Quote:
Originally Posted by Lireal
Can you be a little more clear? Which has less deflection, the tubing or the extrusion?
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Quote:
Originally Posted by GeeTwo
For a given amount of material and diameter, a hollow round tube will have the greatest moment of inertia (be strongest), with a hollow square tube being a little bit behind.
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That is, tubing is the stiffest shape there is for loads which may be required in every direction sideways to the length.