Stability of truck mounted lifting systems calculation

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SUMMARY

The discussion centers on the calculation of stability for truck-mounted cranes, specifically referencing the "Australian Code of Practice for Crane Installation on Truck," part of the AS 1418 standard. The user, Guideon, seeks clarification on the center of gravity (C.O.G) positioning and its implications during crane operation, particularly when the boom is extended. Key points include the relationship between the crane's C.O.G and the stabilizer line, the method for determining the C.O.G at maximum outreach, and the significance of the parameter F (3.45 m) in calculating tipping moments.

PREREQUISITES
  • Understanding of crane stability principles
  • Familiarity with the Australian AS 1418 standard
  • Knowledge of center of gravity calculations
  • Basic concepts of tipping moments and load distribution
NEXT STEPS
  • Research the Australian AS 1418 standard for crane operations
  • Learn about calculating the center of gravity for mobile cranes
  • Study the effects of boom extension on crane stability
  • Examine methods for determining tipping moments in crane operations
USEFUL FOR

Engineers, crane operators, safety inspectors, and anyone involved in the design and operation of truck-mounted lifting systems will benefit from this discussion.

guideonl
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Hi everyone,
I was looking for a std to calculate stability of truck mounted crane. Recently I found an australian std "australian code of practice for crane installation on truck" (I think it is a part of 1418 au std), and I found it simple and practical. But, when I tried to solve the example given at the std I realized that I missunderstand several things, I hope you can help me..
First, in appendix 5 (page 13):
-from the figure, the crane C.O.G coincides with the stabilizer line. Is it a particular case, or a design requirement when the boom is perpendicular to the tipping line?
-if not, how can I find the C.O.G of the crane when the boom is in it's max outreach? (I only found the C.O.G of crane - Fassi- in a stowed possition).
-why the crane rotation axis is a little bit shifted from the truck longitudinal axis (it is not on the truck axis).
Second, the equations under the figure (page 13), contain the F parameter (=3.45 m) to determine the tipping moment and the tipping load, but there is no F designated at the figure. I guess that this should be the distance between the tipping line and the S.W.L , but I am not sure, it could be also a virtual dimension..

Thanks, Guideon


www.infrastructure.gov.au/roads/vehicle.../pdf/vsb_06_q.pdf[/URL]
 
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Sorry for the inopperative link. I hope the new one attached will work..
http://www.infrastructure.gov.au/roads/vehicle_regulation/bulletin/pdf/vsb_06_q.pdf
 
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