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Re: [TowerTalk] Rohn 25G Hardware

To: <towertalk@contesting.com>
Subject: Re: [TowerTalk] Rohn 25G Hardware
From: "Mark Beckwith" <mark@concertart.com>
Date: Mon, 20 Oct 2003 07:56:06 -0500
List-post: <mailto:towertalk@contesting.com>
>FWIW, I demonstrated the hard way that the factory supplied Rohn 25G class
5
>hardware is very adequate, and stronger than the tower legs.  I lost a guy
> wire on a 25G tower and had it fall over.

And I used the same experiment to demonstrate that SS bolts shear.  I still
have the bolts.

The failure point, BTW, was a drop forged eyebolt bolted into a concrete
parapet horizontally, with the guy pulling upward on it (i.e. laterally)
(max angle on the Rohn drawings).  When the tower went down, a few of the SS
bolts sheared.  Note that it was not the SS bolts in the tower joints
shearing that made the tower fall.

Mark, N5OT


_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

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