2-10
CRANE CAPACITY CHART
Before lifting loads, the operator must read the capacity placard and adhere to the load
capacities and radii of handling given. The information provided on this placard is based
on stability, structural strength and hydraulic capacity.
To operate the crane safely, the operator must know the weight of the load and handling
devices and the radius of the lifting operation. The best way to find the weight is to weigh
it with a scale or load indicator that has been recently tested. The person responsible for
the lift must be sure that the load does not exceed the crane ratings at any radius at
which the load may be during the entire lifting operation. The weights of the hooks,
blocks, downhaul weights, slings, and other handling devices must be added with the
load.
The load radius is the horizontal distance from the centerline of boom rotation (the
center of the unloaded turntable), to the vertical load line with the load suspended. The
load radius may be measured with a measuring tape.
Load capacity ratings on this equipment are given on the basis that operations are to be
conducted on firm and level terrain with outriggers extended fully and firmly to the
ground. These capacity ratings are reduced in proportion to the deviation from the
prescribed conditions. Any unfavorable environmental condition, such as soft, sloping or
uneven terrain, constitutes a deviation.
The main boom capacities are given in direct relation to the radius at which the load is
being handled. 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-20-1J is
5,000 pounds (2268 kg), but only at a 4 foot (1.2 m) radius and on outriggers. All
variances of loads and radii of handling are shown on the crane capacity chart. A metal
chart is attached near the operator's seat and a laminated chart is included in the
literature compartment for the express purpose of informing the operator when a load
can or cannot be safely handled.
The boom on the IC-20 rotates 90 degrees from straight over the front right tire to 90
degrees over the left side.
The capacity chart on the IC-20-1J is divided between FRONT ON RUBBER, FRONT ON
OUTRIGGERS, LEFT SIDE ON RUBBER, LEFT SIDE ON OUTRIGGERS and 7-FT (2.1
m) JIB ON RUBBER OR OUTRIGGERS. The least stable operating position of the
boom is over the left side of the crane. Use great care when swinging a load. The load
must be known to assure that the crane will not tip.
The following page shows a copy of the capacity chart for the IC-20-1J.
Summary of Contents for IC-20-1J
Page 6: ...1 2 DIMENSIONS AND ORIENTATION IC 20 1J Courtesy of Crane Market...
Page 7: ...1 3 TURNING DIMENSIONS Courtesy of Crane Market...
Page 25: ...2 11 Courtesy of Crane Market...
Page 26: ...2 12 Courtesy of Crane Market...
Page 36: ...Courtesy of Crane Market...
Page 44: ...3 8 IC 20 LUBRICATION CHART Courtesy of Crane Market...
Page 48: ...3 12 JIC SCHEMATIC Courtesy of Crane Market...
Page 50: ...3 14 STEERING SYSTEM Courtesy of Crane Market...
Page 52: ...3 16 IC 20 PROPULSION SYSTEM Courtesy of Crane Market...
Page 62: ...Courtesy of Crane Market...
Page 63: ...Powered by TCPDF www tcpdf org Courtesy of Crane Market...