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#4449479 - 07/04/17 02:47 PM Driving all thread into the ground?
JHZR2 Offline



Registered: 12/14/02
Posts: 41805
Loc: New Jersey
Say 4'?

Need to have some threads in the ground, and shear is more the concern than pulling out. I have a rotary hammer with sds plus connector, and have seen some ground rod hammer adaptors for that.

Is it doable? What would my concerns be? Id use threaded rod of 1/2 or 5/8" size, and could grind a point into the end of it if that somehow helps. I could also cut the hammered section (leave it a little long) and chase the threads.

The other option might be to drive a ground rod and then use a die to cut threads.

Thoughts/recommendations?

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#4449496 - 07/04/17 03:02 PM Re: Driving all thread into the ground? [Re: JHZR2]
Kira Offline


Registered: 08/19/10
Posts: 5263
Loc: Champlain/Hudson Valley
All for electric grounding? How deep is code? I've done it a couple of times with a hammer (lucky, I guess) but someone else was in charge.

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#4449503 - 07/04/17 03:15 PM Re: Driving all thread into the ground? [Re: JHZR2]
JHZR2 Offline



Registered: 12/14/02
Posts: 41805
Loc: New Jersey
No. Nothing to do with electrical grounding at all. A ground rod is just an option to get a piece of metal intended for driving in the ground.

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#4449578 - 07/04/17 04:29 PM Re: Driving all thread into the ground? [Re: JHZR2]
Fattylocks Offline


Registered: 12/21/16
Posts: 45
Loc: Lemont IL
How hard is the ground and how deep do you have to drive the rod in?
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#4449586 - 07/04/17 04:39 PM Re: Driving all thread into the ground? [Re: JHZR2]
NStuart Offline


Registered: 12/28/16
Posts: 278
Loc: Sav ga
Double nut it, beat on it, unscrew....threads should be fine
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#4449615 - 07/04/17 05:11 PM Re: Driving all thread into the ground? [Re: JHZR2]
LoneRanger Offline


Registered: 07/02/07
Posts: 4062
Loc: Midwest USA
I thought this was going to be about trolls killing valid discussion threads on the forum . . .
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#4449687 - 07/04/17 06:01 PM Re: Driving all thread into the ground? [Re: JHZR2]
JTK Offline


Registered: 08/14/03
Posts: 10592
Loc: Buffalo, NY
It's going to corrode and deteriorate over time obviously, but should be fine for a long time provided you can get where you need it.
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#4449691 - 07/04/17 06:06 PM Re: Driving all thread into the ground? [Re: LoneRanger]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: LoneRanger
I thought this was going to be about trolls killing valid discussion threads on the forum . . .


I thought it was going to be about threads that have lasted way past their useful life.

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#4449848 - 07/04/17 08:37 PM Re: Driving all thread into the ground? [Re: Fattylocks]
JHZR2 Offline



Registered: 12/14/02
Posts: 41805
Loc: New Jersey
Originally Posted By: Fattylocks
How hard is the ground and how deep do you have to drive the rod in?


We have sandy-organic mix. Drains well.

Im thinking 4-ish feet down. Shouldn't hit water table until we go 10 feet based upon where water sits in the sump hole in my basement.

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#4449910 - 07/04/17 09:54 PM Re: Driving all thread into the ground? [Re: JHZR2]
SHOZ Offline


Registered: 06/28/03
Posts: 5751
Loc: Illinois
It will pull out rather easy if it's under a load. I've used 3/8" x 4' before and removed it every fall for a greenhouse. If left to rust up it then holds very well.

You could slip the top foot with some PCV pipe to help with lateral pull.
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#4450090 - 07/05/17 06:47 AM Re: Driving all thread into the ground? [Re: JHZR2]
JHZR2 Offline



Registered: 12/14/02
Posts: 41805
Loc: New Jersey
So you drive it with a hammer? 3/8 is a good deal smaller than the 1/2 I'm considering.

Longevity is less of a concern than feasibility.

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#4450104 - 07/05/17 07:14 AM Re: Driving all thread into the ground? [Re: JHZR2]
supton Offline


Registered: 11/09/08
Posts: 12004
Loc: NH
Since it's shear you are worried about and not tension I'd think about using a GND rod, and then adding the clamps that are used to attach solid core wire. They have threads for a screw on them, although you could perhaps tap the clamp or building something from those. Use multiple clamps if necessary.

I think you can get 4 foot rods also.
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#4450107 - 07/05/17 07:18 AM Re: Driving all thread into the ground? [Re: JHZR2]
SHOZ Offline


Registered: 06/28/03
Posts: 5751
Loc: Illinois
Originally Posted By: JHZR2
So you drive it with a hammer? 3/8 is a good deal smaller than the 1/2 I'm considering.

Longevity is less of a concern than feasibility.
Yes I put a nut on top and pound it in. Usually very easy when the soil is wet. I've used a hammer drill before with dryer soil. And put a point on the end of the all thread.
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#4450118 - 07/05/17 07:35 AM Re: Driving all thread into the ground? [Re: JHZR2]
doitmyself Offline


Registered: 06/03/02
Posts: 6231
Loc: MI
Originally Posted By: JHZR2
So you drive it with a hammer? 3/8 is a good deal smaller than the 1/2 I'm considering.

Longevity is less of a concern than feasibility.


We use T post fence pounders to install 8 ft.electric fence ground rods. For 3/8", maybe put a pvc pipe sleeve over it to reduce side bending and just cut off the pvc one ft. at a time as you proceed.

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#4450134 - 07/05/17 08:02 AM Re: Driving all thread into the ground? [Re: JHZR2]
SHOZ Offline


Registered: 06/28/03
Posts: 5751
Loc: Illinois
I just used a post driver like that to put a 8' x 1/2" ground rod in a couple weeks ago. The soil was not really wet and I had to use a #3 hammer to finish it.
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