Broderson IC-400-3B, Operation And Maintenance Manual

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CRANE CAPACITY CHART, DEFINITIONS, AND RULES
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The load radius is the horizontal distance from the centerline of boom rotation (the center of
the turntable when it is level), to the vertical load line with the load suspended. Because of
deflections of the boom and carrier, the load radius increases when a load is hoisted from
its resting place. The load radius may be measured with a measuring tape. If the desired
load radius falls between two load radii on the chart, use the load radius with the lower
capacity. Interpolating between the numbers is not recommended.
Load capacity ratings on this equipment are given on the basis that operations are to be
conducted on firm and level terrain and in a safe environment. A level sensor and a screen
on the
Dash Display
have been provided to aid the operator in leveling the crane. These
capacity ratings are to be reduced in proportion to any deviation from the prescribed
conditions. Any unfavorable environmental condition, such as soft, sloping or uneven
terrain, high wind, or hazardous surroundings constitutes a deviation.
The main boom capacities are given in relation to the load radius at which the load is being
handled. Boom extension capacities depend on the boom angle, the boom extension
angle, and load radius. The capacities shown on the capacity chart are the maximum
allowable at the indicated radius. The greatest load that may be handled by the BMC IC-
400 is 50,000 pounds (22,680 kg), but only at an 8-foot (2.4 m) radius, on outriggers. All
load ratings, operating radii, work areas, boom extension offsets, and outrigger conditions
are shown on the capacity chart. A laminated chart is attached near the operator's seat, as
well as in the literature compartment. An electronic version of the chart may also be
accessed through the
Dash Display.
These charts are for the express purpose of informing
the operator when a load can or cannot be safely handled.
The capacities shown in the 360° ROTATION and ON RUBBER 360° columns of the
capacity chart apply to the entire 360 degree rotation of the boom. The capacities are
maximum allowable at the indicated radius. The capacities ON OUTRIGGERS OVER
FRONT and ON RUBBER FRONT are limited to the work area sectors shown on the chart.
Note that the ON RUBBER 360° capacities are much less than the ON RUBBER FRONT
capacities. The least stable position of the boom is over the sides of the crane. Use great
care when swinging a load from the front or rear of the crane toward the sides of the crane.
The load must be known in order to assure that the crane will not tip.
NOTICE
Under certain load conditions, torsion induced in the chassis can cause it to twist.
This may result in an opposite-side outrigger or tire lifting free from the supporting
surface. This is most likely to occur when the boom is positioned over one corner of
the machine. The condition does not indicate a loss of stability when working within
the limits of the capacity chart. Provided the crane capacity has not been exceeded,
operation may continue without restriction.