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Re: [TowerTalk] Guy anchor posts

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Guy anchor posts
From: jimlux <jimlux@earthlink.net>
Date: Mon, 31 Aug 2020 13:16:42 -0700
List-post: <mailto:towertalk@contesting.com>
On 8/31/20 1:08 PM, Richard (Rick) Karlquist wrote:
Before worrying about these issues, I would want to be
sure that the soil will support the load of the guy.
I went to a lot of trouble to build 12x12 inch "beams"
consisting of four 2x12's screwed together.  They
were buried 4 feet deep.  40 meter verticals (30 feet
long) were mounted on them.  During the rainy season,
the wind pushed them over at a 45 degree angle.  The
"beams" didn't fail, the soil did.

Rick N6RK

I suspect that's the most common failure mode for a post with no backstay. All the force is pushing on the top edge of the "hole". just like when you shove a shovel into the dirt and push the handle to bust loose the next shovel full. You'd need a really deep burial to resist this, so that most of the force is resisted deep down.


On 8/31/2020 12:14 PM, Rick Harrington wrote:
Given these 2 choices and everything else being equal, which would be the
strongest choice for a wooden post to attach a guy wire?

a)  2- 4x4 posts bolted together to make a single 4" x 8" post with the
eyebolt on a 4" face

b) a 6" x 6" post

Rick WR0H
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