[TowerTalk] Tower Leg Strength

[Keith Dutson]

For Rohn towers I have never heard of a leg failure caused by rust or other
aging for the 45G or 55G series.  The 25G series may be more vulnerable.

73, Keith NM5G

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of W0UN -- John
Brosnahan
Sent: Saturday, July 30, 2005 12:46 PM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] TowerTalk Digest, Vol 31, Issue 118

At 12:20 PM 7/30/2005, you wrote:
>John, do you have a best method for knowing how the internal state of 
>the legs will be?
>
>Thanks for the posting.
>
>73, George KR5C

That IS the problem!   You just can't tell for sure.   And I hate to risk my
life and limb not knowing.  There just isn't any sort of CHEAP
non-destructive
testing that I know of.    You might make a coil around the leg and measure
its resonance and Q and then move it to the area of question and see if it
is
the same.  If not then maybe the steel is flaking off on the inside.   But
then
again maybe any change is just due to the proximity of the concrete.  I am
sure there are some ultrasound methods, etc.

Best thing I can suggest is to LOOK very closely to see if there is ANY sign
of problems on the other legs.  And I guess you can tap on them to see if
they sound any different.  Poor mans ultrasound!

--John


_______________________________________________

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Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.

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