[TowerTalk] Rohn 45G Self Supporting

[Dave Tipton]

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
http://www.radiancorp.com/ROHNNET/rohnnet2004/html2004/index.html
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.

Dave, W5DMT

On Tue, Nov 4, 2008 at 12:26 PM, Roger (K8RI) <K8RI-on-TowerTalk at 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
>> online?
>>
>> Thanks,
>> D.
>>
>> ----------------------------------
>> Darin Divinia
>> wg5j at me.com
>>
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