Section 3 –WORKING RADIUS/LIFTING HEIGHT Mini-Crawler Crane M A E D A
3-20 9/2020 MC285CB-3
Point A denotes a boom angle and point B
denotes a lifting height above ground. The same
working radius is applied to points A and B.
Fig 3-19
"WORKING RADIUS/LIFTING HEIGHT" on page
3-19 shows the relationships between the working
radius, boom angle and lifting height at no load,
with no deflection in the boom. A deflection occurs
in the boom when an object is hoisted, which
causes the working radius to widen slightly. This is
load radius. The rated total load decreases with
increase in the working radius. Actual crane
operation requires planning of work, allowing for
sufficient clearance more than that provided in the
diagram.
Fig 3-20
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