[TowerTalk] 25G vs 45G
J.P.
w2xx@cloud9.net
Tue, 11 Jul 2000 20:39:02 -0400
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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