XCT80 Truck Crane Operation Manual
4-8
casually;
e. lifting weight along the horizontal direction as much as possible to reduce high-frequency ray
absorption;
f. when doing some necessary manual operations, firstly put it on the ground or insulation place;
g. use the appropriate detection equipment to test temperatures of the used tools, if the distance
tool in the range of 1cm ~ 2cm is measured of 500V voltage, the tool may not be touched by hand;
h. processing the ammable objects requires that the distance far from massive metal plate of easy
electric spark is at least 6m;
i. once the accident or special phenomena occur, one should be timely report to supervisor or
safety engineer.
3. Crane machine management nearby airport
When the crane is used nearby the airport, one should obey the local laws and regulations.
4-3-3 Wind load inuence
Before the crane operation, crane operators must determine if it is suitbale for the crane operation
according to meteorological data published by the authority. The maximum working wind force of
crane is five scale (wind speed 14.1m/s and wind pressure 125N/m
2
).
1.Object anemometer
During the crane operation,the standard is the instantaneousaneous wind speed of the working
height. Relations of wind scale and wind speed of weather forecast in table 4-3.
After the calculation of 10min average wind speed at the height of 10m from the open ground
times the conversion factor 1.5, the 3s instantaneousaneous wind speed is obtained,that is, the working
wind speed.
Construction instructions
Average wind
speed(m/s)
Instantaneous wind
speed(m/s)
Name Scale Instructions (land)
0.0～0.2 0.0～0.3 Calm 0 Still, smoke will rise vertically.
0.3～1.5 0.5～2.3 Light air 1 Rising smoke drifts, wind vane is inactive.
1.6～3.3 2.4～5.0 Light breeze 2
Can feel wind on your face, leaves rustle, wind
vanes begin to move.
3.4～5.4 5.1～8.1 Gentle breeze 3
Leaves and small twigs move, light weight ags
extend.
5.5～7.9 8.3～11.9 Moderate breeze 4 Small branches move, raises dust, leaves and paper.
8.0～10.7 12～16.1 Fresh breeze 5 Small trees sway.
10.8～13.8 16.2～20.7 Strong breeze 6
Large tree branches move, telephone wires begin
to "whistle", umbrellas are difficult to keep under
control.
13.9～17.1 20.9～25.7 Fresh gale 7 Large trees sway, becoming difficult to walk.
17.2～20.7 25.8～31.1 Moderate gale 8
Twigs and small branches are broken from trees,
walking is difficult.
20.8～24.4 31.2～36.6 Strong gale 9
Slight damage occurs to buildings, shingles are
blown off of roofs.（chimney top and at top
shake）
24.5～28.4 36.8～42.6 Whole gale 10
Rare on land, trees are broken or uprooted, building
damage is considerable.
28.5～32.6 42.8～48.9 Storm 11 Much rare on land, extensive widespread damage.
>32.7 >49.1 Hurricane 12 Most rare on land, extreme destruction, devastation.
Chapter 4
Table 4-3 Objective images wind speed table
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