PMP 450 Planning Guide
Wind loading
Ensure that the site will not be prone to excessive wind loading.
Antennas and equipment mounted on towers or buildings will subject the mounting structure to significant lateral
forces when there is appreciable wind. Antennas are normally specified by the amount of force (in pounds) for
specific wind strengths. The magnitude of the force depends on both the wind strength and size of the antenna.
Calculation of lateral force (metric)
The magnitude of the lateral force can be estimated from:
Force (in kilograms) = 0.1045aV
2
Where:
Is:
a
surface area in square meters
V
wind speed in meters per second
The lateral force produced by a single PMP 450 at different wind speeds is shown in
Table 27 Lateral force - metric
Table 27 Lateral force - metric
Largest
surface area (square meters)
Lateral force (Kg) at wind speed
(meters per second)
30
40
50
60
70
.066 (AP – 5 GHz, 60 Degree Sector)
6
11
17
25
34
.083 (AP – 5 GHz, 90 Degree Sector)
8
14
22
31
43
.27 (AP – 2.4 GHz, 60 Degree Sector)
25
45
71
102
138
.088 (AP – 3.5 GHz, 90 Degree Sector)
8
14
22
33
45
.088 (AP – 3.6 GHz, 90 Degree Sector)
8
14
22
33
45
.0027 (SM)
0.25
0.45
0.7
1
1.4
1-66
pmp-0047 (March 2014)
Summary of Contents for PMP 450
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