The MA-550 will clearly not pass 90 MPH calcs even
with no antenna, at least while extended. OTOH,
it will clearly pass 90 MPH nested with any reasonable
antenna. The question is whether the building permit
process recognizes nesting. One ploy might be to
get it approved nested, and then claim that when
it is extended, the additional sections count
as a temporary structure attached to the permanent
structure. Temporary structures, like cranes, are
exempt from building permits.
> -----Original Message-----
> From: email@example.com
> [mailto:firstname.lastname@example.org]On Behalf Of Aldewey@aol.com
> Sent: Saturday, September 09, 2006 11:17 AM
> To: email@example.com
> Subject: [TowerTalk] US Tower MA 550 Windloading - 90MPH?
> 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.
> Any help would be appreciated.
> Al, K0AD
> Plymouth, Minnesota
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