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Thanks h0ughy, I did a back of the envelope calculation and this pier design should have about the same lateral deflection for a given lateral force as the usual 150 mm to 200 mm steel tube with gussetts only at top and bottom.
The bottom gussetts are the most important as they have the highest bending moment.
In other words it is better than 150mm but not quite as good as 200mm tube mount.
Resonance should also be suppressed as there are no easy harmonics.
Bert
Last edited by avandonk; 30-09-2007 at 12:49 PM.
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