High Risk Work Licence - Slewing Mobile Crane C1 (100t)
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The Slewing Mobile Crane C1 licence is an Australian high risk work licence for operating slewing mobile cranes with a rated capacity above 20 tonnes and up to and including 100 tonnes. It suits crane operators, rigging crews and construction or heavy-industry workers who need to plan and perform lifts with larger mobile plant. Assessment combines knowledge questions, written calculations and a practical demonstration of crane operation and inspection. The knowledge component covers duty of care and the WHS framework, hazard and risk control, load charts and rated capacities, rigging and load estimation, set-up and ground conditions, operating and signalling, lifting plans and multi-crane work, powerline and environmental hazards, shutdown and maintenance records, and emergency response. Preparation works best in layers: learn the load-chart mathematics until it is routine, practise pre-start inspections against a checklist, and rehearse hand and whistle signals until they are automatic. Build practical hours under supervision and get feedback on boom configuration, radius control and stabiliser set-up. This material is independent study support and is not affiliated with any regulator or registered training organisation. Always confirm current requirements with the relevant WHS regulator and your training provider before booking.
What you'll study
About High Risk Work Licence - Slewing Mobile Crane C1 (100t) preparation
What does the C1 licence actually let me operate?
It covers slewing mobile cranes with a rated capacity above 20 tonnes and up to and including 100 tonnes. Non-slewing cranes, vehicle loading cranes and cranes above 100 tonnes sit under different classes, so check which class a specific machine falls into before you operate it.
What is the assessment format?
Expect a knowledge test of multiple-choice and short written questions, calculation items using load charts, and a practical assessment where you inspect, set up and operate a crane to a stated task. Your registered training organisation sets the exact structure, so confirm the details with them.
How long is the course and the exam?
Course length and assessment duration vary by provider and by your prior experience. The official body and your training provider publish current figures. Do not rely on second-hand numbers; confirm the schedule when you enrol.
What score do I need to pass, and what does it cost?
Passing scores and fees are set externally and change over time. The relevant WHS regulator and your training provider publish the current figures. Ask for the fee schedule in writing, including any assessment or licence application charges.
How hard is the C1 assessment?
Most candidates find the practical side manageable with real operating hours, and the written load-chart work the hardest part. Difficulty rises if you have not practised reading radius, boom length and configuration together. Consistent practice on realistic chart problems matters more than memorising answers.
What are the most common failure points?
Candidates commonly lose marks on load-chart calculations that ignore configuration or deduction factors, incomplete pre-start inspections, poor stabiliser set-up on soft ground, unclear signals, and weak lifting plans. Sloppy exclusion zones and powerline approach planning also show up regularly.
Can I retake if I do not pass?
Retake arrangements depend on the registered training organisation and the regulator's rules. Ask your provider about reassessment timing and any additional fee before you sit the first attempt, so there are no surprises.
How long is the licence valid?
High risk work licences are time-limited and renewal usually requires an application before expiry. The regulator publishes current validity periods and renewal steps. Diarise your expiry date and start the renewal process early rather than waiting for a reminder.
In what order should I study?
Start with legislation and hazard control, then move to load charts and rigging mathematics, because later topics build on them. Follow with inspection and set-up, then operating and signalling, lifting plans, environmental hazards, shutdown, and emergency response. Finish with timed calculation practice and a full practical walkthrough.
Do I need experience before enrolling?
Requirements vary, and many providers expect relevant industry experience or prior rigging knowledge. Check the entry requirements with your provider and the regulator before booking, and confirm what evidence of experience you need to supply.