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Pier tube materials
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07-09-2012, 08:59 AM
DaveGee
(Dave Gault)
Occultation Observer
Join Date: Aug 2006
Location: Blue Mountains, Australia
Posts: 232
Quote:
Originally Posted by
bojan
OK, provided it's filled with concrete
Hmmm, 300mm dia concrete.
Even heavy steel will ring like a bell unless it's heavily braced = $$$
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