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4. Installation with regard to the wind zone / wind speed
When installing air-termination systems, the wind zones must be observed (see Fig. 9). These wind
zones differ from region to region. When installing air-termination systems outside of Germany, the
country-specifi c requirements concerning wind zones / wind speeds must be considered.
To calculate the actual wind load to be expected, the zone-dependent wind load, building height and
local conditions (detached building, building in open terrain or building surrounded by other buildings)
must also be considered.
When designing self-supporting air-termination rods, the following requirements must be fulfi lled with
regard to the wind load:

Tilt resistance of the air-termination rod

Break resistance of the air-termination rod

The required separation distance from the object to be protected must be maintained even under
wind load (prevention of intolerable bending)
Figure 9
Wind zones in Germany (source: EN 1991-1-4/NA, annex NA.A: Wind zone map)
The air-termination rods are dimensioned based on EN 1991-1-4 (see Figure 9). Technical specifi cations
for our components for performing static calculations are available on request. DEHN + SÖHNE only
assumes warranty if the information provided above is observed.
München
Augsburg
Regensburg
Nürnberg
Würzburg
Stuttgart
Freiburg
Saarbrücken
Mannheim
Frankfurt
Wiesbaden
Köln
Düsseldorf
Bonn
Essen
Dortmund
Erfurt
Chemnitz
Dresden
Leipzig
Halle
Magdeburg
Berlin
Potsdam
Hannover
Bremen
Hamburg
Schwerin
Rostock
Kiel
wind zone base wind speed
(fi xed)
gust wind
speed
wind zone 1 22,5 m/s 128 km/h
wind zone 2 25,0 m/s 142 km/h
wind zone 3 27,5 m/s 156 km/h
wind zone 4 30,0 m/s 170 km/h
Parameters for calculation:

Environment III: suburban, industrial area

Height of the building: 40 m

Height above sea level: up to 800 mmax. Windzone 2

max. wind zone 1/2