High Risk Work Licence - Self-Erecting Tower Crane (CS) flashcards
High Risk Work Licence - Self-Erecting Tower Crane (CS) · 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.
- PCBU
- Person Conducting a Business or Undertaking; has the primary duty of care under WHS law to ensure health and safety so far as reasonably practicable, including for crane operations.
- High risk work licence
- A licence required to perform high risk work such as operating a self-erecting tower crane; must be carried or available and renewed before expiry.
- SWMS
- Safe Work Method Statement; a document that sets out high risk construction work activities, hazards, and control measures, required under WHS regulations.
- Notifiable incident
- A death, serious injury, or dangerous incident that must be reported to the regulator immediately; the site must not be disturbed except to assist or make safe.
- Hierarchy of control
- The order of risk controls: eliminate, substitute, isolate, engineering, administrative, then PPE; higher-order controls are preferred.
- Exclusion zone
- A defined area around the crane and lifting operation where unauthorized personnel are prohibited; size determined by load radius, fall zone, and site conditions.
- Risk assessment
- A systematic process of identifying hazards, evaluating likelihood and consequence, and implementing controls; must be reviewed when conditions change.
- Emergency stop signal
- One long whistle or a hand signal with arm extended horizontally and moving side to side; anyone may give it, and the operator must stop immediately.
- Hoist signal
- Two short whistle blasts or a hand signal with forearm vertical and finger pointing up; directs the operator to raise the load.
- Radio communication protocol
- Clear, concise messages identifying the crane and load, with read-back confirmation for critical moves; stop work if communication fails.
- Load moment
- The product of load and radius; it must not exceed the crane's rated load moment, which determines stability and tipping.
- Slew centre
- The vertical axis around which the crane's upper structure rotates; radius is measured from this centre to the load's centre of gravity.
- Counterweight
- A mass on the counter-jib that provides a resisting moment to balance the load moment and maintain crane stability.
- Rated capacity
- The maximum load a crane is designed to lift at a specified radius and configuration, as shown on the load chart.
- Ground bearing pressure
- The pressure exerted by the crane's foundation on the ground; must be assessed by a competent person to prevent settlement or collapse.
- Outrigger
- A stabilising arm extended from the crane base to increase the support base; must be fully extended and supported on stable material.
- Rail track alignment
- For rail-mounted cranes, the track must be laid to correct gauge and alignment on a properly prepared subgrade with drainage.
- Climbing operation
- The process of raising the crane mast using its own hydraulic system; must be done within wind limits and by competent persons.
- Erection sequence
- The documented order of assembling crane components; dismantling follows the reverse sequence, with controlled lowering and securing for transport.
- Load chart
- A table or graph showing the maximum safe lifting capacity for various radii and configurations; must be available and used for every lift.
- Total load
- The sum of the load weight, rigging, lifting accessories, and hook block; must be subtracted from the rated capacity.
- Load estimation
- Determining load weight by calculating volume times density or using a scale; never guess, and verify when unknown.
- Dynamic load
- Additional load due to wind, acceleration, or deceleration; increases the effective load and may require reducing capacity.
- Pre-operational inspection
- A daily check before first use, covering structure, ropes, hooks, limit switches, brakes, and safety devices; defects must be reported and rectified.
- Defect reporting
- The process of reporting any safety-related defect immediately; the crane must be tagged out and not used until repaired.
- Maintenance schedule
- The manufacturer's specified intervals and tasks for servicing the crane; must be followed by competent persons and records kept.
- Working load limit
- The maximum load a lifting accessory is designed to carry; must not be exceeded and is affected by sling angle.
- Sling angle factor
- A multiplier applied to the sling's capacity based on its angle from horizontal; capacity decreases as the angle decreases.
- Tag line
- A rope attached to a load to control rotation and movement during lifting; helps keep the load within the exclusion zone.
- Slewing
- The rotation of the crane's upper structure around the slew centre; must be controlled to avoid load swing and contact with structures.
- Out-of-service wind
- The wind speed at which the crane must be placed in a specified configuration (e.g., slewing free) to prevent damage; specified by the manufacturer.
- Load placement
- Landing the load on a stable surface and ensuring it is fully supported before releasing the rigging; never leave a suspended load unattended.