Capabilities Of The Ptp 500 Series Bridges; Wind Speed Statistics - Motorola MOTOWI 4 User Manual

Note: When the connectorized version of 500 Series bridge 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.

12.3 Capabilities of the PTP 500 Series Bridges

The structure and mounting brackets of the PTP Series systems are capable of withstanding wind
speeds up to 151mph (242 kph). The installer should ensure that the structure to which the 500
Series Bridge is fixed to is also capable of withstanding the prevalent wind speeds and loads.

12.4 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)
UK Meteorological Office,
Peak wind speed contour maps can be found as Fig 3a/3b at:
http://www.meto.gov.uk/education/historic/1987.html
Wind Loading
City, State
Bismark, North Dakota
Buffalo, New York
Chicago, Illinois
Hatteras, North Carolina 110
Miami, Florida
New York, New York
Pensacola, Florida
http://www.meto.gov.uk
Wind Velocity (mph)
72
91
87
132
99
114
144