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Re: [TowerTalk] Vertical on concrete pad

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Vertical on concrete pad
From: W0MU Mike Fatchett <w0mu@w0mu.com>
Date: Fri, 18 Aug 2017 14:50:28 -0600
List-post: <mailto:towertalk@contesting.com>
What size antenna are you putting up?


On 8/18/2017 2:17 PM, garyk9gs wrote:
Hello all,
I have an existing concrete base of several yards of concrete that i want to 
mount a vertical to.
I plan on using a 2 1/2 inch OD , 36 inch long, piece of steel or aluminium 
tubing (thick wall) with the end welded to a flat plate with gusset plates 
every 90 degrees.   This plate would bolt to the concrete with anchor bolts 
epoxied into holes bored in the concrete.
My questions:
1)  How do I calculate the size and thickness of the plate and gusset material?
2)  How many bolts and bolt diameter needed?  Bolt length needed in the 
concrete?
3)  Should I use steel or aluminum?  This is coastal FL so there is some salt 
to contend with.  Steel would probably be painted unless I can find a local 
galvanizing vendor.
4)  the other thing I thought of doing was boring a 2 1/2 + inch diameter hole 
and just epoxying in the tubing.  Not sure how to bore a hole that large and 
deep.  Maybe hire someone to do this?
Suggestions?  I don't wsnt to over complicate or engineer this either.



73-Gary K9GS
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