General information

Wind and snow loads

Representing key climatic factors that affect the building to a varying degree, wind and snow loads must – in addition to the sash weight – be included in the decision for the most suitable drive.

One aspect of foremost importance – especially when creating SHE openings – is to ensure that the drive is capable of opening the window even if exposed to wind or weighed down by snow load in the roof area. ...mehr lesen

Wind load

The factors that affect the force of the wind load to the most significant degree are the wind climate, as illustrated in the DIN 1055-4 standard by a map of wind zones, and the geographical position. These conditions bring about various speed pressure levels that are also linked to the height of the building.

Wind zone

Speed pressure q in kN/m² at a building height h within the limits of


    h ≤ 10 m 10 m < h ≤ 18 m

18 m < h ≤ 25 m

1 Non-coastal region 0,50 0,65 0,75
2 Non-coastal region 0,65 0,80 0,90

Coastal region and islands in the Baltic Sea

0,85 1,00 1,10
3 Non-coastal region 0,80 0,95 1,10

Coastal region and islands in the Baltic Sea

1,05 1,20 1,30
4 Non-coastal region 0,95 1,15 1,30

Coastal region of the North and Baltic Sea and islands in the Baltic Sea

1,25 1,40 1,55

Islands in the North Sea



Idealised map of wind zones

Snow load

The factors affecting the force of the snow load in a material way are the geographical position and the roof pitch. Standard DIN 1055-5 includes a map of snow load zones that defines the various snow loads as a function of ground level elevation A above sea level.

Idealised map of the snow load