[TowerTalk] Unconventional Tower Installation

[Guy Olinger, K2AV]

Definitely time to take the land contours and go see your local PE. It
will be worth every penny. He will show your where to place anchors for
equalized stress on the tower, etc. The simple case that we can work on
is level ground.

The tower for WCPE-FM here in Raleigh was on uneven, sloping ground. You
shoulda seen the math on that. You have the same problem, just not the
huge altitude and weight multipliers.

You ever get ICE in your area?

- - . . .   . . . - -     .   . . .     - - .   . - . .

73, Guy
k2av@contesting.com
Apex, NC, USA

----- Original Message -----
From: Kurt Andress <K7NV@contesting.com>
To: Curtis, David B <david.b.curtis@intel.com>; Bob Allen
<bob@picturesperfect.com>; <towertalk@contesting.com>
Sent: Thursday, June 01, 2000 10:52 PM
Subject: Re: [TowerTalk] Unconventional Tower Installation


>
>
>
> "Curtis, David B" wrote:
> >
> > Hi Kurt,
> >    In the case of a tower with two+ sets of guys going to the same
anchor,
> > the trig doesn't work out simultaneously for all sets of guys. What
governs
> > in that case?  My guess would be to go with "equal or flatter"
vertical
> > angles.
> >
> > 73, Dave N6NZ
> >
>
> Hi Dave,
> In this case, you can't even get that for all guys. The lower uphill
> guys will have larger angles between the tower and guy, and the
downhill
> ones will have smaller angles.
> The only way to preserve the original configuration would be to use
> separate anchors, and even that gets goofy on the downhill side. And
> even at that, the thing will not really be the same as the guy lengths
> will be different resulting in elongations under load than the
original
> configuration.
>
> If it was the typical top loaded amateur tower with all the toys at
the
> top, and the deviations from the original are not great, you could
> probably get away with setting the anchors for the top guys and living
> with what that does to the lower ones.
>
> With lower side mounted antennas it could be a problem. The unequal
guy
> angles are going to result in different guy reactions, different
lateral
> tower displacements and different compression loads put into the
tower.
>
> It's stepping outside the box and and into the unknown until some one
> analyzes it, which is the best way to find out what to do.
>
>
> --
> 73, Kurt, K7NV
>
> --
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>
>


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