I guess it will all depend on how strict the county were I live wants to
be. They seem to think that my spec sheet from Rohn needs a official state
engineer stamp !!
Rohn is charging me $250 dollars for it.
So i can fight the county or pay for the "KANSAS PE" stamp. I think it is
easier to pay for the stamp.
73's Bill
On 8/21/07, jeremy-ca <km1h@jeremy.mv.com> wrote:
>
> All of Rohns spacings are non interger for that reason but I doubt equal
> spacing would have much effect on a short tower.
>
> My 180' 45G is guyed at 40/80/120/160 primarily since it is at the section
> junctions and also where I wanted to put the mounts for the big 40' boom
> 20M
> yagis. My guys are also broken up with insulators and the final footage at
> each level is different. Ive never noticed any vibrations at any wind
> speed
> at into the mid 90's.
>
> It shouldnt be hard, if necessary, to add vibration damping almost at
> ground
> level.
>
> Carl
> KM1H
>
>
>
> ----- Original Message -----
> From: <Cqtestk4xs@aol.com>
> To: <TOWERTALK@contesting.com>
> Sent: Tuesday, August 21, 2007 10:12 PM
> Subject: Re: [TowerTalk] guy levels ?
>
>
> >
> > In a message dated 8/21/07 10:08:41 P.M. Eastern Daylight Time,
> > 4cx250b@muohio.edu writes:
> >
> > I was under the impression that one shouldn't guy a tower at regular
> > spacings, because the wind can excite standing vibrational modes in the
> > tower that can lead to failure. In such modes, the vibrational standing
> > wave
> > nodes would be at the guy anchor points. I thought non-integer spacing
> of
> > guy wires was recommended to eliminate this possibility. Am I wrong
> > about
> > this?
> >
> >
> >
> >
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
> >
> > The engineers at Rohn who designed the spacings for the towers
> apparently
> > have no problems with this. They are all pretty evenly spaced.
> >
> > Bill K4XS/KH7XS
> >
> >
> >
> > ************************************** Get a sneak peek of the all-new
> AOL
> > at
> > http://discover.aol.com/memed/aolcom30tour
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
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> > TowerTalk@contesting.com
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> >
>
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>
>
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