> >Doug Fir is the strongest North American softwood
> No kidding! I just looked it up on Matweb.com and the flexural yield
> strength is listed at 8100psi!
> The elastic modulus is about a thirtieth that of steel (1000ksi vs.
> 30,000ksi) , but the cross section of the tree is huge compared to
> Rohn 25G ...
Exactly! The tree is much stronger and more flexible than a steel tower. I
can't begin to estimate the wind load that the branches present, but it is
probably measured in 100's of sq. ft.
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