[TowerTalk] guying distance

[Grant Saviers]

I also think it is impossible for a guyed tower to "pull apart".. The 
harder the wind blows the more downforce is created by the guys.  A 
tower can fail in compression load as well as bending so the PE analysis 
considers both in the design.

Grant KZ1W

On 12/5/2018 10:09 AM, john at kk9a.com wrote:
> I am not a PE but to me pulling the tower apart seems very unlikely. If
> you use a six way star bracket or Rohn 25-55 guy bracket the outward force
> is all on the bracket. Standard Rohn 65G brackets are mounted on each leg
> but the tower is quite strong and there is less guy tension with the
> shallower angle.
> 
> FWIW, whenever possible I also use more guy distance than 80% to allow for
> beams to rotate. Also heavier tower allows for less guys which leaves more
> room for antennas. Sometimes options are limited, my Aruba house had a
> small lot and the guys were close to 50% spacing.
> 
> John KK9A
> 
> 
> K4XS Wrote:
> 
> I too, have gone greater than 80% to allow the antennas on the rotating
> tower to clear the guy wires.  Currently the top guys on my tower are at
> 84 feet and are pulled out to around 100 feet. Realize though, that the
> tower is now pulling more sideways and less downward than before when it
> was at 84 feet.  I believe that taken to extremes this would eventually
> allow the tower to pull apart in heavy wind, especially if it was Rohn 25.
>   I have done the height equals guying distance on 200 footers and have had
> no issues.  However, they were never tested in a hurricane, so who knows?
> Bill KH7XS/K4XS
> 
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>