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[TowerTalk] Question about Mast Yield Strength

To: <towertalk@contesting.com>
Subject: [TowerTalk] Question about Mast Yield Strength
From: n2mg@contesting.com (Mike Gilmer - N2MG)
Date: 7 May 2001 12:51:43 -0700
> On 4/11/01 10:15 PM, Eric Rosenberg at wd3q@erols.com wrote:
 
> 1. The results of I get from using the MARC software 
> package tells me I can use a 2" OD pipe and/or 
> tubing with a wall thickness of .120...and 
> then lists a variety of mast material.  Does the 
> yield strength (listed as 35000 for 6061-T6) change 
> if the mast wall thickness is greater than 
> .120, say .250?
> 

Personally, I would avoid using aluminum in a 
situation like a mast that sticks out far above a 
tower.  The aluminum "work hardens" (I'm sure there's 
a scientific term for this) with time as it bends back 
and forth.  It then becomes brittle and breaks easily -
 just like what happens a lot to aluminum antenna 
elements.  Steel does not have this characteristic.

73 Mike N2MG

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