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Earth Anchors

Earth Anchors

Earth Anchors

(OP)
Hi,
Looking for these (photo below) typically used by utilities for bracing utility poles. Can anyone suggest how to get these in Alberta, Canada?
The obvious suppliers have stopped carrying them (Anixter, EECOL, Westburne, Graybar, Acklands Grainger, etc.) Others have gone out of business.
Maybe I'm missing something else that's obvious. Any ideas?





In case it needs to be said, I'm looking for any earth anchor that can offer more than 4000 pounds when installed in sandy soil, so if you know of an alternative to Hubbell, please speak up. The catalog page is just an example of what worked before.

RE: Earth Anchors

Check out "Grain Bin Anchors" Spar. You should be able to find a good assortment in Alberta. UFA may have something suitable available if not on the shelf.

--------------------
Ohm's law
Not just a good idea;
It's the LAW!

RE: Earth Anchors

Peavey Mart
Link

--------------------
Ohm's law
Not just a good idea;
It's the LAW!

RE: Earth Anchors

Maybe duckbill anchors could work for you instead of the screw in ones. If one isn't enough, you can drive is a cluster so the cables all meet at a common point.

RE: Earth Anchors

(OP)
Thanks,
Those are a good start. I don't have much optimism about getting an order from a US supplier across the border any time soon, however.
I also have some farm-store anchors which are much smaller than these and in my soil probably won't hold 1000 pounds, let alone 4k.
Duckbills are also on the small side. Manta Rays are much bigger. Maybe.

I'd still prefer screw in anchors because I'm having a contractor come to put in screw piles for the base of the tower (this is a wind turbine, for those who haven't guessed). The equipment to drive the piles can also drive the screw anchors, but these contractors don't actually have any of the screw anchors. A problem I hadn't properly anticipated.

FYI, the guy-wire pre-load tension is going to be up to 2000 pounds.

RE: Earth Anchors

I was thinking about screw piles. Will the budget handle screw piles for anchors?

--------------------
Ohm's law
Not just a good idea;
It's the LAW!

RE: Earth Anchors

(OP)
Umm probably not.
50$ VS 300$ each

I had a day off work today and spent some of it doing more research, spurred on by some of your suggestions. I've learned that there are at least 2 other manufacturers of these screw piles (Maclean and ECP). My original search may have been too specific, so I will re-visit some of the utility suppliers tomorrow.

RE: Earth Anchors

Check also "Grain Bin Anchors".

--------------------
Ohm's law
Not just a good idea;
It's the LAW!

RE: Earth Anchors

I've always wondered how to design the helix to the shaft... without doing a FEM study. Anyone have any suggestions?

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Earth Anchors

Have you looked for overhead line contractors to see if they have some in stock or know where to get them.

https://www.yellowpages.ca/search/si/1/Pole+Line+C...

Or google Pole Line Contractors


I wouldn't think the anchor in your picture could hold 4000lbs in sandy soil. Is it maybe the 6" or 8" one?


Yes, duckbills are generally too small for a single one to work. I didn't realize manta rays were a thing, just though they were bigger duck bills. But, to increase capacity you can drive in multiples all at different angles and group the cable connections all together.

RE: Earth Anchors

(OP)

Quote (LionelHutz)

I wouldn't think the anchor in your picture could hold 4000lbs in sandy soil. Is it maybe the 6" or 8" one?

With care, I believe so. It's a 6" plate. Being 5 feet down helps, the column of soil is pretty high.

RE: Earth Anchors

(OP)
Yes, the pole-line contractors could put them in, but ironically that would mean having a second contractor come to do the job. I've already got a guy coming to install the screw-piles, and his equipment will drive in the guy anchors if I just have them ready when he's here (next Wednesday). So technically, that's a solution, but way more expensive.

It's getting really annoying that search after search turns this up in US websites for 50 bucks each. My hurry, plus Hoser tax, will run me about 100$ each.

RE: Earth Anchors

Make your own! Those aren't technically difficult. Only odd part is the head. Use some form of swage lock.

Keith Cress
kcress - http://www.flaminsystems.com

RE: Earth Anchors

Just buy them from the pole line contractor....

RE: Earth Anchors

(OP)

Quote:

Make your own!
I thought about it. Galvanizing it would be a bother, too.

RE: Earth Anchors

Consider spray galvanizing or painting. You could also prime them then paint them with epoxy.

Keith Cress
kcress - http://www.flaminsystems.com

RE: Earth Anchors

If you're looking for an epoxy coating of any longevity, you should look into a proper high build zinc rich epoxy system. Any longevity requires time and money... no easy way out. Epoxy coatings often have significant 'cleaning' requirements... it all depends on how long you want them to last, and what your soil is.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Earth Anchors

They have to last long enough for everything to become used to being properly guyed. 😀

I’ll see your silver lining and raise you two black clouds. - Protection Operations

RE: Earth Anchors

If only temporary... like a month or so, do they need any coating system? I've done multistorey buildings without primer...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Earth Anchors

Wind loading may be excessive. Spar is in an area where wind storms overturn trucks on the highway.

--------------------
Ohm's law
Not just a good idea;
It's the LAW!

