Beaufort scale (for reference only) -9 – JLG 1500SJ Operator Manual User Manual

Page 23

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SECTION 1 - SAFETY PRECAUTIONS

3121261

– JLG Lift –

1-9

DO NOT OPERATE THE MACHINE WHEN WIND CONDITIONS EXCEED 28 MPH (12.5 M/
S).

Table 1-2. Beaufort Scale (For Reference Only)

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 constant 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 difficult.

7

32-38

13.9-17.1

Near Gale/Moderate Gale

Whole trees in motion. Effort needed 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.

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