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/Anchoring-Foundations/Helical-Anchors-Piles/No-Wrench-Screw-Anchor/No-Wrench-Anchor/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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