USER
MANUAL
810NG
T
U
SE
B.47
7845470-01 03/20
subject to change without notice
B.8.4
IN-SERVICE WIND
The crane is designed to withstand occasionals loads due to the wind effects.
According to EN 13001-2, the crane can be safely operated under the following wind state:
- Wind state: Light
- Max. mean wind speed: v = 9.4 m/s (34 km/h, 5 Beaufort)
If the wind speed should exceed the limit above, then a derating factor shall be applied to the max.
working pressure, as follows:
p
r
=
κ
w
· p
max
where:
κ
w
is the derating factor to apply at mean wind speed of over 9.4 m/s
p
r
is the reduced pressure
p
max
is the max. working pressure under standard conditions
The graphic below shows the trend of
κ
w
as the wind speed (v) changes.
It is recommended to not operate the crane when the wind speed exceeds 18.9 m/s (68 km/h,
8 Beaufort).
The table below shows the derating factors for normal and heavy wind state:
Wind state
v
(m/s)
Derating factor
κ
w
Light
9.4 (5 Beaufort)
1.00
Normal
13.3 (6 Beaufort)
0.90
Heavy
18.9 (8 Beaufort)
0.70