User's Guide Part 1

User Guide: PTP 600 Series Site planning
phn-0896_009v003
Feb 2010
UNDER DEVELOPMENT
2-7
Wind loading
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.
Calculation of lateral force
The PTP 600 Series 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 (integrated or connectorized model)
at different wind speeds is shown in Table 2-1 an
d Table 2-2.
Table 2-1 Lateral force – imperial
Lateral Force (Pound) at wind speed
(mph)
Largest
Surface Area
(sq ft)
80 100 120 140 150
PTP 600 Series -
Integrated
1.36 36.6 57.1 82.3 146.2 228.5
PTP 600 Series -
Connectorized
1.00 26.9 42 60.5 107.5 168.0