On 10/15/19 11:13 AM, n6sj@earthlink.net wrote:
Tom,
Self-supporting crank-up towers should never be guyed. When the wind blows,
the lateral force is translated downward through the guy wires. This adds a
new load to the supporting cable that it was never designed for. Typically
the cable will break first, although sometimes one of the tower legs will
buckle first, as it is being stressed by the additional downward force
beyond its design as well. The weak anchors for the guy wires are totally
beside the point.
Never guy a self-supporting crank-up!
73,
Steve
You can guy the bottom section of a crankup without causing load issues
on the hoist cable - this might be a useful expedient for a tower
trailer type situation.
There are crankups that have funky locking mechanisms too, which might
be guyable at higher points (these are the 100 ft plus big trailer mount
units)- but they've clearly been designed for this
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