[TowerTalk] Small free-standing to Bigger free-standing

[AA6DX]

Well, I've used a Bosch electric jackhammer successfully to roust tower
bases, so, guess I  CAN  dent them .. but ...then ... I have a few extra
pounds to put into the effort, too!  HI ...  Remember that concrete hardens
with age .. more so and more so ... so..... way old bases with high psi
would be harder to do.  If you can, simply put down a new base adjacent to
the old .  I've seen hams get  rid of an old base by using an electric
jackhammer to "delete" it down 2 feet or so (below rototiller digging level)
and cover it up!
73 --- Mark  AA6DX
----- Original Message -----
From: <K7LXC@aol.com>
To: <PBARKEY@gw.bsu.edu>; <towertalk@contesting.com>
Sent: Wednesday, March 29, 2000 8:54 AM
Subject: Re: [TowerTalk] Small free-standing to Bigger free-standing


>
> In a message dated 03/29/2000 8:40:35 AM Pacific Standard Time,
> PBARKEY@gw.bsu.edu writes:
>
> > Have you ever tried to break up a buried concrete base
> >  with an electric jack hammer?  It can't be done.
> >
> >  Believe me, I've tried.  You won't even dent it.
> >
> >  When I left my Ohio QTH, I spent big bucks renting
> >  a Bobcat with a nitrogen powered hammer on a
> >  big arm that only managed to break up the base
> >  down to the point where I could hide it with 0.5
> >  inches of top soil.
> >
> >  To break up the base, you'd have to lift the thing
> >  out of the ground.  But to do that, you'd have to
> >  dig around it anyway.  Either way, its a lot of work,
> >  but I'd go for drilling the holes needed for the
> >  rebar to tie it to the expanded foundation.
>
> Hi, Pat --
>
>       Thanks for your 'real life' comments. I've only been around a couple
of
> instances where the rented jackhammer technique was applied but it seemed
to
> work. Perhaps they were working with 3kpsi concrete and yours was 5kpsi or
> something. I don't remember how much of the concrete they removed either.
>
>      For commercial jobs I've hired a backhoe that had a jackhammer on it.
He
> not only broke up the concrete but also picked it up and hauled it away.
>
>      But maybe for the effort involved, using Hank's method of
rebar-coupling
> is the way to go. And thanks to the great group at TowerTalk, we've got
some
> real comments and options that'll make it work.
>
> Cheers,   Steve    K7LXC



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