I was not planing to put it at the top for that reason. The Rohn spec for
90' is for only 2 guy levels. So since the plan iI had for 100' was
canceled do to local county zoning I thought why not guy the 90' in 3
locations since i have all the parts now anyway.
So while the spec at for 90' @ 110 mpg shows the levels at 84' and 39' I was
thinking of 3 levels. Perhaps at 31' 61' and 84' But there is no spec
sheet to provide to my local government.
Is there any spec sheets for Rohn 45 with ice i wonder ??
Bill
On 8/21/07, Don Moman VE6JY <dmoman@mcsnet.ca> wrote:
>
> Unless the tower was heavily loaded and therefore required it, I would
> never put the guy at the very top. It is MUCH easier to work around the
> top of the tower if the guy is 5 feet down.
>
> 73 Don
> VE6JY
>
>
> ...If you are only using the top of your tower, I would place the
> guys at 30', 60' and 90'.
>
> John KK9A
> ***********************************
> 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?
>
> Jim W8ZR
>
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