[TowerTalk] Sorry to bring up an oldie - Mast Material

[Dave Hachadorian]

>What would that look like for 6061-76 its yield is 40,000 I 
>believe.
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Safety factor f  2
Wind loading factor k    .004         lb/ft2/mph2
Maximum stress S      40,000       psi
Outside diameter D        2     in
Inside diameter d       1.5      in
Total length of mast        8     ft
Height above support h     4        ft
Antenna 1 height h1           4  ft     area a1    6.1     ft2

Survival velocity:     93.2 mph
Failure velocity:     131.9 mph
Weight of mast:     37.47 lbs

That's for 1/4" wall.

By now you should have enough examples to figure out how to use 
the mast calculator by yourself, for other materials and sizes:
http://www.math.niu.edu/KARC/mast/


Dave Hachadorian, K6LL
Yuma, AZ
































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