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[TowerTalk] Rohn 25G tower permitting...

To: towertalk@contesting.com
Subject: [TowerTalk] Rohn 25G tower permitting...
From: bcarling@cfl.rr.com
Date: Thu, 29 Jan 2015 11:55:44 -0500
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
UPDATE and QUESTIONS

Thank you for the guidance and help you guys provided so far.

I have decided to switch to using some tower materials of known specifications 
rather than 
the three 8 foot aluminum sections I had. (of unknown brand and 
characteristics.)

So this will now be a 29 foot Rohn 25G tower with the bottom 3 feet buried in a 
reinforced 
concrete base. 

I noticed that the Rohn specifications (PDF) only include calculations for 40 
foot (or taller) 
towers  using 25G sections. It's good that Rohn has something though.  They 
seem to meet 
the 139 mph / 3 second gust requirement too. Perhaps we can adapt their 
calculations?

I plan to have a steel mast that extends about 4 feet out the top and has a 
WARC bands 
Cushcraft 3 elemet 17m/12m yagi and a 3 element 6 meter yagi (Cushcraft)( all 
of which 
have specifications.)

Is there anyone who can help me come up with engineering calculations and 
drawings that 
will satisfy my local city permitting people?

I presume the task will be easaier  now that we have some known factors and 
characteristics 
of the materials. My son is an architect and can do the drawings, and he knows 
a structiural 
engineer who might possibly be willing to help with the calculations. Am I 
heading in the right 
direction here?


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