----- Original Message -----
From: "Joe Barnes" <n4jbk@bellsouth.net>
To: <towertalk@contesting.com>
Sent: Thursday, June 05, 2008 6:31 PM
Subject: [TowerTalk] broken tower section
>I have a friend that has recently had a rohn 25 tower fall in a severe
> thunderstorm bending and breaking the section at the bottom. The tower
> is in concrete. Is there a best way to mate a section back to what is
> existing? Is is best to put a sleeve around each leg of the tower and
We need a little more information.
First I'm making the assumption that the tower is properly guyed as 25G is
not self supporting although that kind of damage sounds as if a guy broke
or the tower was free standing.
The fix depends on how tall the tower and what it has for a load.
There are proper ways to fix this and for short, lightly loaded towers you
can <gasp> do a "good enough" if good enough is well done.
> through bolt it? Is it best to sleeve and weld it? Is it best to cut the
> existing section off at the ground and use a rohn base plate? Or are
All of these depend not only the tower loading (how tall, what it has for a
load, and how well guyed it is) AND for installing a baseplate it depends on
whether the concrete pier is sufficient to be used as such. Generally the
concrete that has a tower set in it is crowned and would require some work
to accomodate a base plate. Again, for a small, well guyed tower the pier
doesn't have to be a monster and a bit of uneven-ness can be taken care of
with grout or epoxy. It needs to be large enough to support the load and in
most places has to extend a ways below the frost line (how far depends on
code) If the code is not applicable to towers such as here, you still put
the base in as if it did. Oterwise the frost would at least cause it to move
around and at worst, push it right out of the ground.
I'd suggest he get a local ham knowledgeable in this type of work to look at
it. A 5 minute glance should answer all these questions.
Roger (K8RI - ARRL Life Member)
www.rogerhalstead.com
N833R (World's oldest Debonair)
.
> there better suggestions? Thanks you, Joe N4JBK
>
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