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Juergen Hannappel
 
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Default Wood Question: Which is stronger, a round post or square post?

McQualude writes:

I found this question in another group (misc.rural)...
Which is stronger, a round post or square post? Assume the posts are
both made from the same wood and are both equivalent in width.


What dou you mean by "equivalent" in width? Same diameter as length
of side of the square? Then the square is stronger, because the
additional material in the corners adds considerably to the
geometrical moment of inertia.

If "equivalent" is meant that the same strength is reached there is no
difference...
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Dr. Juergen Hannappel http://lisa2.physik.uni-bonn.de/~hannappe
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Physikalisches Institut der Uni Bonn Nussallee 12, D-53115 Bonn, Germany
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