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Re: [TowerTalk] Crane release from tower?

To: TOWERTALK@contesting.com
Subject: Re: [TowerTalk] Crane release from tower?
From: Cqtestk4xs@aol.com
Date: Mon, 30 Jul 2012 19:10:20 -0400 (EDT)
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Sometimes you get lucky and the hook will disengage on it  own.  Otherwise, 
someone (usually the owner) gets the enviable job of  having to climb the 
tower and unhook.  Usually the tower is picked up by a  strap and the hook is 
attached to it.
 
Before climbing 50  ft of unguyed 25, I would definitely guy  it with rope 
at the least, or with the guy wire.  You will probably have to  have a three 
hour minimum and the tower set should only take around 10-15  minutes,so 
you'll have plenty of time to set up the guys, if you attach the guys  to the 
tower when you lift it.
 
Bill K4XS/KH7XS
 
 
In a message dated 7/30/2012 9:53:51 P.M. Greenwich Standard Time,  
john@ae5x.com writes:

Please  pardon the dumb question...I'm on new turf:

In a couple weeks, a crane  will be coming to raise 30 feet of Rohn 25 
tower (in one piece) onto the  existing 20 feet already in the ground. How does 
the crane normally release  from the section to which it's attached? That 
point will now be 50 feet high  and I know taller towers are raised this way.

Is the tower attached to  the crane by the hook, which falls away once 
there is no longer a load on it  or is there some other way (short of climbing 
up there to  untie)?

Tnx/73,

John AE5X
The tower in  progress:
http://www.ae5x.com/blog/tower-installation/

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