DEFINITIONS
Articulation – The crane pivots in the middle to allow steering and slewing of the
load. Up to 40 Articulation is possible in either direction. See Working Area diagram
Deration – A decrease in the Rated Capacity due to external influences, expressed as
a percentage.
Freely Suspended Load – Load hanging free with no direct external force applied
except by the winch rope.
Gradient: Generalised slope of ground measured as a percentage.
Load Radius –The horizontal distance from the centre of the freely suspended
hoisting hook perpendicular to a vertical plane containing the front axle.
Loaded Boom Angle – This is given to assist in setting up the crane only. It gives
only an approximation of the Load Radius for a specified boom length. “Boom Angle”
on Rated Capacity charts refers to the angle between the boom and true horizontal.
(Refer to image below)
Load Moment Indicator (LMI) - A system that displays rated capacity for the given
configuration. An audible warning sounds when rated capacity is approached and
reached.
Pitch Angle – The forward tilt
of the crane, the angle
between the chassis of the
front of the crane and true
horizontal in the longitudinal
direction. The pitch is positive
when the front is higher than
the rear. In the image shown,
the pitch angle is negative.
Rated Capacity (RC) – The total Freely Suspended Load, including the mass of
material and load handling equipment, that the machine can safely lift under ideal
conditions at a given configuration.
Roll – The side tilt of the crane chassis, the angle
between the front chassis of the crane and true
horizontal. The roll angle is positive when the left side
of the crane is higher than the right side. In the image
shown, which is a view on the front of the crane, the roll
angle is negative.
Side Load – Any external force applied either to the
boom or load in a horizontal direction.
Slope: Generalised angle of the ground measured in
degrees.
Tilt: Generalised combination of pitch and roll.
Work Areas – Area measured in an arc about the centre pivot as shown on the
Working Area diagram.
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