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Load Rating Chart Interpretation
In the following pages are examples of a load chart, these example charts may differ from
the chart supplied with your crane. Always use the load rating chart supplied with the crane
to interpret the conditions and limitations that exist when making a lift with the crane. The
determining factors are lifted load, radius, boom angle, working position, hoist line reeving,
tire pressure, travel data, use of a jib, and any other special conditions that exist, such as
wind velocity, soil conditions, etc.
DEFINITIONS OF LOAD CHART TERMS
Lifted Load:
The lifted load is the total weight of all the items suspended on the wire rope.
Hook block
750 lbs.
Slings
215 lbs.
Object Lifted
19,000 lbs.
Lifted Load
19,965 lbs.
Radius:
The radius is the horizontal distance from the center of the swing bearing to the center of
the lifted load.
Deflection of the crane boom will tend to increase the radius as the load is lifted.
To minimize this, use the combinations of boom angle and length shown in the
load rating chart. Do not allow the radius to exceed that given for the rated load.
Boom Angle:
The boom angle is the angle of the boom measured from horizontal. Use the angles shown
to approximate the loaded radius, but do not rely solely on a boom angle indicator to
determine radius. Always measure the actual radius when determining main boom capacities.
Front and 360°:
The “crane working position” diagram is a view looking straight down on the crane with the
upperstructure and the boom removed.
“Front” when the crane is on outriggers is the area inside the are bounded by lines from the
centerline of rotation through the front outrigger vertical jack cylinders.
“St. over Front” when operating on tires means the boom and load must be positioned
straight to the front of crane and not swung to right or left.
360° means the load can be swung to any position around the crane.
Deducts:
The “on outriggers” rated capacities are for lifting over the main boom point. Jibs, if so
equipped, are in the stowed position. Any specialty items attached to the boom head
Operating Instructions
100
P/N 12261-319 REVISED: August 2012
Содержание RT200-1
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Страница 199: ...1 Proximity Sensor Outrigger Position Service Parts 198 P N 12261 319 REVISED August 2012 Courtesy of Crane Market...
Страница 207: ...Torque Specs SAE Metric Appendix 206 P N 12261 319 REVISED August 2012 Courtesy of Crane Market...
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