[TowerTalk] new tower

[jeremy-ca]

The tower will still move but it is not twisting as in winding up to a point 
of possible fracture. The commercial site over on the next hill had 140' of 
45G with the base buried in concrete and a bunch of sticks on it. After 
about 15 years the bottom section fractured. The tower didnt collapse but 
they replaced it with 55G on the same pad but drilled it for a pin.

We are both in a very exposed location with negative horizons and once above 
the tree line the wind is almost always fairly strong even when it is dead 
calm on the ground.

Carl
KM1H


----- Original Message ----- 
From: <john at kk9a.com>
To: <TOWERTALK at contesting.com>
Cc: <km1h at jeremy.mv.com>
Sent: Friday, July 13, 2007 10:57 PM
Subject: Re: [TowerTalk] new tower


>I agree that the pier pin lets the guys do the work and it is the best base
> for large tower.  I don't think the pier pin base will do anything to
> minimize tower twisting.  The best way to stop the twisting is to use a 
> star
> guy bracket.
>
> John KK9A
>
>
>
> To: "Mark Robinson" <markrob at mindspring.com>,"Paul Hemby"
> <phemby at hotmail.com>, <towertalk at contesting.com>
> Subject: Re: [TowerTalk] new tower
> From: "jeremy-ca" <km1h at jeremy.mv.com>
> Date: Fri, 13 Jul 2007 21:34:21 -0400
> List-post: <mailto:towertalk at contesting.com>
>
> It minimizes the tower twisting forces especially at the base. Recommended
> by Rohn. Especially advantageous with a tall tower with a big load; lets 
> the
> guys do the work. Ive been on the top of my tower with a strong wind 
> blowing
> and with the 1/4" EHS it barely moves.
>
> Carl
> KM1H
>
>