To be safe, do not rely on opinions. Get your advice from either the
manufacturer or a registered professional.
73 Keith NM5G
On Tuesday, July 27, 2021, 02:49:25 AM CDT, Jari Jussila
<jari.jussila@oh2bu.pp.fi> wrote:
Hi ...
I'm sure these topics have been discussed earlier, but could not find
any thread ..... Sri ...
We are at our club erecting two towers. A rotating steel tower being 31
m high and a aluminium telescope mast 18+18 m = 32 meters.
A) How critical is the rule that guy wires should be "exactly" 120
degrees apart?
A professional guide says, that the anchor point can be 50 mm from that
120 degree (119,9-120,1 degree) but some say, that a maximum of two
degrees is OK. That meaning 118-122 degree.
What's the tower community advise?
B) The steel tower height is 31 m - it's a rotating tower - but the
upper bearing is at 23 m ( leaving 8 meters for the antennas) and the
lower bearing at 11 meters.
Whats the advise of anchor point distance? Some say, that the 60 %
(distance for the tower) should be calculating from the total height
(31 x 0,6 = 18,6 meters).
Some say, it should be calculating from the upper bearing (23 m x 0,6 =
12.8 m)
Whats your opinion?
Jari, OH2BU
For OH3AC Club Station
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