[TowerTalk] unguyed tower specs

[Blake M.]

Doesn't the "G" in the Rohn 25G, 45G, 55G etc. tower series stand for the 
word "guyed" (like it's how it's supposed to be installed)....?  If that's 
not what it stands for, well, it should.


73,
Blake N4GI


----- Original Message ----- 
From: "Jim Jarvis" <jimjarvis at verizon.net>
To: <towertalk at contesting.com>
Sent: Tuesday, January 24, 2006 5:49 PM
Subject: [TowerTalk] unguyed tower specs


>
> TT:
>
> I THINK I answered this, both personally and for posting, but haven't
> seen my msg.   Vide infra for context, and subsequent comments:
>
> On 1/23/06, Steve Shelton <Steve at bnjcomp.com> wrote:
>> Hi, I am fairly new to towers and I have tried to research information
>> on rohn's 25, 45 and 55 towers.  I have found quite a bit of information
>> on these towers but not the exact answers that I am looking.  One of my
>> questions is what is the maximum safe height on these three towers
>> without guying?
>
> IF I recall correctly, 25g is rated for 2 sq. ft. 30' above a house 
> bracket,
> or the foundation, if not bracketed.   45g has a higher rating, and 55g 
> yet
> higher.   I have had 45g with 10 sq. ft, 40' above a house bracket for 
> many
> years.  Solid.
>
> One would be insane to expect to freestand 25g at any useful height...or 
> to
> climb one which appeared to have been installed that way.   Remember, aged
> towers are weaker than when they went up.  Use a crane, if you're taking
> down
> anything like 50'+.   Your life is in the balance.
>
> That said, there are scads of 'commercial' installations with 70-80' of 
> 25g
> with one set of guys at the midpoint, and a vhf-gain vertical on top.
> They're
> simply not safe to climb.
>
> n2ea
> jimjarvis at ieee.org
> jimjarvis at verizon.net
>
>
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