Wind Loading; General; Calculation Of Lateral Force; Table 39 - Lateral Force - Imperial - Motorola PTP 600 Series User Manual

12 Wind Loading

12.1 General

Antennas and electronic equipment mounted on towers or pole mounted on 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.

12.2 Calculation of Lateral Force

The 600 Series bridge with or without the integral antenna is essentially a flat structure and so
the magnitude of the lateral force can be estimated from:
Force (in pounds) = 0.0042 . A . v
Where A is the surface area in square feet and v is the wind speed in miles per hour.
The lateral force produced by a single 600 Series bridge (integrated or connectorized model)
at different wind speeds is shown in Table 39 and Table 40.
PTP 600 Series
Bridge - Integrated
PTP 600 Series
Connectorized
PTP 600 Series
Bridge - Integrated
PTP 600 Series-
Connectorized
2
Table 39 - Lateral Force – Imperial
Largest Surface Lateral Force (Pound) at wind speed (mph)
Area (sq ft)
80
1.36
36.6
1.00
26.9
Table 40 - Lateral Force – Metric
Largest Surface Lateral Force (kg) at wind speed (m/s)
Area (sq m)
30
0.130 12
0.093 9
232
12 Wind Loading
100 120 140
57.1 82.3 146.2
42 60.5 107.5
40 50 60
22 34 49
16 24 35
150
228.5
168.0
70
66
48