Table 2-2 Lateral Force - Metric; Table 2-3 Lateral Force - Us - Motorola PTP 250 User Manual

Site planning
The lateral force produced by a single PTP 250 ODU (integrated or connectorized
model) at different wind speeds is shown in
Table 2-2 Lateral force – metric
Type of ODU
Integrated
Connectorized
Calculation of lateral force (US)
The magnitude of the lateral force can be estimated from:
Force (in pounds) = 0.0042Av
The lateral force produced by a single PTP 250 ODU (integrated or connectorized
model) at different wind speeds is shown in
Table 2-3 Lateral force – US
Type of ODU
Integrated
Connectorized
NOTE
2-6
Largest
surface area
(square meters)
0.130
0.093
Where:
A
v
Largest
surface area
(square feet)
1.36
1.00
When the connectorized ODU is used with external antennas, the figures
from the antenna manufacturer for lateral force should be included to
calculate the total loading on the mounting structure.
Table 2-2.
Lateral force (Kg) at wind speed
(meters per second)
30 40 50
12 22 34
9 16 24
2
Is:
surface area in square feet
wind speed in miles per hour
Table 2-3.
Lateral force (lb) at wind speed
(miles per hour)
80 100 120
36.6 57.1 82.3
26.9 42 60.5
Chapter 2 Planning considerations
60 70
49 66
35 48
140 150
146.2 228.5
107.5 168.0
phn-2182_002v000
May 2011