I just hit solid rock at 3 feet for my Rohn 55 installation. Yesterday
I spent the whole day drilling 6 inch holes in the solid rock (4 holes
per base) and then gluing in 1/2 inch rebar anchors with Redhead G5
epoxy. Now my tower and guy anchors are going to be anchored solidly
to the huge plate of rock under my whole yard. Some tips.... Use a
big industrial Hammer Drill ( I used a Hitli TE 24) Rent or borrow as
they are expensive. Also for cleaning out the dirt down to solid
clean rock use a shop vac and just vacuum out the dirt. I don't see
the point of jackhammering out all that nice solid rock just so you can
replace it with concrete.
WD7Z
On Jun 23, 2005, at 10:12 PM, Al Toothaker wrote:
> I was very surprised at what can be done with a rented 'Bosch' type
> electric
> jackhammer. Work to be sure to get the broken pieces out but if you
> have
> the time and back, it may be easier than you imagine.
> Al
> N6TA
>
>> -----Original Message-----
>> From: towertalk-bounces@contesting.com [mailto:towertalk-
>> bounces@contesting.com] On Behalf Of K2EK@aol.com
>> Sent: Thursday, June 23, 2005 3:34 PM
>> To: towertalk@contesting.com
>> Subject: [TowerTalk] Guy Anchor Advise
>>
>> Hello all...
>>
>> Within the next few months, construction begins on my new hilltop QTH.
>>
>> Obviously, I am already planning for the installation of a pair of 45G
>> towers, which
>> for the heights I expect, Rhon specs (4A or 4B) call for guy
>> anchors at
>> a
>> depth of 4 feet.
>>
>> Enter the problem...
>> As the location is a typical northeast, rock prevails - it is
>> everywhere
>> and
>> in my case,
>> is gneiss - a hard granitelike rock. Out of the 6 anchor locations,
>> I
>> may
>> get lucky and find
>> 4 feet at one or 2 - in some places rock shows above the soil line.
>> Zoning
>> requirements plus the slope of the hill kind of limit siting the
>> towers so
>> I
>> really do not have the luxury of moving things around much searching
>> for
>> suitably deep soil. At best, I can rotate the guys around the tower
>> axis
>> a bit.
>>
>> I'd like to hear from anyone having solved installation in similar
>> terrain.
>>
>> I imagine I could have the rock hammered out, but intuitively that
>> sounds
>> expensive.
>> Rather than removing a lot of very hard rock, to just turn around and
>> re-
>> fill
>> with concrete wouldn't it be possible to drill a suitable hole and set
>> some
>> kind of anchor rod in it?
>>
>> 73 de Bill
>> K2EK
>> _______________________________________________
>>
>> See: http://www.mscomputer.com for "Self Supporting Towers",
>> "Wireless
>> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041
>> with
>> any questions and ask for Sherman, W2FLA.
>>
>> _______________________________________________
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>>
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>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers",
> "Wireless Weather Stations", and lot's more. Call Toll Free,
> 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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