Red Seal Mobile Crane Operator case studies
Red Seal Mobile Crane Operator · Put your knowledge to work in context.
The Red Seal endorsement for Mobile Crane Operator (trade 339A) is an interprovincial certification that tells employers you have met a common Canadian standard for safely planning and executing lifts with mobile cranes. It is intended for working operators who have completed an apprenticeship or accumulated equivalent hours and want their skills recognized across provinces. The exam is multiple choice and samples the full trade: safety and regulatory compliance, rigging and lift planning, setup and ground conditions, inspection and maintenance, operation and load handling, assembly and transport, signalling, and load charts and documentation. Load charts and lift planning carry real weight, so chart reading and capacity calculations deserve heavy practice. The Red Seal Mobile Crane Operator case studies are 5 cases and about 2,190 words.
1Outrigger Setup Beside an Unshored Excavation
A 100-tonne all-terrain crane is set up to lift a 9,500 kg chiller at an 18 m radius with 40 m of main boom. The load chart gives a maximum right-rear outrigger reaction of 520 kN for this configuration.
482 words, about 2 min2Two-Leg Bridle Lift with an Offset Centre of Gravity
A steel skid weighing 8,600 kg is 4.8 m long and 2.2 m wide. It has two lifting lugs on the centreline, 3.6 m apart.
457 words, about 2 min3Pick-and-Carry Across a Cross-Slope with Wind
A 55-tonne rough-terrain crane is to pick and carry a 5,600 kg precast vault from a storage area to an excavation 60 m away. The crane is on 26.5R25 tires at 690 kPa.
432 words, about 2 min4Boom-Hoist Wire Rope Inspection Findings
During a pre-operational inspection, a 20 mm 6×37 IWRC boom-hoist wire rope is found to measure 18.9 mm at a low point. Over one 120 mm lay length, the inspector counts nine broken wires, four of them in a single strand.
408 words, about 2 min5Conflicting Signals on a Blind Roof Lift
An operator is setting a 4,200 kg air-handling unit on a roof 18 m above grade. The operator cannot see the load or the landing area from the cab.
411 words, about 2 min