High Risk Work Licence - Vehicle Loading Crane (CV) flashcards
High Risk Work Licence - Vehicle Loading Crane (CV) · Build recall with a focused review session.
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- Rated capacity
- The maximum load mass the crane may lift at a specified radius and boom configuration, as stated by the manufacturer's load chart, with rigging mass deducted.
- Operating radius
- The horizontal distance from the crane's rotation centre to the load's centre of gravity; increasing radius reduces the crane's rated capacity.
- Net capacity calculation
- Gross chart capacity minus the combined mass of hook block, slings, spreader bars and attachments between the boom head and the load.
- Load chart
- Manufacturer-supplied table or graph giving rated capacity for each combination of radius, boom length and boom angle, assuming a level crane.
- Centre of gravity
- The point where the load's mass is balanced; an off-centre centre of gravity increases effective radius and can overload the crane.
- Lift plan
- A documented plan for a complex or near-capacity lift, covering load mass, radius, rigging, ground conditions, roles and emergency controls.
- Exclusion zone
- The area beneath and around the suspended load and slew path where personnel are prohibited, marked and controlled during lifting operations.
- High risk work licence
- The nationally recognised licence required to operate a vehicle loading crane, obtained after training and competency assessment.
- Outrigger deployment
- Extending outrigger beams and pads fully as specified by the manufacturer, since part extension can reduce capacity or invalidate the load chart.
- Outrigger pad sizing
- Selecting pads that spread the outrigger load so ground pressure stays below the ground's bearing capacity, preventing sinking or tipping.
- Levelling the crane
- Adjusting outriggers until the vehicle's level indicator shows the crane is level, because load charts assume a level crane.
- Pre-start inspection
- A check of tyres, outriggers, hydraulic hoses, wire rope, hook and safety devices before each operation to identify defects.
- Wire rope inspection
- Examining rope for broken wires, kinks, corrosion, crushing and wear; rope with defects beyond the discard criteria must be removed from service.
- Hook safety latch
- A spring-loaded device on the hook that closes the throat opening to prevent slings and rigging from slipping off during lifting.
- Rated capacity limiter
- A device that warns and prevents operation when the load or radius exceeds the crane's rated capacity; it must not be bypassed.
- Ground bearing capacity
- The maximum pressure the ground can support without failing; outrigger pressure must remain below this value to prevent settlement.
- Wheel chocking
- Placing chocks against the wheels to prevent the vehicle rolling, especially on sloping ground or before deploying outriggers.
- Slew area clearance
- Ensuring all personnel are clear of the crane's rotation path and crush zones before the boom or load is slewed.
- Shock loading
- A sudden load increase caused by jerking, snatching or dropping a load, which can exceed rated capacity and damage the crane.
- Tagline use
- A rope attached to the load and controlled by a dogger to guide rotation and prevent swinging without personnel touching the load.
- Side loading
- A horizontal force applied to the boom by dragging a load or slewing too fast, which can damage the boom and destabilise the vehicle.
- Travel with a load
- Moving the vehicle while carrying a load only when the manufacturer's travel chart and instructions permit, with the boom in the specified position.
- Hand signals
- Standardised signals used between the dogger and crane operator; if signals are unclear or lost, the operation stops.
- Suspended load rule
- Personnel must never stand under a suspended load or between the load and a fixed structure, because of the risk of crush injury.
- Load landing
- Lowering the load onto a stable surface, releasing rigging tension gradually, and confirming stability before removing slings.
- Boom stowing
- Retracting and lowering the boom to the manufacturer's travel position and engaging the boom lock before moving the vehicle.
- Outrigger retraction
- Fully retracting outrigger beams, raising pads, and securing pins and locking devices in the travel position after the lift.
- Crane shutdown sequence
- Following the manufacturer's shutdown steps, applying the park brake, isolating power and removing the key to prevent unauthorised use.
- Defect reporting
- Recording defects found during post-operational inspection and tagging out the crane if it is unsafe for further use.
- Crane logbook
- A record of pre-start checks, defects, loads lifted and incidents, used to track the crane's condition and maintenance history.
- Damaged sling tagging
- Removing damaged slings from service by tagging them clearly so they cannot be reused until inspected or discarded.
- Post-operational housekeeping
- Clearing debris, securing the area, stowing equipment and confirming all personnel are clear before leaving the site.
- Parking on a slope
- Parking the vehicle on firm level ground where possible; on a slope, chock the wheels and apply the park brake before leaving.