3.4 WORKING RADIUS/LIFTING HEIGHT DIAGRAMS M A E D A Crawler Crane
3-18 5/2020 CC1908S-1
WORKING
RADIUS/LIFTING HEIGHT
DIAGRAMS
WARNING
• The working radius and lifting height
diagram shows the relationship under no
load and does not include boom deflection.
• Stage "4" in the working radius and lifting
height diagram indicates that one half
portion of the "mark" is exposed from the
4th stage boom.
1.
Point A in the figure indicates the boom angle
and point B, the lifting height above the
ground.
The working radius for points A and B are the
same.
However, they differ when using a single fall.
2.
The working radius and lifting height diagram
shows the relationship under no load and
does not include boom deflection.
Deflection occurs in the boom when an object
is hoisted, which causes the working radius to
widen slightly.
The rated total load decreases as the working
radius increases. Actual crane operation
requires planning for work, allowing for
sufficient clearance beyond that indicated in
the diagram.
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