Beaufort Scale (For Reference Only) - JLG 1930ES Operation And Safety Manual

SECTION 1 - SAFETY PRECAUTIONS
DO NOT OPERATE THE MACHINE WHEN WIND CONDITIONS EXCEED SPECIFICATIONS SHOWN IN SECTION 5, TABLE 5-2 OR AS SHOWN ON THE CAPACITY PLACARD ON THE PLAT-
FORM BILLBOARD.
BEAUFORT
NUMBER
0
1
2
3
4 13-18
5 19-24
6 25-31
7 32-38
8 39-46
9 47-54
1-8
Table 1-2. Beaufort Scale (For Reference Only)
WIND SPEED
DESCRIPTION
mph m/s
0 0-0.2 Calm
1-3 0.3-1.5 Light air
4-7 1.6-3.3 Light breeze
8-12 3.4-5.4 Gentle breeze
5.5-7.9 Moderate breeze
8.0-10.7 Fresh breeze
10.8-13.8 Strong breeze
13.9-17.1 Near Gale/Moderate Gale
17.2-20.7 Fresh Gale
20.8-24.4 Strong Gale
LAND CONDITIONS
Calm. Smoke rises vertically.
Wind motion visible in smoke.
Wind felt on exposed skin. Leaves rustle.
Leaves and smaller twigs in constant motion.
Dust and loose paper raised. Small branches begin to move.
Smaller trees sway.
Large branches in motion. Flags waving near horizontal. Umbrella
use becomes difficult.
Whole trees in motion. Effort needed to walk against the wind.
Twigs broken from trees. Cars veer on road.
Light structure damage.
– JLG Lift – 3121655