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Old 22-11-2011, 12:28 PM
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bmitchell82 (Brendan)
Newtonian power! Love it!

bmitchell82 is offline
 
Join Date: Jul 2008
Location: Mandurah
Posts: 2,597
Just thought ide drop a little bit of knowledge in on this.

A little while ago i ran basic analysis on the best sections to use for perm piers, and contrary to popular beleif a circular section isn't the best at all. Great in torsion but in bending not so.

If you can get your hands on 200 x 5 SHS which should be readily avalible from your local steel merchant, it will proform better. As for bolts and threads, i woudln't have gone anything less than M16 as M12 like has already been said will move a bit.

here is the link to my blog talking about it
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