12
WIND SPEED
To gauge the wind speed, use an anemometer and refer to the chart below for guidance only.
STABILITY
Use of the machine is only permied when the vehicle is correctly stabilised and levelled.
There is a spirit level in the stabilisaon controls area.
• Air bubble in the middle > the vehicle is horizontal
• Air bubble in between the two circles > vehicle lted by between 0° and 5°
GROUND CONDITIONS
Ensuring ideal ground condions when the MEWP is resng on the ground is crucial for the machine’s stability. Steep slopes
may yield under the weight of the outriggers or the wheels, in which case the machine may end up in an unstable posion with
a risk of overturning. Therefore before moving, using or posioning a MEWP, it is essenal to assess the type of ground (its
properes) and the gradient of the area where the machine will be standing. If you are even the slightest bit concerned that the
ground could give way, check the level of the machine regularly and adjust the outriggers, support plates and ground shoring.
2.2 CONDITIONS FOR OPERATION
Wind Force Wind Speed
Eect of wind inland
Beaufort
Number
Name
m/s km/h
0 calm <0.3 1 Calm, smoke moves directly upwards
1
light air
0.3 - 1.5 1- 5 Wind direcon only indicated by the movement of smoke, not by a weather cock
2
light breeze
1.6 - 3.3 6 - 11 The wind can be felt against your face, leaves rustle, weathercocks move
3 gentle breeze 3.4 - 5.4 12 - 19 Leaves and branches move, the wind unfolds wind sleeves
4
moderate breeze
5.5 - 7.9 20 - 28 The wind picks up loose paper and cardboard, moves branches and thin poles
5 fresh breeze 8.0 - 10.7 29 - 38 Small hardwoods begin to wave, wave foam appears on lakes
6
strong breeze
10.8 - 13.8 39 - 49 Poles move violently, telephone cables whistle, it is dicult to use an umbrella
7
moderate gale
(or near gale)
13.9 - 17.1 50 - 61 All the trees move, it is slightly dicult to move against the wind
8
fresh gale
(or gale)
17.2 - 20.7 62 - 74 Branches break o trees, it is considerably dicult to walk outside
9
strong gale
20.8 - 24.4 75 - 88 Slight damage to houses (chimney tops and roof les are swept o)
10
whole gale
(or storm)
24.5 - 28.4 89 - 102 Trees are uprooted, considerable damage to houses
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