[TowerTalk] [Bulk] 30 foot Rohn 25G calculations

[Joe Subich, W4TV]

 > Heck, I only want to go up 30 feet. One set of guys should do it,
 > right?

Yes, the Rohn 25 example for 130 MPH shows ~10 sq. ft. with one set
of guys at 35 feet.

73,

   ... Joe, W4TV


On 2015-02-12 1:49 PM, bcarling at cfl.rr.com wrote:
> This is why I wanted to go with a guyed Rohn 25G in the first place.
>
> Someone tried to talk me out of it since I have such a small yard.
>
> Heck, I only want to go up 30 feet. One set of guys should do it, right?
>
>
> On 12 Feb 2015 at 9:14, Grant Saviers wrote:
>
>> 139 mph with no guys????  No way.   Rohn catalog rates 30' of R25
>> unguyed at 90mph 1.7 sq ft.  55g maybe a small tribander.  You need a PE.
>>
>> Grant KZ1W
>>
>>
>> On 2/12/2015 6:58 AM, bcarling at cfl.rr.com wrote:
>>> (I'm not sure if my earler message came  through, not seeing it....)
>>>
>>> I am putting together a permit application with my city which requires certfication for 139 mph
>>> for three second gusts as in TI-222 spec. Also steady 100 or 110 mph I think. I will review
>>> that.
>>>
>>> We are making a 30 foot Rohn 25G tower according to the Rohn specification with  4 foot
>>> cube base of concrete with no guys. I'm just qualifying the tower for the permit.
>>> I already have good drawings and aof course borrowed the Rohn PDF blurb that says it is
>>> compliant with TI-222.
>>>
>>> Does anyone know of a set of calculations for this fairly standard tower? We would love to
>>> find someone who would share their calculations or point us to someone who would
>>> do them reasonably?
>>>
>>> I know someone mentioned some possibilities earlier, via ARRL or whatever...
>>>
>>> Any pointers will be appreciated.
>>>
>>> Bry, AF4K
>>> _______________________________________________
>>>
>>>
>>>
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>>
>
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