[TowerTalk] rohn 25 section bolts

[Keith Dutson]

 Good question.  I always wondered why.  Would guess the designer wanted to save cost on the upper bolt, which us likely for safety factor rather than strength.
73, Keith NM5G
    On Monday, April 4, 2022, 07:39:10 PM CDT, Steve Maki <lists at oakcom.org> wrote:  
 
 I had two gin poles, one made from R25 & one made from R55. I drilled 
out the R25 holes to be all 3/8", and the R55 holes to be all 1/2". 
There was no way we were going to have to deal with more wrenches than 
necessary on repetitive everyday tasks. That's just dumb.

However my Rohn ham towers and all the others I installed were all 
unmodified when we installed them. For permanent towers it's probably 
better to leave the hole galvanizing somewhat intact.

It may have been that the original design had the larger bolt being 
adequate by itself, and the smaller hole could be used for an alignment 
tool, with the last bolt then as a safety.

-Steve K8LX


On 4/4/2022 8:11 PM, WW3S wrote:
> Guys, I know they use two different size bolts……but dont know why…..do different sizes change the engineering….or was there a bolt shortage and they could only get smaller ones?
> 
> Sent from my iPad
> 
>> On Apr 4, 2022, at 8:09 PM, Wayne Kline <w3ea at hotmail.com> wrote:
>>
>> 
>> Jamie,
>>  
>> A:  Rohn never made R-25 with the same size bolt.  All  Rohn stacked tubular tower  R-35 ( rare  Motorola  type ) R-45  -R-55 use two diferent size bolts .
>>  
>> Why ??????????
>>  
>> Wayne W3EA
>>  
>>  
>>  
>>  
>> Sent from Mail for Windows
>>  
>> From: Jamie WW3S
>> Sent: Monday, April 4, 2022 7:07 PM
>> To: TowerTalk
>> Subject: [TowerTalk] rohn 25 section bolts
>>  
>> Thanks everyone for the help with the tower bolts......now, a question
>> on why 2 different sizes on bolts for the sections? I think I heard an
>> answer a long time ago, but cant remember why,......also, did Rohn ever
>> make 25 with the same size bolts, or if we have tower with the same
>> size, is it a knockoff?
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