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@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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