32
PAY ATTENTION TO WEATHER INFORMATION
• A risk of lightning exists in case of a thunderstorm, so abort operating the crane, immediately lower the
load and retract the boom.
• Wind can cause the hoisted load to move back and forth, which could cause the machine to become
unstable. If the hoisted load is affected, immediately lower the load and retract the boom.
• If the maximum instantaneous wind speed is 10 m/s or greater, abort operating the crane, immediately
lower the load and retract the boom.
• Even when the maximum instantaneous wind speed is below 10 m/s, the bigger the hoist load, the
higher the hoist load position, or the longer the boom can increase the effect from the wind. Be very
careful during the work.
• When operating the extended boom, the winch wire rope and electric signal cables are prone to be
blown up by winds, and thus be cautious of the operation. Similarly, the peripheral area of a high-rise
building, winds blow its sides and may gather their velocity much higher, which deserve attention.
• When a load such as a steel plate that has a large area exposed to wind is being hoisted, the wind
arriving from front/rear/side of the boom may cause the machine to trip or damage the boom. Be very
careful during the work.
• The higher the boom is derricked, the higher the probability of tumbling backward is raised by wind
blowing from ahead. Thus, adequate attention is required in the operation.
• When an earthquake occurs, abort the operation and wait until it is over.
The following table indicates approximate relation between the wind speed and wind effect. The wind
speed mentioned in the weathercast is mean wind velocity (m/s) during 10 minutes at 10 m above
the ground.
Force
Wind Speed (m/s)
Effect On Land
0
Less than 0.3
Smoke rises vertically.
1
0.3 or more and less than 1.6
Wind motion visible in smoke.
2
1.6 or more and less than 3.4
Wind felt on exposed skin.
3
3.4 or more and less than 5.5
Leaves and small twigs move in constant motion.
4
5.5 or more and less than 8.0
Dust and loose paper blow up. Small branches begin to
move.
5
8.0 or more and less than 10.8
Bushes with leaves start to sway. Waves form on the face of
pond/swamp.
6
10.8 or more and less than 13.9
Large branches begin to move. Whistling heard in electrical
wires. Use of umbrella becomes difficult.
7
13.9 or more and less than 17.2
Whole trees start to shake. Effort needed to walk against the
wind.
8
17.2 or more and less than 20.8
Twigs broke from trees. Progress impeded.
9
20.8 or more and less than 24.5
Light structure damage. Slates blown off.
10
24.5 or more and less than 28.5
Trees uprooted. Considerable structural damage.
11
28.5 or more and less than 32.7
Widespread structural damage.
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Страница 59: ...51 24 Machine Mass 542 4773100 28 Working Radius Rated Total Load Chart 542 3582200...
Страница 60: ...52 30 Safe Operation 557 3494500 31 Operating the Moment Limiter 542 2250000...
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Страница 251: ...243 2 SPECIFICATION DIMENSIONAL DRAWING...
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Страница 262: ...254 3 MONITOR INDICATION 1 Searcher hook selector switch 2 Searcher hook position display...
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