High Risk Work Licence - Slewing Mobile Crane C1 (100t) flashcards
High Risk Work Licence - Slewing Mobile Crane C1 (100t) · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- C1 licence capacity range
- A C1 high risk work licence covers slewing mobile cranes with a rated capacity greater than 20 tonnes and up to and including 100 tonnes.
- Primary duty of care
- A PCBU must ensure, so far as is reasonably practicable, the health and safety of workers and others affected by the business or undertaking.
- Hierarchy of control order
- Eliminate the risk, then substitute, isolate, engineer, apply administrative controls, and use personal protective equipment last.
- Rated capacity definition
- The maximum load a crane may lift in a specific configuration, being the lesser of the structural limit and the stability limit at that radius.
- Radius measurement point
- Radius is the horizontal distance from the crane's centre of rotation to the vertical line through the load's centre of gravity.
- Sling angle tension rule
- As the angle between sling legs and the horizontal decreases, tension rises; two legs at 30 degrees each carry about the full load.
- Centre of gravity effect
- If the centre of gravity is offset from the hook, the load tilts, sling tensions become unequal and the load may shift during the lift.
- Ground bearing pressure check
- Outrigger load must be compared with the ground's capacity; backfill, trenches, drains and pits can collapse under outrigger pressure.
- Anti-two-block device
- A safety device that prevents the hook block from contacting the boom tip, which could break wire rope or damage the boom.
- Load moment indicator
- An instrument that displays radius, boom angle, load and percentage of rated capacity, and alarms or stops operation when capacity is approached.
- Emergency stop signal
- A long whistle blast or the standard emergency hand signal means stop immediately; anyone may give it, not only the signal person.
- Lost communication rule
- If the operator loses sight of the load or contact with the signal person, the operator stops the movement and holds the load until communication resumes.
- Multi-crane lift rating
- Each crane in a multi-crane lift should be rated for at least 75 per cent of its load share unless an engineer justifies otherwise.
- Personnel lifting condition
- Lifting people is permitted only when it is the least risk option, using a purpose-built box, a documented plan and harness anchor points.
- Exclusion zone basis
- The zone is sized from the slew path, load radius, potential fall or drift, and powerline clearance, then barricaded and signed.
- Powerline contact response
- Stay in the cab, warn others away and do not touch the crane; jump clear only as a last resort with feet together.
- Wind limit source
- The maximum permissible wind speed is stated in the crane's load chart or manual and is measured at the boom or load, not at ground level.
- Shutdown parking steps
- Land the load, lower and pin the boom, retract and pin outriggers, apply the parking brake, secure the hook block and isolate the battery.
- Defect tagging rule
- A crane with a defect affecting safe operation must be tagged out, recorded and repaired by a competent person before it is returned to service.
- Notifiable incident report
- The regulator must be notified immediately by the fastest means after a death, serious injury or dangerous incident, with a written report to follow.
- Sling working load limit
- The WLL is the maximum mass a sling or fitting may carry in a specified configuration; it must be tagged and never exceeded.
- Boom length chart effect
- Increasing boom length generally reduces rated capacity at the same radius because of structural and deflection limits.
- Outrigger pad purpose
- Pads spread outrigger load over a larger area, reducing ground bearing pressure and the risk of punch-through or settlement.
- Signal person authority
- Only the designated signal person directs the operator, except that anyone may give a stop signal at any time.
- Lifting plan contents
- The plan records load mass and centre of gravity, crane configuration, radius, capacity used, rigging, ground conditions, roles and controls.
- Competent person meaning
- A person with training, qualification or experience giving the knowledge and skills to perform the specific task safely.
- Consultation duty
- The PCBU must consult workers and health and safety representatives when identifying hazards and deciding controls that affect them.
- Near miss reporting
- A near miss is an incident without injury that must be reported internally so causes are corrected before a serious incident occurs.
- Pick-and-carry rating
- Travelling with a load uses a separate, lower capacity chart than stationary lifting and requires firm level ground and a planned route.
- Tag line use rule
- Tag lines control load rotation and swing; they must be long enough to keep people clear and never wrapped around hands or body.
- Daily inspection record
- The pre-start inspection result must be recorded and signed; defects are reported and the crane tagged out until repaired.
- Crane levelling requirement
- The crane must be levelled per the manufacturer's procedure before lifting, because out-of-level setup reduces capacity and loads the boom unevenly.