Cambium PTP 450 series, Руководство пользователя

Страница: 56 / 180

PTP 450 User Guide Site planning
2-36
ptp-450 (July 2014)
Wind loading
Ensure that the site is not 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 PTP 450 at different wind speeds is shown in Table 17 Lateral force - metric
and Table 18 Lateral force - US .
Table 17 Lateral force - metric
Largest
surface area (square meters) Lateral force (Kg) at wind speed
(meters per second)
30 40 50 60 70
.0027 (BHS) 0.25 0.45 0.7 1 1.4