remember to have a look tonight & paraphrase it. Tilly, if you can put up tube 'equivalents' for the usual box section(s) used that'd be great e.g 25mm @ 1.6mm = ?, 25mm @ 2mm = ? etc. Though rest assured we won't hold you accountable  
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