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Re: [TowerTalk] Real numbers for Rohn BX-64 Re: guying

Subject: Re: [TowerTalk] Real numbers for Rohn BX-64 Re: guying
From: David Jordan <wa3gin@erols.com>
Date: Wed, 13 Apr 2005 12:34:04 -0400
List-post: <mailto:towertalk@contesting.com>
...one method to increase longevity of the HDBX48 tower is to mount the 
rotor on the tower base section using angle steel and a rotor mounting 
plate or direct ly on the concrete pad and run a 2" pipe up the center 
of the tower.  This isntallation method makes for easy maintenance on 
the rotor (no climbing) and removes most if not all the twist moment 
forces from the latice tower which is typically the primary reason for 
failures of the tower (the revets get loose from all the twisting and 
eventually can pop out) next to over loading the tower. 

Heavy Duty doesn't mean put as much as you can afford on the top!  I've 
had several of these towers installed over the past 40 years.  Current 
tower has been up over 25yrs w/ 3 ele tribander, 11 element 2m, 2m Ringo 
Ranger for local and state side VHF/HF. Revets are still tight.

As with any tower, monthly physical inspections are just common sense.  
These things aren't trees, you can't plant them and the forget about them.

Good Luck,
dave
wa3gin

Chuck Sudds wrote:

>At 09:34 PM 4/12/05 -0400, David  Thompson wrote:
>
>Yes Dave, *I* was one of those idiots who attempted using an HDBX48 tower 
>to hold up a KT34XA and a 14 element 2 meter beam atop that!! 
>Unfortunately, I can no longer find any of the photos of that disaster of 7 
>years ago, it is still etched firmly in my memory!  DON'T DO IT!  I was 
>lucky..... nobody was killed or injured!  And yes, I even had mine 
>guyed!!  I sure do sleep better with my 100ft Rohn 45G properly guyed these 
>days though.  Do what the manufacturer says!!
>
>Chuck  KØTVD
>
>  
>
>>I hope that everyone knows the BX series is only designed to hold a beam
>>with a boom of NO longer than 10 feet.  Guyed or unguyed.
>>
>>There have been horror stories of those who tried longer beams such as the
>>TH7 or KT34XA or even quads bigger than  3 elements.  Longer booms stress
>>the bolts holding the top section so that the metal splits.
>>I think some of this is recalled in the towertalk archives.
>>Dave K4JRB
>>    
>>
>
>
>_______________________________________________
>
>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.
>
>_______________________________________________
>TowerTalk mailing list
>TowerTalk@contesting.com
>http://lists.contesting.com/mailman/listinfo/towertalk
>
>  
>
_______________________________________________

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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