I have watched this thread the last week or so and have seen lots of comments.
I was reminded of something a friend of mine did some years ago when he was
dropping a 22ft mast into his tower which I am pretty sure was 55G. He
bracketed one section of 25g near the top of the 55g and used a shorter gin
pole made of another 'product' for the lack of a better term. It was not
aluminum most likely some kind of steel TUBING not PIPE and there is a
difference. He used the top pulley and clamps my IIX Industries gin pole kit.
It was tedious but worked out great. - Mike
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Artek
Manuals
Sent: Wednesday, January 26, 2022 1:22 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Mast install help
to further underscore Steves comment. the Rohn GP is rated for a
"Vertical Lift" force. It is NOT rated for any sideways or bending
moment force. Depending on the wind load even with a modest sideways
moment with a very heavy mast the pole will fail !! I have the scar on
my right hand to remind me of that as I noted in my earlier post. If
the tower is already erected ..GET A CRANE ...much safer..yeah it is
expensive but the loss of even a finger is far more valuable than the
cost of a few hours of crane time
Dave
NR1DX
On 1/26/2022 11:17 AM, Steve Maki wrote:
> I hope everyone re-reads John's point here and takes it to heart - the
> standard Rohn gin pole is rated for R25 & R45 sections - it's not even
> rated for R55! The job being discussed calls for a stronger (and
> ideally a longer) pole.
>
> -Steve K8LX
>
> On 1/24/2022 10:02 PM, john@kk9a.com wrote:
>> It is easier and safer with a bigger gin pole. If you're using a Rohn gin
>> pole a 2" x 22 ft mast is substantially heaver that it is designed to
>> lift.
>> Remember that the minimum force on the pole is double the weight of the
>> object being lifted.
>>
>> John KK9A
>>
>>
>>
>> Greg N5IF wrote:
>>
>> I've a 22ft chromoly mast and am wondering if I will get this
>> installed at
>> the moment (without a crane).
>>
>> Right now, I have 40ft of R55, and I thought I would raise the mast and
>> drop it into the yet to be completed tower (easier to do in my mind) vs
>> trying to stab it into the bearing when the tower is completed.
>>
>> How have others dealt with a 22ft mast, when you have a 12ft gin
>> pole.......what am I missing to get this done?
>>
>> Greg
>> N5IF
>>
>> _______________________________________________
>>
>>
>>
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