[TowerTalk] Fwd: Fwd: Fwd: Screw Anchor Experience

[Andre VanWyk]

Knowing hams, the short answer is sadly no.

Next point of discussion will be analyzing the molecular composition of the minerals used to manufacture the anchors .... 

73
NJ0F

Sent from my iPhone

On Jun 22, 2013, at 10:17 AM, "Gene Fuller" <w2lu at rochester.rr.com> wrote:

> I couldn't resist this but, -
> Haven't we more than beaten the "Screw Anchor" subject  into the ground.
> Gene / W2LU
> 
> ----- Original Message ----- From: "Steve Maki" <lists at oakcom.org>
> To: "towertalk" <towertalk at contesting.com>
> Sent: Saturday, June 22, 2013 9:46 AM
> Subject: Re: [TowerTalk] Fwd: Fwd: Fwd: Screw Anchor Experience
> 
> 
>> On 6/22/2013 9:35 AM, I wrote:
>>> According to Anchor Guard, an anchor even all by itself can act as a
>>> corrosion cell:
>>> 
>>> "Basic Anchor Support Design Example 1. Figure 6 shows the basic design
>>> of a typical anchor support. The anchor support has all the necessary
>>> elements of a corrosion cell. The shaft itself acts as both anode and
>>> cathode as well as the electrical path between the two. The concrete and
>>> soil act as dissimilar electrolytes. The soil has less oxygen just above
>>> the concrete anchorage and consequently, less resistivity. The
>>> electrical path is the shortest between the anode and the cathode at the
>>> same point as the oxygen deficient soil, thus the deteriorating action
>>> of corrosion is most strongly in effect in this area. Experience has
>>> shown that this is the area most likely to deteriorate and cause the
>>> tower to fail."
>> One should note of course that Anchor Guard is in the business of selling anchor protection.
>> But it would seem that a prudent design would include insulation from the tower AND total encasement in concrete below ground level.
>> -Steve K8LX
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