[TowerTalk] Question re: mating Rohn sections

[Jim White, K4OJ]

I tend to agree with this answer - note I am not a PE - and I am 
prepared for flames by PE and PE wannabes...

Seems to me like if you were to go with the overshot option and 
redrilling of the holes that you essentially would be saying that:

IT IS ONLY DOWNWARD FORCE THAT MATTERS...

-NOT-

Think about this - a sever force from a direction directly opposite one 
of the legs "attacks",  The tendency would be for the two legs closer to 
the force to act like a hinge location and the far leg would wanna raise 
up and separate.

If you had made that hole a little lower on the inner pipe, when the 
force reached that leg and it wanted to LIFT UP what would be holding it 
back... not much - you drilled those holes just below the original 
manufactured ones, right - so just a little piece of metal is left to 
keep that force in check?????????

If it were me I would use the original manufacturers original holes....

But then again, I do not have any alphabet soup after my name other than 
  my call!

73,

Jim, K4OJ




Jim Rhodes wrote:

> Doing the former will weaken the tower and may cause the tower to be 
> "bent" slightly at that joint. I would definitely go with the later 
> approach. And why shouldn't the bolts be supporting the weight of the 
> tower?
> 
> 
> At 11:42 AM 10/14/03, you wrote:
> 
>> So I've learned how to use a jack to fix bends in used tower sections 
>> to get them to mate.  I've learned to use Penetrox (or choose your 
>> brand) in the joints.  But here's an interesting problem:  My Rohn 45 
>> sections now mate so well that the upper pieces slide on slightly 
>> beyond the holes in the lower sections, in some places by over 0.5 
>> cm.  Do I drill out the holes, or raise the upper section a few mm and 
>> bolt them as pre-drilled?  Rule-following tells me to do the latter, 
>> but common sense tells me to do the former, since the bolts would 
>> otherwise have to bear the full weight of the tower!
>>
>> Thanks in advance for any help!
>>
>> 73,
>> Maury W3EF
>>
>> _______________________________________________
>>
>> 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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> 
> 
> Jim Rhodes K0XU
> jim at rhodesend.net
> _______________________________________________
> 
> 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 at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>