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5.2 DIAGRAM OF WORKING RADIUS AND LIFTING HEIGHT
・ The working radius/lifting height diagram indicates the relation between the working radius,
boom angle and lifting height above ground of this machine, without any load suspended.
・ “5.575m Boom” in the working radius/lifting height diagram shows the status where one half
of first
mark is extended from the second stage boom.
・ “7.075m Boom” in the working radius/lifting height diagram shows the status where one half
of second
mark is extended from the second stage boom.
1. Point A denotes a boom angle and point B denotes a lifting
height above ground in the figure at right.
The same working radius is applied to points A and B.
2. The “diagram of working radius and lifting height” shows the
relationships the working radius, boom angle, and lifting
height at no load, allowing for no deflection in the boom.
A deflection occurs in the boom when an object is hoisted,
which causes the working radius to widen slightly.
The rated total load decreases with increase in the working
radius. Actual crane operation requires the planning of work,
allowing for sufficient clearance more than that provided in
the diagram.
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