In a message dated 9/9/2006 5:57:18 P.M. Pacific Daylight Time,
towertalk-request@contesting.com writes:
> I am applying for a building permit to put up a US Tower MA-550 with a
Force
12 C4 Yagi in Minnesota.
> The City is asking to see wind loading calculations for 90 MPH as well as
calculations for radial ice. I am trying to convince them that I will have
it
nested most of the time (which I will). The info I got from US Tower has a
lot
of detail but it only goes up to 70 mph. Has anyone run these calculations
on
this tower for 90 mph both fully extended and nested?
For neighborhood aesthetics, I really want to stay with the tubular look.
I think someone has already mentioned that it won't make that windspeed
fully extended. The last one I got a PE stamp for (I think it was a
72-footer) was for 85 MPH and it was rated for a 25 pound load. The rating
goes to
zero and below at higher windspeeds.
You better get the lattice one or go with a non-crank-up self-supporter
or a guyed tower to get what you need.
Cheers,
Steve K7LXC
TOWER TECH
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