[TowerTalk] self-supporting rohn 25g??

Bill Coleman aa4lr at arrl.net
Tue May 9 23:11:49 EDT 2006

On May 9, 2006, at 8:14 AM, Cqtestk4xs at aol.com wrote:

> Without knowing the windload, it is hard to make a guess.  The  
> regular  base
> for Rohn 25 guyed tower is 2' 8" by 2' 8" by 3' deep.

uh, 2' by 2' by 4' deep. About .7 yard of concrete.

> Rohn 25 is not designed to be self-supporting, but my guess is 2.5  
> yards of
> concrete would do it.

Rohn 25 is self-supporting up to a very short height, depending on  
the wind load. I don't have my catalog handy, but at 70 mph, it's  
about 30-35 feet, at which point it can only hold itself up (no  
margin for antennas).

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Quote: "Not within a thousand years will man ever fly!"
             -- Wilbur Wright, 1901

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