DEHN + SÖHNE HVI power Montageanleitung Seite 61

6.4 Installation with regard to the wind zone / wind speed
When installing air-termination systems, the wind zones must be observed (see Fig. 13, page 29). These
wind zones differ from region to region. When installing air-termination systems outside of Germany,
the country-specific 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 fulfilled with
regard to the wind load:
Tilt resistance of the air-termination rod
Â
Break resistance of the air-termination rod
Â
The required separation distance from the object to be protected must be maintained even under
Â
wind load (prevention of intolerable bending)
Bremen
Essen
Dortmund
Düsseldorf
Köln
Bonn
Frankfurt
Wiesbaden
Saarbrücken
Mannheim
Stuttgart
Freiburg
Figure 13 Wind zones in Germany (source: DIN EN 1991-1-4/NA, Annex NA.A: wind zone map)
Therefore, the individual components such as air-termination rod, supporting tube, three-legged stand,
etc. must be chosen for the wind speeds to be expected depending on the design of the building.
Kiel
Rostock
Schwerin
Hamburg
Berlin
Hannover
Potsdam
Magdeburg
Halle
Leipzig
Dresden
Erfurt
Chemnitz
Würzburg
Nürnberg
Regensburg
Augsburg
München
Parameters for calculation:
Â
Environment III: suburban, industrial area
Â
Height of the building: 40 m
Â
Height above sea level: up to 800 m
wind zone base wind speed
(fixed)
wind zone 1 22.5 m/s
wind zone 2 25.0 m/s
wind zone 3 27.5 m/s
wind zone 4 30.0 m/s
gust wind
speed
128 km/h
142 km/h
156 km/h
170 km/h
29