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

 To: "Rick Scott" , "Towertalk reflector" Re: [TowerTalk] Sorry to bring up an oldie - Mast Material "Dave Hachadorian" Dave Hachadorian Wed, 9 Mar 2011 13:56:31 -0700 mailto:towertalk@contesting.com>
 ```>What would that look like for 6061-76 its yield is 40,000 I >believe. --------------------- 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 . _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk ```
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