Dave,
We had a local 180ft commercial tower damaged in a similar manner. A local
tower crew built a form on top of the existing pier up about a foot above
the damage, inserted dozens of pieces of small rebar in and around the
tower and then poured the form full of concrete.
That was in about 1988 and the tower is still standing and heavily loaded.
This is probably not an _approved_ way to repair but it certainly worked.
I was a little freaked out by it at first but climbed it many times in the
next several years after the repair.
Regards,
Kevin C. Kidd, CSRE/AMD
Lawrenceburg, TN
AM Ground Systems Company - WD4RAT
kkidd@kkbc.com -- 866-22-RADIO -- 866-227-2346
www.amgroundsystems.com
On Fri, Oct 21, 2016 at 11:05 AM, Dave Leisman <w8qwdave@casair.net> wrote:
>
> 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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