[TowerTalk] Tower in Tree

[W7CE]

> >Doug Fir is the strongest North American softwood
>>species
>
> 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.

73,
Clay  W7CE