[TowerTalk] Rohn 25 - how many beams?

[Michael Pfeuffer]

Hi Brad,

Take a look at the Rohn engineering docs on their web site.  The "guy 
details" pages list the maximum windload for each configuration.  At the 
top of each diagram is two numbers one in an oval the other is in a 
rectangle.  The oval indicates the rated windload for round members, while 
the rectangle is for flat members.  For example, a 120' of 25G in a 90MPH 
area is rated at 14.4 sqft.

GL,
--Mike WQ5C


At 01:21 PM 6/14/2004, Brad Hedges wrote:
>I'm planning on upping my Rohn 25G to about 115 ft this summer (from 45 ft),
>and I'd like to stack as many beams as I can, up to five, if possible (HF).
>
>I intend to guy every 30 ft, +/-, and only the top two - either a KT-34A or
>a TH7-DXX, and a HyGaine 2L 40M - would rotate. The plan being to fix
>additional tri-banders on JA at ~90 ft, on EU at ~70, and on SA at ~50 ft.
>Phase fed through a pair of WX0B Stackmatches.
>
>Is this possible? or should I just accept as fact that it is too much load,
>and find a heavier tower (I've got my eye on !00 ft each of Rohn 45G and
>AB-105)?
>
>I live in central N.Carolina - I'm Army, stationed at Ft. Bragg - and the
>soil is mostly sand over clay. Wind rating is 80 MPH. Where can I find guy
>anchor recommendations? Anybody able to help me here?
>
>Thanks,
>
>Brad
>K0BHC
>
>_______________________________________________
>
>See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless 
>Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with 
>any questions and ask for Sherman, W2FLA.
>
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