[TowerTalk] 30 foot Rohn 25G calculations

[Chris]

We'd better get it straight from the horses mouth.  The Rohn info for using G series towers self supporting is founder here:

G-Series Self-Supporting Brochure Download


139 mph?  Your house won't be standing at that wind speed, so who cares about 30' of tower?  (I'll answer that:  Apparently, the building inspectors).

Chris
KF7P




On Feb 12, 2015, at 9:51 AM, Roger (K8RI) on TT wrote:

> On 2/12/2015 9:58 AM, bcarling at cfl.rr.com wrote:
> 
> You do know that 30' of 25G unguyed will support only a very small antenna and is dangerous to climb without temporary guys of sufficient strength?
> 
> 73
> 
> Roger (K8RI)
> 
>> (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.
>