Odu Wind Loading - Cambium Networks PTP 650 Series User Manual

Chapter 3: System planning

ODU wind loading

Ensure that the ODU and the structure on which it is mounted are capable of withstanding the
prevalent wind speeds at a proposed PTP 650 site. Wind speed statistics should be available from
national meteorological offices.
The ODU and its mounting bracket are capable of withstanding wind speeds of up to 323 kph
(200 mph).
Wind blowing on the ODU will subject the mounting structure to significant lateral force. The
magnitude of the force depends on both wind strength and surface area of the ODU. Wind loading
is estimated using the following formulae:
Force (in kilogrammes) = 0.1045aV
Where:
Force (in pounds) = 0.0042Av
Where:
Applying these formulae to the PTP 650 ODU at different wind speeds, the resulting wind loadings
are shown in Table 26 and
Table 26 ODU wind loading (Kg)
Type of ODU Max surface area
(square meters)
Integrated 0.130
Connectorized 0.093
Table 27 ODU wind loading (lb)
Type of ODU
Integrated
Connectorized
2
Is:
a
V
2
Is:
A
v
Table 27.
Wind speed (meters per second)
30
12 Kg
9 Kg
Max surface area Wind speed (miles per hour)
(square feet)
80
1.36 37 lb
1.00 27 lb
Page
surface area in square meters
wind speed in meters per second
surface area in square feet
wind speed in miles per hour
40 50 60
22 Kg 34 Kg 49 Kg
16 Kg 24 Kg 35 Kg
100 120 140
57 lb 82 lb 146 lb
42 lb 61 lb 108 lb
3-11
Site planning
70
66 Kg
48 Kg
150
229 lb
168 lb