User guide

45 Mbps Backhaul User Guide
Issue 3, December 2004 Page 93 of 113
Note : When the connectorized version of 45 Mbps Backhaul is used with external antennas, the figures from
the antenna manufacturer for lateral force should be included to calculate to total loading on the mounting
structure.
10.3 45 Mbps Backhaul Capabilities
The structure and mounting brackets of the ODU are capable of withstanding wind speeds up to 151mph
(242kph). The installer should ensure that the structure the ODU is attached to is also capable of withstanding
the prevalent wind speeds and loads.
10.4 Wind Speed Statistics
Installers are recommended to contact the national meteorological office for the country concerned to identify
the likely wind speeds prevalent at the proposed location. This will enable the installer to estimate the total
wind loading on the support structures.
Examples of the sort of statistics that are available are:
USA
Reported Fastest Single Wind Velocities for Selected U.S. Cities
(Source: National Weather Service)
City, State
Wind Velocity
(mph)
Bismarck, North Dakota
72
Buffalo, New York
91
Chicago, Illinois
87
Hatteras, North Carolina
110
Miami, Florida
132
New York, New York
99
Pensacola, Florida
114
UK
Meteorological Office, www.meto.gov.uk
Peak windspeed contour maps can be found as Fig 3a/3b at:
http://www.meto.gov.uk/education/historic/1987.html