- 232 -
22. Crane operation when the outriggers are used
(1) Outrigger reaction forces
Never operate the crane on soft ground. The ground must be
reinforced appropriately for supporting the crane
(
such as by
using steel plates to increase the supportable load).
In order to properly reinforce the ground to ensure the crane can
be operated safely, it is necessary to determine how much force
the ground can support. In other words, it requires calculating
the outrigger reaction force.
(2)
Improve the ground surface as far as possible if it is soft, crumbly, uneven or sloping. Use wooden blocks etc. if
necessary to produce a flat surface and then set the outriggers on steel plates etc. of adequate areas and rigidity to
reduce surface pressure further.
(3)
Ground which appears to be strong can have dangerously inadequate strength due to ground conditions below the
surface. Avoid areas which are likely to suffer such problems as listed below, and set the outrigger floats on steel
plates etc. of adequate areas and rigidity to guard against potentially weak soil.
・
Surfaces paved with plain asphalt
・
Surfaces paved with thin concrete
・
Brick or cobbled road surfaces
・
Areas where soil under the road paving has been eroded by water to leave a void
・
Areas where the soil is very dry but soft
・
Road shoulders or near construction excavations
Set the crane level with full consideration for the above points.
If the crane is not set level, the reduction in the crane's lifting capacity can be unexpectedly
severe. If you use the crane without noticing and correcting the inclination, it could tip over or
the boom could be broken even if the load is well below the lifting capacity.
(541A-0180-2E)
Summary of Contents for PREMIUM CITYRANGE CR-200RF
Page 2: ...218711 背厚 14 5 mm 中 ...
Page 14: ... 12 4 Dimensions T217591 021 0E Specification of CR 200Rf ...
Page 16: ... 14 MEMO ...
Page 24: ... 22 MEMO ...
Page 30: ... 4 MEMO ...
Page 36: ... 10 MEMO ...
Page 38: ... 12 3 General operation devices 2 Outside the cab ...
Page 60: ... 34 MEMO ...
Page 74: ... 48 MEMO ...
Page 82: ... 56 7 Air conditioner 7 6 Display when errors are detected T217921 020 0E ...
Page 120: ... 94 MEMO ...
Page 129: ... 102 MEMO ...
Page 138: ... 111 17 Drive operation devices Drive operation devices ...
Page 139: ... 112 17 Drive operation devices ...
Page 153: ... 126 17 Drive operation devices ...
Page 154: ... 127 17 Drive operation devices Drive operation devices ...
Page 237: ... 208 21 Crane operation devices 21 Crane operation devices 061A 0005 0E 1 Inside the cab ...
Page 238: ... 209 21 Crane operation devices Crane operation devices ...
Page 239: ... 210 21 Crane operation devices 2 Outside the cab ...
Page 259: ... 230 22 Crane operation when the outriggers are used ON OFF ...
Page 299: ... 270 24 Crane operation NOTE Extension retraction sequence for each boom length ...
Page 320: ...26 Preoperational checks Pre drive checks 290 ...
Page 321: ...Preoperational checks Pre drive checks 26 Preoperational checks Pre drive checks 291 ...
Page 322: ...26 Preoperational checks Pre drive checks 292 ...
Page 329: ...Preoperational checks Pre drive checks 26 Preoperational checks Pre drive checks 299 ...
Page 330: ...26 Preoperational checks Pre drive checks 300 ...
Page 331: ...Preoperational checks Pre drive checks 26 Preoperational checks Pre drive checks 301 ...
Page 332: ... 302 MEMO ...
Page 340: ... 310 MEMO ...
Page 342: ...899 92187110 ...