[TowerTalk] Rohn 45 no guys
Mark Robinson
markrob at mindspring.com
Mon Aug 2 10:11:17 PDT 2010
Don't count on ice support. Several years ago some big 1000 ft towers in
Clayton NC were iced up. When the sun got on the towers and melted the ice
on one side, several of the towers collapsed.
Mark N1UK
----- Original Message -----
From: "Robert Chudek - K0RC" <k0rc at citlink.net>
To: <towertalk at contesting.com>
Sent: Monday, 02 August, 2010 12:17 PM
Subject: Re: [TowerTalk] Rohn 45 no guys
Take a look at the 20 foot self-supporting figures. This must be some kind
of "magic length" as Rohn 45 with no ice will support 22 ft^2 and with 1/2"
of ice it will support 25 ft^2. The ice must be acting like a bracing
component? The 20' row appears to be the only height where the number "don't
make sense".
73 de Bob - KØRC in MN
Message: 4
Date: Mon, 2 Aug 2010 10:51:34 -0400
From: "Lee J. Imber (WW2DX)" <lee at ww2dx.com>
Subject: Re: [TowerTalk] Rohn 45 no guys
To: garyschafer at comcast.net
Cc: TowerTalk at contesting.com
Message-ID: <7C6B18C8-E654-4EAE-BC48-819D32B494EE at ww2dx.com>
Content-Type: text/plain; charset=us-ascii
Here is a Rohn chart, hope this helps.
http://www.hudsonvalleytowers.com/Docs/Self_Supporting_Tower_Chart_Rohn.pdf
73 Lee
WW2DX
On Jul 28, 2010, at 11:11 PM, Gary Schafer wrote:
> How high can rohn 45 be used with no guys if it is to be used only to
> support one end or the center of a wire dipole, say for 80 meters?
>
> How about with only top guys?
>
> 73
> Gary K4FMX
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