[TowerTalk] 25G vs 45G

[James Sawyer]

Go with 45G.

Jim

-----Original Message-----
From: owner-towertalk@contesting.com
[mailto:owner-towertalk@contesting.com]On Behalf Of J.P.
Sent: Tuesday, July 11, 2000 5:39 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] 25G vs 45G



Greetings:

> I am getting ready to put up my first "real" tower. I am trying to decide
> between Rohn 25G and 45G. On the Rohn website, the windload specs for 25
and
> 45 are virtually the same at 80 feet. Is this true? How can this be
correct?

If you look closer at the Rohn book, the 45G spec shows an additional 8 SQ
feet
already factored into the allowable load rating for antenna standoff's at
the
top.  Presumably, these would be for a commercial tower, where you would
have several (Rohn specs 3) of these at the top to mount VHF/UHF sticks
or what have you.

In the ham calculation, you can add these 8 SQ feet to the allowable wind
load,
and then you see that 45G is much stronger than 25G at any wind speed.

73, J.P. W2XX


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