High Risk Work Licence - Slewing Mobile Crane C6 (60t)
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The C6 slewing mobile crane licence is an Australian high risk work licence for operating slewing mobile cranes with a maximum rated capacity above 20 tonnes and up to 60 tonnes. It suits experienced doggers and riggers moving into crane operation, and operators who already hold a lower-capacity licence and need to work with larger plant. Assessment combines knowledge questions with a practical observation, so you must show both theoretical understanding and hands-on control of the machine.
The knowledge component spans the ten domains below: the legislative and duty-of-care framework, hazard identification and risk control, crane types and load chart interpretation, rigging and load estimation, set-up and ground conditions, pre-operational inspection and defect reporting, lift planning including multi-crane lifts, communication and signalling, powerline and environmental hazards, and shutdown, securing and emergency procedures. Load charts, ground bearing and lift planning carry the most weight and are where most marks are won or lost.
Prepare by working through the load charts for the specific crane configurations you will be assessed on, practising plan-and-perform lifts under supervision, and drilling hand signals and two-way radio protocols until they are automatic. Read the regulator's candidate guide for the current assessment instrument, and confirm all administrative details with the issuing authority, which publishes the current figures on its website.
What you'll study
About High Risk Work Licence - Slewing Mobile Crane C6 (60t) preparation
What does the C6 licence actually let me operate?
A slewing mobile crane with a maximum rated capacity above 20 tonnes and not exceeding 60 tonnes. It does not cover cranes above 60 tonnes, non-slewing cranes, or other plant classes such as concrete placing booms, which have their own licence categories.
How is the assessment structured?
Typically a knowledge test covering the ten domains plus a practical performance assessment where an assessor observes you planning and completing lifts, inspecting the crane, interpreting load charts and responding to signals. The regulator publishes the current assessment instrument and conditions on its website.
How long is the exam and what is the pass mark?
These are set by the regulator and vary by jurisdiction, so check the official body's site for the current figure. Do not rely on numbers quoted in forums or training provider marketing, which are frequently out of date.
How difficult is it compared with the C2 or C1 licence?
The knowledge content is similar in structure but the load charts are more complex, with longer booms, heavier configurations and greater sensitivity to radius and ground pressure. Candidates who already read charts fluently usually find the transition manageable; newcomers to chart work often need substantial practice.
What if I fail a component?
Retake arrangements are set by the regulator and the registered training organisation, and fees and waiting periods differ between jurisdictions. Ask your provider in writing before you enrol so you know exactly what a reassessment costs and how soon you can attempt it.
How long is the licence valid?
Five years in most Australian jurisdictions, with renewal requiring evidence of recent work or reassessment. Confirm the current renewal requirements with your state or territory regulator, because conditions and evidence requirements change.
What should I study first?
Load charts and lift planning. They underpin rigging selection, set-up decisions and exclusion zones, so mastering them early makes the rest of the content easier. Then work through ground conditions and outrigger loading, followed by inspection, signalling and emergency procedures.
What are the most common failure points?
Misreading chart notes and deductions, ignoring configuration-specific capacity limits, poor ground assessment, and weak lift plans that omit hazards or contingency. In the practical, rushing the pre-start inspection and unclear communication with the dogger also cost marks.
Do I need prior rigging experience?
It is not always a formal prerequisite, but strong dogging and rigging knowledge makes the course far easier, since sling selection, load estimation and signal interpretation are assessed. Many candidates complete dogging first for this reason.
Can I use a calculator and reference material?
Calculator and chart use are normally permitted in the knowledge test, but the specific rules depend on the assessment instrument. Confirm permitted aids with your training provider before the day rather than assuming.