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Re: [TowerTalk] Guyed vs Self Supporting Lattice towers

To: towertalk@contesting.com, bclausen@co.volusia.fl.us
Subject: Re: [TowerTalk] Guyed vs Self Supporting Lattice towers
From: K7LXC@aol.com
Date: Tue, 19 Aug 2008 15:58:12 EDT
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
 
In a message dated 8/15/2008 3:48:36 P.M. Pacific Daylight Time,  
towertalk-request@contesting.com writes:

>  Does anyone know a good source (s) (articles, websites) on  the pros and 
cons of guyed towers vs self supporting lattice  towers?
 
    Umm, don't know of anything like that myself.  

Basically the cost of a tower is the cost of the  steel. A self-supporting 
tower needs lots more steel in it than a guyed tower  that uses cheap, 
lightweight guywire for support. Therefore, a self-supporting  tower is 
generally going 
to be more expensive than a self-supporter. For  example, a 96-foot 
self-supporting Trylon weighs about 1200 pounds. 100' of  Rohn 25G weighs about 
400 
pounds. 
 
    As far as excavation and concrete, the  self-supporter is going to be 
more expensive. A typical self-supporter needs  6-7 yards of concrete in the 
base. A guyed tower (e.g. Rohn) only needs about  4 yards for the base and 3 
anchors. 
 
    Either tower can be installed with a ginpole but  a self-supporter is 
easier and faster using a crane. 
 
    Guyed towers are much easier when it comes to a  populated tower; e.g. 
stacks of yagis, sidemounts, etc. It's tough to have a  rotatable sidemount on 
a 
free-standing tower. 
 
    A guyed tower has a much larger footprint since  the guys have to be out 
80% or so of the tower heighth. A self-supporter  base is something like 
6'x6'. 
 
    I guess it depends on what you want the tower to  do and what your 
constraints are. Your most bang-for-the-buck is a guyed  tower. 
 
Cheers,
Steve    K7LXC
TOWER TECH -
Professional tower services for hams



 



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