Operator’s 履带起重机操作手册 Manual for Crawler Crane
3.4 Requirements for operating site It is very important to choose an appropriate location for crane operation in order to minimize safety risks. The operating site should be selected so that: a)
Crane movement can be carried out within the smallest possible radius.
b)
No obstacles hinder necessary movements.
c)
The ground of the operating site is able to support expected loads.
DANGER The most essential requirement for safe crane operation is working on firm ground with the capacity to support your loads.
3.4.1 Slopes and trenches Safety Guidelines
The crane can not be too close to slopes or trenches. A safety distance must always be kept from them depending on the type of soil.
安 全 准 则
Figure 3-8 Safety distance from slopes and trenches
CAUTION Safety distance is measured from the foot of the trench and it is: 1.
Soft or backfilled soil = 2× depth of trench (A2 = 2×T) ;
2.
Hard or natural soil = 1×depth of trench (Al = 1×T).
DANGER If a safe distance is not maintained, the slope or trench must be firmly filled. Otherwise, there is a danger that the edge of the slope or trench will collapse.
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ZCC1100H Crawler Crane
