[TowerTalk] Rohn 25g unguyed height

[W4LDE-Ron]

Terry,

I installed a 25G, 4 sections on the concrete base using both a house 
bracket and guys back in 1988 and took it down 2008.  A house bracket 
was bolted through the eve wood siding at 15ft to a new inside attic 2x6 
spanning several 2x4. the 2x6 was anchored to the 2x4 and via several 
wire ropes to the main house trust in the attic.  I also guyed the top 
section for stability.  On top was a TA33 plus a Ham-IV rotor.  The 
combination went through 6 hurricanes, 3 in one month, while living in 
Central FL, a hurricane on one occasion turned the antenna on the mast 
and made more noise than the wind, XYL was scared the tower would fall 
on the house.  I wouldn't rely on just the bracket but add some guys.  
When I left Fl back in 2008 I gave the tower, antenna and rotor to the 
local club who supplied a climber who took down the guys and up he went 
much to my stated concern plus a signed waiver.  All came down as expect 
without a hitch.

Best advice is:  Don't exceed the tower design spec's, use brackets 
along with guys, don't cheat on the size of the cement hole and add 
lighting ground connects at the base.

I now have a *Heavy duty* Aluma 50' crank up tilt over un-guyed which 
has worked great for 8 years with a Tail twister and 3 el SteppIR w/ the 
30/40 meter add on, more costly but you may want to look at the tower.

73 de Ron W4LDE


On 10/24/2017 7:42 AM, Clay Autery wrote:
> Apologize for yet another post...  After reading that document again, 
> it would appear that Rohn bracketed towers REQUIRE TWO brackets. Their 
> specs make no provision for only ONE Rohn bracket.
>
> I suspect they've been asked the "What about ONE bracket?" question 
> before.  Phone call is free...
>
> 73,
> Clay Autery
> KY5G
>
>
> On 10/23/2017 11:20 PM, Terry Brown wrote:
>> I am trying to determine how high I can use a Rohn is 25g unguyed.
>>
>> Here is my situation:
>>
>> I want to sink a 10 ft section of Rohn 25g into 3 ft of concrete  
>> base. This will leave 7 ft. Above the base. I will then attach 
>> another 10 ft. Section and attach a house bracket at the 14 ft level. 
>> This will leave the second section unguyed for 3 ft above the house 
>> bracket.  How many more 10 ft. sections can I add safely above that 
>> point?  My antenna will be a Mosely TA33-Jr (27 lbs) wind surface 
>> area 5.1 sq. Ft. Windload 98 lbs at 80 mph.
>>
>> Rotor is Alliance HD-73.
>>
>> Thanks!
>>
>> Terry
>>
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