Matt, Drillers who will come out in rural south central Oklahoma aren't
in good supply. I searched a lot and found two. Best deal of the two
for a 5 ft diameter hole 8 ft deep was $2000 and I was responsible if
they broke a tooth and I was responsible for a commercial tow rig in
case they got stuck.
I knew they wouldn't get stuck but I have no experience re breaking
teeth on their machine so I was a tad leery and used a local "dirt
contractor" who charged $80 to dig my hole with a backhoe.
How does $2000 for 5 ft diameter 8 ft deep compare to your experiences?
This was for digging through clay, sandy clay and maybe some soft sand
rock. Sand rock is a local name for a type of sand stone that crumbles
by hand strength alone and digs pretty easy with backhoe.
Patrick NJ5G
On 1/20/2018 2:54 PM, Matt Lovewell wrote:
Drillers that can do it are all over the place... usually within a few hours of one another
depending upon the population base. The problem is that their machines generally are much
more expensive than a backhoe, so it usually wouldn’t be cost effective, even if
they’re located very close - unless they own a truck mounted rig and can run right
over. Usually around $450-600 per hour port to port and they have to have a second truck
bring the bits and caissons if needed and depending upon the company, job, and crew, another
machine to move the bits.
Lots of experience with that sort of thing. I’ve been hiring them for years.
Best,
Matt
K0KB
On Jan 20, 2018, at 2:05 PM, Clay Autery <KY5G@montac.com> wrote:
My tower actually calls for a cylindrical hole...
The hole should be engineered to support the load. Mine is 4 foot diameter x 8
foot deep.
Depth is generally more important than area beyond footprint and decent
overhang.
Please forward the driller info to me... I haven't found one yet!!!
And as of yet, I haven't found a mchine to rent.
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Richard Thorne <rthorne@rthorne.net> Date:
1/20/18 13:01 (GMT-06:00) To: Towertalk <towertalk@contesting.com> Subject:
[TowerTalk] Square Hole or Round Hole for Self Supporter?
I have an HDX-589. I'm in the planning stages for getting the tower
installed.
I ran across a driller yesterday that can drill the 10' deep hole to a
diameter of 7' (87" to be exact).
We have excellent soil here for self supporting towers, caliche. Digging
by hand is out and using a back hoe would probably make an over size hole.
Is there a reason not to use a cylinder vs a square hole?
Rich - N5ZC
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