[TowerTalk] Guy Wire Anchors

[Grant Saviers]

I have to wonder if a permitting authority would allow these for 
permanent structures without a soils test and engineering, and costs. 
(Utilities run on different rules).  Then a truck and hydraulic system 
is needed to install them, more $$.  All of this beyond even advanced 
ham skills and technology.

A rental mini-excavator, some rebar ordered bent to spec, and a few 
yards of concrete can be DIY.  My (Rohn65) anchors are 2x4x6', full 
rebar cages, buried 4' all DIY with some laborer help.  One advantage is 
the shank before backfull is available to be tar coated and 0.020" gas 
pipe tape wrapped so there is no chance of corrosion failures.  (see TT 
posts of anchor shank failures).

My smaller prior R25 built to Rohn spec tower anchors and base were all 
hand dug, rebar bent on site and Sakrete mixed in wheelbarrows with 
friends and 807's..

Grant KZ1W

On 4/14/2020 04:02, Tyler Stewart via TowerTalk wrote:
> It’s like anything else, if engineered and installed properly there is nothing wrong with earth anchors.  Lots are in use at big stations for decades successfully.  Improper concrete based anchors are just as bad.
> Ty K3MM
> 
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>   On Tuesday, April 14, 2020, Rob Atkinson <ranchorobbo at gmail.com> wrote:
> 
> I've never owned a tower but I would think the guy anchors need to be
> set in a relatively deep hole that is filled with concrete.  I don't
> think I have ever seen a commercial tower that didn't have guy anchors
> in concrete.  I would not trust guying a tower by merely screwing any
> kind of anchor into the ground.  How tall is your tower?  Maybe 60
> feet of R25 is okay if you screw the helix deep, like 5 feet or more
> but if you live anywhere with high winds, or soft soil, lots of rain,
> or huge wind load like a TH7, I'd pour concrete.  It's money spent up
> front that saves on the replacement cost of a tower and antenna(s).
> 
> 73
> Rob
> K5UJ
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