[TowerTalk] Rohn 25g unguyed height

[N1BUG]

I am far from an expert but every bracketed Rohn 25G tower I have 
climbed (several) wobbled in the joints above the top bracket. The 
one that I took down showed major elongation of holes in the joint 
that was above the top bracket.

I once installed a guyed 25G tower with guys near the top of the 
next to last section. It only had a large VHF vertical on top but 
was in a very windy location. After two years the bolt holes at the 
one joint above the guys were worn so much I had to replace the top 
two sections.

I know Rohn gave the OK to bracketed installations for many years 
(maybe still does) but personally I will never again put even one 
section joint above the uppermost bracket or guys.

Paul


On 10/24/2017 07:42 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


-- 
Paul
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