High Risk Work Licence - Portal Boom Crane (CP) flashcards
High Risk Work Licence - Portal Boom Crane (CP) · 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.
- Rated capacity
- The maximum load a crane may lift at a specified radius and configuration, including rigging, as stated on the load chart.
- Load moment
- The product of load and radius; it determines the stability and structural limit used to derive the crane's load chart.
- Radius
- The horizontal distance from the crane's slewing centre to the centre of gravity of the load, used to read the load chart.
- Sling angle factor
- A multiplier applied to sling tension based on the included angle between legs; tension increases as the angle widens.
- Centre of gravity
- The point where the load's weight is concentrated; it must be directly below the hook to prevent swing and unequal loading.
- Pre-operational inspection
- A documented check of the crane before each shift, covering structure, wire rope, hook, brakes, limits, and safety devices.
- Outrigger setup
- Fully extending outriggers on stable, compacted ground with spreader mats as needed, then levelling the crane before lifting.
- Exclusion zone
- A defined area beneath and around the load path where no person may stand, to prevent injury from falling loads or swing.
- Hierarchy of control
- The ranked approach to risk control: eliminate, substitute, engineer, administrate, then PPE as the last resort.
- ALARP
- As low as reasonably practicable; the principle that risks must be reduced until further control is grossly disproportionate to benefit.
- PCBU
- Person conducting a business or undertaking; has the primary duty to ensure health and safety so far as reasonably practicable.
- Notifiable incident
- A serious incident such as crane collapse, uncontrolled load drop, or powerline contact that must be reported to the regulator.
- SWMS
- Safe work method statement; a site-specific document describing hazards, controls, and sequence for high-risk construction work.
- Standard hand signals
- Uniform signals per AS 2550.1 used by a designated signal person to direct hoist, lower, slew, stop, and emergency stop.
- Emergency stop signal
- Any person may give a stop signal; the operator must stop immediately and hold the load safely until directed.
- Tag line
- A rope used to control load rotation without a person standing under the load; never wrap around hands or stand in the bight.
- Load swing control
- Using smooth accelerations, anticipating slew, and leading the load to prevent dangerous pendulum motion during travel or slewing.
- Blind lift
- A lift where the operator cannot see the load or path; requires a designated spotter and continuous communication.
- Wire rope rejection
- Criteria such as broken wires, kinks, corrosion, or diameter reduction that require the rope to be removed from service.
- Hook latch
- A safety device that closes the hook throat to prevent slings from slipping out; must be present and functional.
- Limit switch
- A safety device that stops hoist, lower, or slew motion at a set point; must be tested during pre-start inspection.
- Overload protection
- A system that warns or prevents lifting beyond rated capacity; must be functional and not overridden.
- Dynamic risk assessment
- Continuous evaluation of changing conditions during the lift, with authority to stop work if risk increases.
- Ground bearing pressure
- The load per unit area exerted by outriggers or rails on the ground; must be checked to prevent settlement or collapse.
- Load chart
- A manufacturer-supplied table or graph showing rated capacity for each radius, boom length, and configuration.
- Mode factor
- A multiplier from sling standards applied to the sling's WLL based on the number of legs and included angle.
- Shock loading
- A sudden dynamic force from jerking or dropping a load, which can exceed the static weight and overload the crane.
- Emergency lowering
- A manufacturer-specified procedure to lower a suspended load safely after power failure or control malfunction.
- Post-incident inspection
- A thorough examination by a competent person after any incident, required before the crane returns to service.
- Defect tagging
- Attaching a clear tag to a defective crane or component to prevent use until repaired and re-inspected.
- Operator logbook
- A record of crane hours, lifts, and anomalies used to support maintenance scheduling and defect tracking.
- Major inspection
- A comprehensive structural and mechanical examination at intervals (e.g., 10 years) set by the manufacturer or standard.