Beaufort Scale; Minimum Safety Distances - Haulotte COMPACT 8 Operating And Maintenance Instructions Manual

1.7 -

BEAUFORT SCALE

Description of Wind
0 Calm
1 Light Air
2 Light Breeze
3 Gentle Breeze
4 Moderate Breeze
5 Fresh Breeze
6 Strong Breeze
7 Near Gale
8 Gale
9 Strong Gale
1.8 -

MINIMUM SAFETY DISTANCES

6
The Beaufort Scale of wind force is accepted internationally and is used when
communicating weather conditions. It consists of number 0 - 17, each
representing a certain strength or velocity of wind at 10m (33 ft) above ground
level in the open.
Specifications for use on land
Calm; smoke rises vertically.
Direction of wind shown by smoke.
Wind felt on face; leaves rustle; ordinary vanes moved by
wind.
Leaves and small twigs in constant motion; wind extends
light flag.
Raises dust and loose paper; small Branches are moved.
Small trees in leaf begin to sway; crested wavelets form
on inland waterways.
Large branches in motion; whistling heard in telephone
wires; umbrellas used with difficulty.
Whole trees in motion; inconvenience felt when walking
against wind.
Breaks twigs off trees; generally impedes progress.
Slight structural damage occurs (chimney pots and slates
removed).
Our machines are not insulated, hence, it is important to maintain a safety
distance from the electrical power cables and devices according to applicable
government regulations and the following diagram :
Voltage
Up to 300V
from 300 V to 50 kV
from 50 kV to 200 kV
from 200 kV to 350 kV
from 350 kV to 500 kV
from 500 kV to 750 kV
from 750 kV to 1000 kV
Operating and maintenance instructions
MPH
0-1
1-5
6-11
12-19
20-28
29-38
39-49
50-61
62-74
75-88
Minimum safety distance in meters
avoid contact
3,05 m
4,60 m
6,10 m
7,62 m
10,67 m
13,72 m
m/s
0-0.2
0.3-1.5
1.6-3.3
3.4-5.4
5.5-7.9
8.0-10.7
10.8-13.8
13.9-17.1
17.2-20.7
20.8-24.4