High Risk Work Licence - Slewing Mobile Crane C6 (60t) case studies
High Risk Work Licence - Slewing Mobile Crane C6 (60t) · Put your knowledge to work in context.
The C6 slewing mobile crane licence is an Australian high risk work licence for operating slewing mobile cranes with a maximum rated capacity above 20 tonnes and up to 60 tonnes. It suits experienced doggers and riggers moving into crane operation, and operators who already hold a lower-capacity licence and need to work with larger plant. The High Risk Work Licence - Slewing Mobile Crane C6 (60t) case studies are 5 cases and about 3,243 words.
1Outrigger Setback on a Surcharged Pad
A 60 t slew crane is set up on a compacted gravel hardstand beside a new warehouse to lift a 9.2 t packaged air-handling unit onto a roof curb 22 m away. The crane is configured with 18 m of boom, a 12 m fly jib at 15 degrees, and full outriggers.
727 words, about 4 min2Two-Crane Tandem Lift of an Off-Centre Load
Two cranes are to tandem-lift a 14 t prefabricated steel truss, 18 m long, from a laydown area onto bearing pads. Crane A is a 60 t slew crane at 9 m radius; Crane B is a 40 t slew crane at 8 m radius.
715 words, about 4 min3Minimum Approach Distance to an Unearthed 11 kV Line
A 60 t slew crane is lifting formwork panels onto a second-storey slab. An 11 kV overhead line on wooden poles runs along the site boundary.
627 words, about 3 min4Load Chart Selection for a Fly Jib Pick at Height
You are asked to lift a 3.8 t steel beam onto a plant room roof 24 m above the crane. The crane is a 60 t slew crane with 40 m of main boom and a 10 m fly jib offset at 30 degrees.
623 words, about 3 min5Defect Found at the Pre-Start Inspection
At the pre-start inspection on a cold morning, you find a slow hydraulic leak at a boom cylinder seal, a frayed section on the hoist rope about 1.5 m from the dead end, and a cracked weld on a step bracket. The leak leaves a small drip every few minutes.
551 words, about 3 min