Maximizing Strength: Square Tubing on Fulcrums

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The discussion explores the strength of a 2-foot long steel square tube placed on two fulcrums with weight applied at the center. It questions whether the tube can support more weight when laid flat or on one of its edges. The concept of "moment of inertia" is introduced, highlighting its relevance to the tube's structural integrity. The difference in moment of inertia between a square and a diamond shape is also mentioned as a factor in determining weight support. Understanding these principles is essential for maximizing strength in such projects.
RonArt
Interesting project. I was going to post my question as a standalone but I'll post it here first, as you refer to square aluminum tubing.

I've got a 2 foot long steel square tube, not a rod. If I were to place it on two fulcrums -- one on each end -- and hang a weight from the middle of the square tube, would the tube be able to support more, the same, or less weight if it were laid flat on the fulcrums or if it were laid with one of its 90 degree edges on the fulcrums?
 
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Are you familiar with the concept of "moment of inertia"? Do you know how the moment of inertia of a square and diamond differ?
 

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