[TowerTalk] How to fix crooked Rohn 45G short base?

[Blake Sobiloff]

Hi guys,

Due to the property lines and terrain I don’t have room to pour another one next to the existing one, so jackhammering out the current one may be the only option.

Some others have suggested drilling new bolt holes to make the first section plumb. That seems like the easiest option, but I worry that (depending on how close the new holes are to the existing holes) that will weaken the tower right where the majority of the bending stress is focused. I admit I’m naive about these things, though.

-- 
Blake Sobiloff
Reno, NV (USA)

> On Jul 4, 2020, at 5:45 AM, Nathan Lee <nathaniel.alee65 at gmail.com> wrote:
> 
> Pour another one next to the first one and try again.
> 
> 73
> 
> Nate
> 
>> On Jul 4, 2020, at 7:22 AM, Chuck Dietz <w5prchuck at gmail.com> wrote:
>> 
>> I would jackhammer it out and next time bolt the first section on when you
>> pour and keep checking the plumb as it dries.
>> Chuck W5PR
>> 
>>> On Fri, Jul 3, 2020 at 6:25 PM Blake Sobiloff via TowerTalk <
>>> towertalk at contesting.com> wrote:
>>> 
>>> Hi hi,
>>> 
>>> I’m putting up my first tower, a 40’ free-standing Rohn 45G (45SR040). I
>>> had my landscapers' help in getting the short base buried and cemented in,
>>> and unfortunately we’ve ended up crooked. I bolted the first section on top
>>> of the base and we’re about an inch out from top to bottom of the first
>>> segment.
>>> 
>>> What are my options for fixing this? I’m aware that Rohn doesn’t like
>>> drilling the bolt holes, even to get out the excess galvanizing, so I don’t
>>> imagine hogging out some holes would be the right way. In the archives I
>>> saw passing mention of bending the tops of a short base, but I wasn’t sure
>>> of the context so I don’t know if that’s the right approach.
>>> 
>>> I’m hoping we don’t have to jackhammer the base out and re-pour, so I’d be
>>> grateful for any other recommendations. Thanks!
>>> 
>>> --
>>> Blake Sobiloff (N6BNS)
>>> Reno, NV (USA)
>>> 
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