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How well do square trusses handle twisting forces?

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HumanPoweredDesigner

Well-Known Member
Joined
Sep 6, 2009
Messages
1,030
Location
Arizona
If a square truss spar has top tubes that are much stronger than the bottom tubes, for efficiency, and has every square diagonal wired, but none of the rectangle diagonals wired, how strongly could it resist twisting forces, compared to a round tube spar of similar weight and diameter?

Would wiring the square diagonals be sufficient, or do I also have to wire the rectangle diagonals?
 
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