[TowerTalk] Rohn 45 Tower Bolts Torque Setting

[hanslg at aol.com]

 Steve, Mark,

It is not that important how much torque or stretch you have in the bolt. Torquing has been used for generations and has been accurate enough disregarding variations in the friction.

I believe that the important thing is that the screws not unscrew themselves after a couple of years. You are not depending on the friction between the items bolted together in this case, right? Isn't it the sheer strength of the bolt that is the key here?

Hans - N2JFS

 


 

 

-----Original Message-----
From: Steven Kerns <n3fti at yahoo.com>
To: towertalk at contesting.com
Sent: Thu, Apr 29, 2010 4:39 pm
Subject: Re: [TowerTalk] Rohn 45 Tower Bolts Torque Setting


Mark,

Using torque measurement is not accurate because of friction related to 
different surface tensions of the fasteners and the difference in lubricants.

To get an an accurate measurement you should read the bolt stretch with a dial 
indicator using a bolt stretch gauge.  One can be purchased here:  
http://www.summitracing.com/parts/ARP-100-9942/  ;-)

Steve, N3FTI



--- On Thu, 4/29/10, Mark Robinson <markrob at mindspring.com> wrote:

> From: Mark Robinson <markrob at mindspring.com>
> Subject: [TowerTalk] Rohn 45 Tower Bolts Torque Setting
> To: towertalk at contesting.com
> Date: Thursday, April 29, 2010, 10:59 AM
> I started to bolt some of my Rohn 45
> together. Is there a torque setting for 
> the tower leg bolts anywhere. How tight should they be?
> 
> 
> 
> 73 Mark N1UK
> 
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