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

To: "Rick Scott" <>, "Towertalk reflector" <>
Subject: Re: [TowerTalk] Sorry to bring up an oldie - Mast Material
From: "Dave Hachadorian" <>
Reply-to: Dave Hachadorian <>
Date: Wed, 9 Mar 2011 13:56:31 -0700
List-post: <">>
>What would that look like for 6061-76 its yield is 40,000 I 

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:

Dave Hachadorian, K6LL
Yuma, AZ



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