[TowerTalk] Tower Guy Calculations

[jimlux]

On 10/15/19 11:13 AM, n6sj at 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