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Pete,
They have been holding up my 80 meter 4 square for over a dozen years 
and my 40 meter 4 square for about 5 years. 
They make them up to sizes suitable for utilities to use.
I used an electric jack hammer to install them.
Steve, NR4M
On 2/20/2018 3:18:PM, N4ZR wrote:
 After spending a frustrating afternoon trying (and failing) to drive a 
single helical guy anchor for my AB-577 tower, I'm looking for a 
better solution. I'm trying very hard to avoid excavation, concrete, 
etc.because I will need to restore the site to pristine condition in a 
few years. I came across a product called a duckbill anchor that 
claims 3000 lb working load in normal soil, and can be driven with a 
sledge or an electric jackhammer, leaving a cable end that is then 
pulledon to "flip" the anchor into its final position.
Anyone ever used these with a tower, AB-577 or otherwise?  Any reason 
not to give them a try? 
 
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