Motorola MotoWI4 PTP 600 Series - Manual (Page 170)

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12 Wind Loading
12.1 General
Antennas and electronic equipment mounted on towers or pole mounted on buildings will
subject the mounting structure to 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
2
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 18 and Table 19.
Lateral Force (Pound) at wind speed (mph) Largest Surface
Area (sq ft)
80 100 120 140 150
PTP 600 Series
Bridge - Integrated 1.36 37 57 82 112 129
PTP 600 Series
Bridge -
Connectorized 1.00 27 42 60 82 95
Table 18 - Lateral Force – Imperial