[TowerTalk] Vertical on concrete pad

[GaryK9GS]

Several different ones planned but the largest a 80m 1/4 (DX Engineering ) which is 57 feet tall.


73,
Gary K9GS
-------- Original message --------From: W0MU Mike Fatchett <w0mu at w0mu.com> Date: 8/18/17  3:50 PM  (GMT-06:00) To: towertalk at contesting.com Subject: Re: [TowerTalk] Vertical on concrete pad 
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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