Bud,
Please see the correction to the last line below (if ice thickness
is 1/4 inch or less, it may be ignored).
TIA-222-G dated August 2005 provides the following wind and
ice specifications for Yavapai county, AZ:
Basic wind speed (3 second gust): 90 MPH
Basic wind speed (3 second gust, with ice conditions): 30 MPH
Maximum ice thickness: zero (see note below)
Although the ice thickness for Yavapai county is listed as zero
inches, TIA-222-G requires that ice conditions be considered if
both of the following conditions apply:
- if the tower poses a hazard to life (if it is near a house or
other areas frequented by people), and
- if the tower is in an exposed location, valley or gorge that is
subject to icing conditions. Ice may be ignored if thickness
does not exceed 1/4 inch.
73!
Frank
W3LPL
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