Zoomlion ZRT850, Operator'S Manual

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Operator’s Manual for Rough Terrain Crane
F. If wind speed is greater than the permissible value of 45 ft/s (13.8 m/s), while the crane is
in operation, do the tasks that follow:

Stop the work (safely lower the load)

Retract the boom

Correctly stow the boom.
Table 5-1 Storm, Thunder and Lightning
To make an estimate of the wind speed, use the table that follows:
Table 5-2 Wind Force
WIND FORCE WIND SPEED
EFFECT OF THE WIND ON THE
LAND
BEAUFORT
SCALE
DESCRIPTIO
N
M/S FT-IN/S
0 Calm 0 –
8″
0 – 0.2 No wind, smoke rises vertically
1 Light Air
1′-4″– 4′-7″
0.4 – 1.4
Wind direction shown by smoke drift
but not by wind vanes
2 Light Breeze
5′-3″– 9′-10″
1.6 – 3
Wind felt on face, leaves rustle, vanes
move by wind
3
Gentle
Breeze
11′-2″– 17′-5″
3.4 – 5.3
Leaves and small twigs in constant
motion, wind extends light flag
4
Moderate
Breeze
18′-1″– 25′-7″
5.5 – 7.8 Small branches move
5 Fresh Breeze
26′-3″– 34′-9″
8 – 10.6 Small trees in leaf begin to sway
5-2