Wind Loading; General; Calculation Of Lateral Force; Table 18 - 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 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 18 and Table 19.
PTP 600
Bridge - Integrated
PTP 600
Bridge
Connectorized
Largest Surface
Area (sq ft)
Series 1.36
Series 1.00
-
Table 18 - Lateral Force – Imperial
2
Lateral Force (Pound) at wind speed (mph)
80 100
37 57
27 42
168
120 140 150
82 112 129
60 82 95