[TowerTalk] Rohn 25G

[Grant Saviers]

Check out the finite element analysis that Kurt K7NV has on his web site 
re pier pin and solid guyed towers.  it is quite instructive about the 
advantage of pier pins - they can handle higher loads than the "legs in 
concrete" for guyed structures.  Also, if using Phillystran for some 
guys, there are some very important conclusions.

http://k7nv.com/notebook/towerstudy/towerstudy1.html

Grant KZ1W

On 8/18/2013 4:09 PM, Rex Turvin wrote:
> I am using a pier pin base because that is what my county requires. When looking at Rohn's manuals and drawings a tower section buried in the concrete is used for a self supporting tower max height 40'. Rohns manual for guyed towers only shows a pier pin base, therefore the county will not allow me to use the tower section in the base. I argued that the foindation was stronger but a no go. I must use what the county will sign off on.
> 73 NR6M
>
>   
> ex: KF7NMD
>
>
> Sincerely,
>
>
> Rex Turvin
> www.nr6m.com
>
>
>
> ________________________________
>   From: Ray Benny <rayn6vr at cableone.net>
> To: Mark Robinson <markrob at mindspring.com>
> Cc: turvin2009 at yahoo.com
> Sent: Sunday, August 18, 2013 1:54 PM
> Subject: Re: [TowerTalk] Rohn 25G
>   
>
>
> Rex,
>
> I am wondering why you are using the pier base? I believe that unless you are going really high it not necessary. In most installations that I have heard or know of, the guys just bury a 4 - 5 ft piece of Rohn 26G in concrete and build from there.
>
> Ray,
> N6VR
>
>
> On Sun, Aug 18, 2013 at 1:48 PM, Mark Robinson <markrob at mindspring.com> wrote:
>
> I thought Rohn 25 should be guyed every 20 feet. If you are not using a wall bracket then I would install 3 sets of guys.
>> Mark N1UK
>>
>> ----- Original Message ----- From: <K7LXC at aol.com>
>> To: <towertalk at contesting.com>; <turvin2009 at yahoo.com>
>> Sent: Sunday, 18 August, 2013 1:58 PM
>> Subject: Re: [TowerTalk] Rohn 25G
>>
>>
>>
>>
>>   I am a newbie. I am putting up a 60' Rohn 25G with 2 sets  of guys.
>>>   My question concerns the baseplate. The baseplate only  uses a pier pin
> to hold it in place. It seems to me that this would allow the  base plate to
>>> move.
>>>
>>>     Where would it move to?
>>>
>>>     Pier pins are typically used with bigger, heavier  towers because it
>>> more or less equalizes the leg stresses. In your case I'd  suggest just
>>> burying some of the bottom section in concrete. It's much easier to  erect with
>>> the bottom section locked in. With a pier pin, you'll have to use temporary
>>> guying to get it erected.
>>>
>>>     If your base is already poured, I'd recommend  bolting the baseplate to
>>> the base. (Use a rotary hammer and epoxy to set the  bolts.)
>>>
>>>      For a newbie, I don't recommend messing with  temporary guys. You need
>>> solid rigging skills and the right equipment to do that  safely. And people
>>> still get hurt by using them. Set it in concrete.
>>>
>>>
>>>
>>>   The 1st set of guys wires go at 28'
> What is the safest method  for installing the 10' sections prior to having
>>> the 1st set of guys in place? I  am not using a crane. I am using a gin
>>> pole. I want to make sure that it does  not fall over while I am the process of
>>> getting to the height of where the 1st  guys go.
>>>
>>>     See comments above. If you're going to proceed with  temporary guys,
>>> use some of your precut guys for temps since ropes are stretchy.  A comealong,
>>> guy grip, nylon slings and some carabiners or shackles will be very
>>> useful. ALL of this is covered in my UP THE TOWER book which I strongly suggest
>>> you read. (Available from _www.championradio.com_
>>> (http://www.championradio.com) )
>>>
>>> Cheers,
>>> Steve      K7LXC
>>> TOWER TECH
>>> and
>>> Champion Radio Products
>>> Cell: 206-890-4188
>>> _______________________________________________
>>>
>>>
>>>
>>> _______________________________________________
>>> TowerTalk mailing list
>>> TowerTalk at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/towertalk
>>>
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