[TowerTalk] Guy anchors for AB-577

Thu Feb 22 16:16:20 EST 2018

Hello-   The Hubble (old AB Chance Co.) "triple eye" screw anchor can be fitted with a pair of equalizer plates by passing a bolt through the eye and plates. Please see pictures of this, of which I did using the heavy-duty screw anchors and equalizer plates, on my QRZ.com page under W5FH.   Actually, AB Chance has an extension rod that attaches to the triple eye using a 1" bolt through the triple eye. This told me the acceptability of that idea with equalizer plates. The particular augers I am speaking of have either a single 10" or 12" auger and have 1.25" OD x 8' long high strength rods with triple eye.   I obtained an engineering write-up from Hubble regarding the suitability about using a 1" A-325 structural steel bolt through the triple eye to connect a pair of equalizer plates, just as shown in my pictures. I described to them how I intended to file down the ridges that form sections of triple eye. These ridges in no way affect the strength of triple eye, I did not want the 1" bolt to bear on the ridges.   One consideration about using the triple eye with a pair of equalizer plates is that the triple eye is fairly wide, forcing a separation of several inches between equalizer plates. I used 5/8" eye-eye turnbuckles and bought heavy thick hot dipped galvanized washers to keep turnbuckle eye centered between the plates. These are called dock washers. I used 5/8" A-325 structural steel bolts through the equalizer plates for the turnbuckle eyes.    I used the 12" auger in my concrete guy anchors, there are pictures of the rebar cages and layout before pouring concrete. I am also using the 10" augers screwed into the ground on another tower. Both augers have the 1.25" x 8' high strength rod with triple eye. The 10" ones have not moved any at all in over 2 years now on a 110' tower. Byron W5FH

      From: Andre VanWyk via TowerTalk <towertalk at contesting.com>
 To: John Langdon <jlangdon1 at austin.rr.com> 
Cc: Shawn Donley <n3ae at comcast.net>; towertalk at contesting.com
 Sent: Thursday, February 22, 2018 9:34 AM
 Subject: Re: [TowerTalk] Guy anchors for AB-577

I am curious how you would add equalizer plates for guying at 5 levels, which is what I plan to do for my 160m elevated vertical for 160m using Rohn 25G insulated 30ft from the ground. 
Anyone with experience adapting the Hubble triple eye screw in anchors to Rohn equalizer plates or another way of doing this?

The location of the vertical is not accessible for concrete trucks so if I can get away with using screw in anchors it would make this much easier. 
I plan to screw these in with a hydraulic auger mounted to a Dingo which is small enough to reach the location.  Being so wet here till later spring or early summer, this would shave a lot of time from my project too. 

Any pointers would be appreciated. 

73
NJ0F

Sent from my iPad

> On Feb 21, 2018, at 7:50 PM, John Langdon <jlangdon1 at austin.rr.com> wrote:
> 
> We used to use these for installing small wind turbines (2500 pounds and 8+
> meter blades turning at 100+ rpm with significant projected area, see
> https://www.nrel.gov/docs/fy13osti/56500.pdf for details of one
> installation). AB Chance has "distributors" who install these things - not
> cheap, but they have extensive soil surveys and engineering tables and when
> installed to a specified torque they give you a specific anchor strength to
> satisfy building permit and wind survival specs. A guyed tower with these
> anchors was usually cheaper than the alternative such as Rohn SSV.
> 
> 73 John N5CQ
> 
> 
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Shawn
> Donley
> Sent: Wednesday, February 21, 2018 4:20 PM
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] Guy anchors for AB-577
> 
> Depending on your location, time of year can make all the difference when
> installing screw anchors.  I used some Hubble/AB Chance "No-Wrench" screw
> anchors with a 8" diameter helix and 66" long rod.
> 
> 
> https://www.hubbell.com/hubbellpowersystems/en/Products/Power-Utilities/Anch
> oring-Foundations/Helical-Anchors-Piles/No-Wrench-Screw-Anchor/No-Wrench-Anc
> hor/p/1915218
> 
> 
> Tried to get them down into my ground of heavy clay/sand mix in early
> summer.  What a job !.  I had a buddy help.  A big fellow (think NFL
> lineman) and we still could not get one anchor fully in.  But early the next
> spring when the frost was gone, it was still cool, and the ground was soft
> under foot, I managed to get the problem anchor fully in by myself along
> with a couple of others.  Sometimes you have to go in a quarter turn, back
> it off a half and then drive down again.  Maybe tree roots, not sure.  Much
> easier in the spring but still a hard job that I would not want to repeat.
> 
> 
> If you can get your local power company to come out and put them in with
> their hydraulic tools (same as the ones they use to bore a hole for a power
> pole) that's the way to go.  In my case, the anchor spots were in the woods
> and no way for a truck to get back there.
> 
> 
> There's even a portable hydraulic installation tool for situations like I
> had.  WARNING.  If you've huffed and puffed to put screw anchors in by
> hand, watching this video might make you feel sick.
> 
> 
> http://videos.hubbellpowersystems.com/detail/videos/anchors---utility/video/
> 5062658445001/chance-portable-anchor-installer---hubbell-power-systems
> 
> 
> I saw some of our local electrical co-op lineman having lunch and asked them
> if they might stop by with one of these  portable installers.  Got the deer
> in the headlights look and after explaining what it was, and after listening
> to a string of cuss words, I learned that their company had no such device
> and they had no idea such a thing even existed.  If they had to install a
> pole anchor where they could not get the truck, they had to put it in my
> hand with a long bar and muscle just like us.
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