Has anyone seen a photo or two of the damaged tower section?
The amount of damage could affect the corrective actions.
I've been professionally repairing towers / antennas due to weather or
accidental damage (vehicle collision) for many years and not one has been
identical.
Thanks,
James
--------------------------------------------
On Fri, 10/21/16, Raymond Benny <rayn6vr@gmail.com> wrote:
Subject: Re: [TowerTalk] Rohn 45 Bent Leg
To: towertalk@contesting.com
Cc: w8qwdave@casair.net
Date: Friday, October 21, 2016, 2:08 PM
Dave,
I'm not a structure engineer either, but an easy short term, or long term
fix, depending on how you feel about it, is to U bolt on a piece of
1/4" or larger by 1 1/2 in to 2 1/2 in angle iron over the bent area. If you
use
enough U bolts, around the leg and over the angle iron, you may be able to
almost straighten the bent part. You could also use a large strip of flat
steel between the leg and U bolts so not to crush the leg. It would help to
tap on the diagonal cross support to help straighten the vertical leg too
as you tighten the U bolts..
I did this same thing on a 120 ft of R25 tower. This piece angle iron was
left on the leg and lasted until the tower was taken down.
Ray,
N6VR
On Fri,
Oct 21, 2016 at 11:09 AM, Hardy Landskov <n7rt@cox.net>
wrote:
> Dave,
> Just a FYI, the bolts you are using are
not for Rohn tower. The correct
> bolts
are made for Rohn by someone and supplied when you buy the
tower
> sections and the bolt package so
that the threads that stick through are
>
not
> in the shear plane of the bolts.
They are galvanized, not stainless steel.
> They are very close tolerance also. Not
your ACE hardware overpriced junk.
> I
had a professional tower erector here to tell me the good,
the bad, and
> the ugly and we got it
right when I put up my 110 footer. He used to put up
> 1500 foot TV transmitting towers in Tampa.
If you want his email I can send
> it. He
can help you.
> Hardy N7RT/4
>
> -----Original
Message-----
> From: TowerTalk [mailto:towertalk-bounces@contesting.com]
On Behalf Of
> Dave
>
Leisman
> Sent: Friday, October 21, 2016
12:05 PM
> To: towertalk@contesting.com
> Subject: [TowerTalk] Rohn 45 Bent Leg
>
>
>
I need some advice. I have a 70' Rohn 45 and had a guy
with a tractor back
> into and damage one
of the legs. As well, the leg was hit hard enough to
> bend the diagonal cross support. I could
probably, with assistance of a
> come
along, bend the leg back into place and bend the diagonal
support back
> into place as well, but
that would not resolve the huge indentation which
> resulted from the contact with the
tractor., e.g., the leg's strength would
> still be compromised. There is no
antenna on top of the tower; I was just
>
getting ready to place my TH-11. The tower is guyed at
30' and 50' at the
> current
time.
>
> My thought
is to rent a mobile crane with a boom long enough and
> significant
> enough to
lift the 6 sections above the damaged section, in total
(still
> bolted together) from the
damaged section; then cut the damage away from
> the
> damaged section,
and then lower the 6 sections down to the now repaired
> section, drill all the holes and bolt
everything back together. Is this
>
possible? I am concerned about climbing the tower, because
of the damage
> done to the leg - because
somehow I need to strap the 6 undamaged sections
> to the boom of the crane.
>
> Another question is
whether the stainless steel bolts holding the 6
> sections
> together are
sufficiently strong enough to hold the 6 sections
together
> while I work on the damaged
section.
>
> I really
don't want to start over because that means another hole
to dig,
> expense of more concrete,
placement of additional guy wire anchors (and
> more
> concrete), and
waiting until late spring.
>
> Any advice would be appreciated.
>
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