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Re: [TowerTalk] Screw anchors

To: "K0DAN" <>, <>, <>
Subject: Re: [TowerTalk] Screw anchors
From: "Mark Robinson" <>
Date: Sun, 30 Oct 2011 08:15:11 -0400
List-post: <">>
It might be worth installing magnesium sacrificial anodes in the ground to 
protect the screw anchors from corrosion. There was an article on how to do 
this in a past issue of QST. I installed these anodes.

Mark N1UK

----- Original Message ----- 
From: "K0DAN" <>
To: <>; <>
Sent: Saturday, 29 October, 2011 11:51 PM
Subject: Re: [TowerTalk] Screw anchors

> If you have reactive soil, do NOT put screw anchors directly in the soil
> (but rather anchor them in concrete). Over time, they WILL react to the
> soil, will lose their strength, and will eventually fail. If you doubt me, 
> I
> will send you some pix of a failed screw anchor which resulted in the loss
> of a 70+ foot tower plus the antennas and feedlines on it. These were good
> heavy duty screw anchors put into Missouri clay, and I was a assured by a
> noted Texas vendor that they'd be great. They lasted about 10 years and 
> then
> failed during a modest (50 MPH) wind storm. Don't make the mistake I
> yourself some grief, spend a little extra, do your research,
> check on your soil conditions, and follow the mfgr specs.
> 73
> k0dan
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>


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