Sottezza II Stretch/ LED / Sottezza II OptiStretch/ LED
Maintenance Instructions and Directions for Use
Version 4
2020-05-06
We reserve the right to make technical changes
Item number
118074-0000
Page 5/13
Explanation of wind resistance classes
Wind resistance class
0
1
2
3
Beaufort
< 3
4
5
6
Maximum wind speed
in km/h
19,0
28,0
38,0
49,0
in m/s
5,4
7,9
10,7
13,8
in mp/h
12,6
18,3
25,3
32,2
Wind resistance class 0
Wind resistance class 0 equates (in accordance with DIN EN
13561) either to a level of performance that is not required or has
not been measured, or to a product that does not meet the
requirements of Class 1. The sun protection system must not be
used in windy conditions.
Wind resistance class 1
The sun protection system may only remain open until winds
have reached wind strength 4.
Definition acc. to the Beaufort scale: light breeze, light wind
Wind moves small tree branches and twigs, lifts dust and loose
paper
Wind speed 20-27 km/h = 5.5-7.4 m/s
Wind resistance class 2
The sun protection system may only remain open until winds
have reached wind strength 5.
Definition acc. to the Beaufort scale: fresh breeze, fresh wind
Small trees in leaf begin to sway,
whitecaps form at sea
Wind speed 28-37 km/h = 7.5-10.4 m/s
Wind resistance class 3
The sun protection system may only remain open until winds
have reached wind strength 6.
Definition acc. to Beaufort scale: strong breeze
Larger tree branches move, umbrellas are hard to hold, telegraph
lines whistle in the wind
Wind speed 38-48 km/h = 10.5-13.4 m/s
Source: German Met Office (DWD) - Offenbach
