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Pag. 24
OM2016_US
Do not operate the machine when wind conditions exceed 28 mph (12.5 m/s).
Refer to Table Beaufort Scale (For Reference Only). Factors affecting wind speed
are; platform elevation, surrounding structures, local weather events, and approaching
storms.
Beaufort
Number
Wind Speed
Description
Land Conditions
mph
m/s
0
0
0-0.2
Calm
Calm. Smoke rises vertically
1
1-3
0.3-1.5
Light air
Wind motion visible in smoke
2
4-7
1.6-3.3
Light breeze
Wind felt on exposed skin. Leaves
rustle
3
8-12
3.4-5.4
Gentle breeze
Leaves and smaller twigs in con-
stant motion
4
13-18
5.5-7.9
Moderate
breeze
Dust and loose paper raised. Small
branches begin to move
5
19-24
8.0-10.7
Fresh breeze Smaller trees sway.
6
25-31
10.8-13.8 Strong breeze
Large branches in motion. Flags
waving near horizontal. Umbrella
use becomes diffi cult.
7
32-38
13.9-17.1
Near gale/
Moderate gale
Whole trees in motion. Effort nee-
ded to walk against the wind.
8
39-46
17.2-20.7
Fresh gale
Twigs broken from trees. Cars veer
on road.
9
47-54
20.8-24.4
Strong gale
Light structure damage.