[TowerTalk] Rohn 45 Bent Leg

[J. Hunt]

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 at gmail.com> wrote:

 Subject: Re: [TowerTalk] Rohn 45 Bent Leg
 To: towertalk at contesting.com
 Cc: w8qwdave at 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 at 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 at contesting.com]
 On Behalf Of
 > Dave
 >
 Leisman
 > Sent: Friday, October 21, 2016
 12:05 PM
 > To: towertalk at 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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