[TowerTalk] Crank Up Tower Info

[David Jordan]

Yes, Crank-up towers are no different than any other towers or antennas... 
they require regular maintenance.  The bad idea is 'not' the tower design 
its the idea that towers don't require maintenance.  The tower I use is 
almost 40yrs old... NO RUST, NO BROKEN CABLES, NO FAILURES because the tower 
is maintained annually and checked monthly.

73,
Dave
wa3gin
----- Original Message ----- 
From: "Mike" <noddy1211 at comcast.net>
To: "'Steve Jones'" <n6sj at earthlink.net>; "'Gary and Arlene Johnson'" 
<qltfnish at omniglobal.net>; <towertalk at contesting.com>
Sent: Thursday, March 07, 2013 6:43 PM
Subject: Re: [TowerTalk] Crank Up Tower Info


>I have seen guyed crank up towers, I think they were Tri-ex. They looked to
> have a flip lock attached to the guys so that the sections would lock in
> place when the guys were pulled out.  The one I saw recently that needed 
> to
> be removed was locked forever with rust and would have been a bear to take
> down without a crane. A good idea except when the locks rust in place.
>
> Mike/K6BR
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of 
> Steve
> Jones
> Sent: Thursday, March 07, 2013 12:00 PM
> To: 'Gary and Arlene Johnson'; towertalk at contesting.com
> Subject: Re: [TowerTalk] Crank Up Tower Info
>
> You should not guy a crank-up tower.  The guys turn lateral wind pressure
> into a vertical compression force pushing straight down on the raising
> cable.  On a regular guyed tower, ie. Rohn 45, the whole tower structure 
> is
> designed to resist that downward force.  On a crank-up, only the raising
> cable is resisting that force.  There is certainly some design margin in 
> the
> raising cable strength that would let you get away with guys up to a point
> if you want to take the risk.
>
> 73,
>
> Steve
> N6SJ
>
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of 
> Gary
> and Arlene Johnson
> Sent: Thursday, March 07, 2013 11:39 AM
> To: towertalk at contesting.com
> Subject: [TowerTalk] Crank Up Tower Info
>
> I have an unknown brand of crank up tower that I need to put up. The tower
> can go up as high as approx 72 feet if all 4 sections are used.  I plan to
> only use the bottom 3 sections as did the guy I got it from.  The guy I 
> got
> it from had it guyed at the 20 foot and 38 foot levels (at the top of the
> bottom and middle 20 foot sections).  For a tower of this height how far
> from the base do I install my ground anchors??  Would I put them at an
> average of the distance between the two sets of guy lines (approx 29-30
> feet) or at the distance of the upper guy line (38 feet).  When he had the
> tower fully retracted he just let the upper guy lines go slack.  The
> alternative to this question is should I put in a set of ground anchors 
> for
> each set of guys??
>
> Gary J
> N5BAA
> Hill Country Amateur Radio Club Secretary 2013 Kerrville, TX
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