Tom-
Like the ad says, "Wider is better". The figures quoted might better be
defined as the "minimum recommended. My guess is that most people would
like to have the anchors closer to the tower, if that were acceptable,
since they could have a bigger tower with more antennas on a smaller
footprint.
Think of the tower as a lever arm pulling on the anchor. The closer the
anchor is to the base, the less force on the tower it would take to pull
the anchor free.
73-
Fred Roberts, W6TKV
Riverside, CA
Tom Whiteside wrote:
> My question relates to how widely I can space guy wires on a Rohn 45
> tower.
> I would like to go beyond the approximately 0.8 ratio suggested by
> Rohn to
> accommodate the turning radius of a beam that will be mounted on an
> IIX gate
> lower on the tower... The situation specifically is a 130 foot
> Rohn45
> tower that will have a 20M monobander at 132 feet with additional 20m
> beams
> at 90 feet and 47 feet. The guys would go at 35, 78 and 121 feet per
> the
> Rohn recommendation but the guy anchor would need to move from Rohn's
> recommended 104 feet to to 120 feet to accomodate sag and the required
>
> turning radius on the gate... We officially live in a 70 mph county
> and
> the Rohn specs at 104 feet are to 90mph... I'm a believer in
> following
> manufacturers recommendations but is this something that can be done
> safely
> and at what wind load consequence?
>
> Tom Whiteside
> N5TW Georgetown, TX
>
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