[TowerTalk] Screw Anchors

[W9SN]

David Jordan wrote:
> 
> Hi Folks,
> 
> I'm getting started on a country antenna site and I've got some
> questions to answer and would appreciate any inputs...
> 
> Got some figures from the Soil evaluation service for the perk test on
> the property where I'm planning to install a CT-100 (100'guyed) crank up
> tower and wondered if it would be useful in making the determination as
> to whether I should go with earth screw anchors or concrete.  The terms
> used don't mean anything to me but for what they're worth the five test
> holes all read out about the same.
> 
> Texture group: I-II
> 
> Depth    Color    Texture
> 0-10"     BR        (10 5/3) LS
> 10-36    LyBR    (10 6/4-6/6)LS
> 36-48    BrY       (10 6/8) LS
> 48-60    BrY       (10 6/8) LS (coarse) w/strbr (7.5 5/6) Lamella
> 
> TRI-EX has both 6'  and 8' anchors. Sets of three go for $96 and $120.
> Is there a better price to be had?
> 
> I'm planning to install a TB6EM, HB 40meter beam (2-3 elements), 12
> element
> 2 meter beam and a turnstile for 160/75 meters. Looking for comments on
> how best to stack the beams. I've considered placing the 40m beam just
> above the tower while placing the TB6 about 12' above the 40M with the
> 2m beam in between.
> 
> The tower guy points are at 20', 51' and 98'. I plan to replace the 1/4"
> steel cable at the 98' guy point with phillistran and set the 160
> turnstile at one section down from the top
> which would place it abou 15' below the 40m beam and 30' above the
> second set of steel
> guys hoping to minimize the interaction between the 160 antenna, the
> second guys, and the
> 40m beam.
> 
> Regarding grounding. All the sections of this tower contact each other
> via alloy rollers, the pull cable, and it's pulleys...unlike a bolt
> together tower. Any thoughts as to the need
> to improve these connections (should I run a ground cable from the top
> section down to the base and ground grid?
> 
> I'm putting up a steel building for storage of farm supplies, to park
> the RV and tractor. The building will be about 25'X40'X16'. I was
> thinking that I might set the tower just behind the rear or off to the
> side of the building. Any thoughts about pros and cons of having the
> building next to the tower versus off to one side by 50-80'  would be
> appreciated.
> 
> Thanks in advance,
> dave
> WA3GIN
> 


I had the local power company come out here on a Saturday and install 3
anchors (16' long each) with their power truck.  Took one hour to do
them
all and they charged me $500.....worth every penny.
these are the same anchors used in cross country high power utility
towers,
very strong, big, and very very heavy....glad they had strong guys...
                      ------------------------------------------
                                Steve Narducci                 
                        Amateur Radio Station -  W9SN
                          All Ten Tec Equiptment         
                          Toys for "Real" CW Men     
                      ------------------------------------------

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