JIBS
To determine the jib capacities of the crane with all boom lengths, use the following procedure:
1.
Determine weight of load to be lifted.
2.
Determine weight of slings and rigging hardware.
3.
Determine weight of hook block.
4.
Determine capacity deductions.
5.
Calculate weight of lifted load.
6.
Determine jib type and length, jib offset, main boom angle.
7.
Select correct jib load chart (stowaway or sidestow).
8.
Compare load weight with chart rated capacity for the jib length, boom angle,
and jib offset (if applicable).
In the following example the crane is set up as follows:
1.
On outriggers.
2.
Side stow jib erected at 30° offset.
3.
Auxiliary boom head sheave erected but not used.
4.
Hook block off the main head but not used.
5.
Boom angle of 61°.
At first glance it appears that the 2,350 lb. object to be lifted is well within the capacity of
the jib however after making the deductions for the erected and unused equipment and
figuring the additional weight for slings and the hook & ball this lift CANNOT be made.
NOTE:
Deductions for erected but unused equipment can either be deducted from
the capacity OR added to the weight to be lifted. In this case we will add the weight
to the load.
105
P/N 12261-319 REVISED: August 2012
Summary of Contents for RT200-1
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Page 47: ...Safety 46 P N 12261 319 REVISED August 2012 Courtesy of Crane Market...
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Page 124: ...Lubrication Chart Maintenance 123 P N 12261 319 REVISED August 2012 Courtesy of Crane Market...
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Page 211: ...Notes Courtesy of Crane Market...
