Even at the 40 foot level, it says a Rohn 45 has to be guyed once.
(For a load of up to 11.3 sq feet)
However, here is what Rohn Says on their website:
10 Feet - 55 Sq Feet
20 Feet - 25 Sq Feet
30 Feet - 9 Sq Feet
35 Feet - 4.7 sq Feet
This is based on the 70 MPH Winds.
To find this chart, go to
Click on On Line Catalog (Bottom Left of the Menu Bar)
GT Series (Top Right)
25 G (Again, Top Right)
Then Allowable Antenna Areas
They have all their major 3 leg towers listed there with up to 90MPH Winds.
On Tue, Nov 4, 2008 at 12:26 PM, Roger (K8RI) <K8RI-on-TowerTalk@tm.net> wrote:
> Divinia Darin wrote:
>> What are the recommendations on Rohn 45 self supporting?
>> I am looking at approx 50' with a 2 element steppir and a Ham M.
>> Figure I am good?
> Not according to "The book". They used to have and may still do some
> where that 45G can stand 30' unguyed (I can't find it now), but the
> antenna load is small. On the last page of the 45G section it says
> "Guyed towers are not self supporting at any height".
> Yes I know it's done, but when doing so you're on your own. As it's
> against ROHN's own recommendations I doubt any insurance would be good
> be it liability of replacement.
> Roger (K8RI)
>> I can't find my old Rohn engineering guideline book. Is there one
>> Darin Divinia
>> TowerTalk mailing list
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