RE: Earth Anchors

(OP)
Surely my "lawn art" project shouldn't self-destruct in a month. O ye of little faith.
My old tower has been up since 2007, and I'm hoping for another 10 years service with the machine currently waiting to be lofted.
The contractor plans to arrive Wednesday PM. Which shortens my timeline to get the guy anchors again.

Before taking the paint idea too seriously, what do you think would happen to any paint after it's "screwed" into sandy/stony soil?
For the sake of argument, let's say the advance ratio of the auger-plate's helix is about 1 inch per turn. To get it 60 inches down would require about 60 turns. (I can attest to that, having installed these by hand for the previous tower (in my younger days). With a 6" plate having 12" circumference, then the surface of the auger has been dragged through 60 feet (20 meters) of sand and rock, under sub-surface pressure. Would any paint coating survive that?

RE: Earth Anchors

Have you looked for helical anchors?
They may be more readily available than the ones you show.

RE: Earth Anchors

probably better than no paint...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Earth Anchors

Can you find some sacrificial zinc blocks to fasten to the shafts?
Some zinc on the screw piles may be a good idea as well.

--------------------
Ohm's law
Not just a good idea;
It's the LAW!

RE: Earth Anchors

Yes, I know. Marine supply houses are not plentiful in Central Alberta. grin

--------------------
Ohm's law
Not just a good idea;
It's the LAW!

RE: Earth Anchors

(OP)
Problem solved!
And the answer was very close at hand.
When the contractor arrived, the first thing to do was to remove the old screw-anchors from the previous tower site. They all came up smoothly and examining their condition I was amazed to see very little corrosion. Having 6 removed from the ground + 1 left over that had never been installed, I picked the 4 best for the new site. Installation at the new tower site was easy.



The main reason for the contractor to be there, the structural screw piles for the tower base, went in very smoothly, too. Their installation torque was 15,000 foot-pounds (wow!) so much stronger than I expected. That pushes the load rating up to about 40,000 pounds so I'm looking at a safety factor of about 10!



Not that I'm planning such a thing, but that kind of load rating would make it possible for a future tower upgrade to a completely free-standing tower rather than one with guy wires.

RE: Earth Anchors

(OP)
I also just got the bill from the installer of the screw piles. I'm still happy.
Why do people pour concrete any more??? It costs less and there's so much less back-breaking work!

RE: Earth Anchors

At 15,000 ft/lbs, I wouldn't be standing so close. grin

--------------------
Ohm's law
Not just a good idea;
It's the LAW!

RE: Earth Anchors

Chicken feed... I used screw piles to support six 400,000 lb transformers... now that's a real load. I don't recall what the torque was but it was a lot greater. I'd asked that torque be recorded and they forgot to.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Earth Anchors

Well dang! That's no fun having what you need ON - HAND. Oh well, glad you got that covered.

No guys!, that would be great since guy-wires suck to be around, wrecking the visuals and being run into and tripped over.

Keith Cress
kcress - http://www.flaminsystems.com

RE: Earth Anchors

The piles work great. I put piles in for my new deck (walk out basement and roof over it, so needs to be well supported). So much easier than concrete and way quicker.

Did you drive the guy anchors vertical?

RE: Earth Anchors

If you think about it a screwpile is pushing down on the soil in a distributed manner all the way down its length, whereas a standard pile puts all the load on just the bottom of the pile. Seems a screw pile could be better and certainly easier to install by a bunch!

Lionel; You only have screw piles? No concrete blocks, no concrete foundation, no poured columns, no pier blocks?

Keith Cress
kcress - http://www.flaminsystems.com

RE: Earth Anchors

(OP)
The guy anchors are installed at 30 degrees from vertical.

There are lots of choices for large screw piles nowadays. I think the advantage is slowly becoming apparent in many places.
I was working with this company: https://almita.com/

Also found these guys (smaller stuff, since you're talking about decks): https://www.technometalpost.com/en-US/

RE: Earth Anchors

Under the deck, yes 4 piles along 36' of deck length 10' away from the house. They guy installed them with a mini-ex, would be similar to that skid-steer rig. I think it was something like 2000 ft-lbs of torque on the 2 holding the roof posts (roof is 24') and 1500 ft-lbs on the other 2. They have a screw on the end, not the entire length.

RE: Earth Anchors

Quote (puts all the load on just the bottom of the pile.)


friction piles utilise the full length... for compressive or tensile load.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

RE: Earth Anchors

Four piles for 36 feet of roofed decking.. I think I'm in love.

Got it dik.

Keith Cress
kcress - http://www.flaminsystems.com

RE: Earth Anchors


I'm not sure if these are what Spar used but they are common here in Alberta. Drive by most oilfield service company yards and you will see piles of them.

--------------------
Ohm's law
Not just a good idea;
It's the LAW!

RE: Earth Anchors

Did you try getting in touch with Hubbell Power? Chance was acquired by them, I have used used these power helix anchors on multiple jobs here in Alberta.

RE: Earth Anchors

(OP)
Yes, that was the starting point. From there I could not get to a wholesaler or retailer in Canada that had them or could get them in a reasonable time. That's all in post #1, and then we went looking for alternatives.

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