What windload does my antenna have?

With our antennas the windload is always stated as force, unit Newton [N], relative to a defined windspeed.

The windload can be calculated from the antenna surface:

F = q * A
with F Windload in N
  q Wind pressure in N/m² (see below)
  A Surface of antenna in m²

Depending on expected windspeed the wind pressure is assumed as (according to EN 60728-11):

  • q = 800N/m²: max. Windspeed 130km/h (Antenna less than 20m above ground)
  • q = 1100N/m²: max. Windspeed 150km/h (Antenna more than 20m above ground)
  • q = 1250N/m²: max. Windspeed 160km/h (on hills or at the coast)

When re-calculating the windload to a different windspeed please note that the wind pressure grows exponentially (squared) with the windspeed! Double windspeed meand 4 times the windload...
All calculations at your own risk...

Approximative formula for stacking distance of antennas:

S = L / (2* sin(a/2))
where
S = Stacking distance
L = Wavelength
A = 3 dB angle of antenna