- Define critical lift criteria and required documentation
- Describe lift plan development and content requirements
- Explain tandem lift procedures and multi-crane coordination
- Identify pick-and-carry operation requirements and operator authority
Leçon 1
Critical Lift Criteria & Documentation
What Defines a Critical Lift?
A critical lift is any lift that meets one or more specific criteria requiring a written lift plan and heightened safety measures. In Canadian practice, a lift is typically classified as critical when:
- The load exceeds 75-80% of the crane's rated capacity at the working radius
- Personnel are being hoisted
- The lift occurs over occupied areas or live utilities
- Two or more cranes are used simultaneously (tandem lift)
- The load is irreplaceable, hazardous, or of high value
- Environmental conditions create elevated risk (high wind, congested site)
75-80%
Critical Lift Capacity Threshold
Written Plan
Required Documentation
Pre-Lift Meeting
Mandatory Before Execution
Required Documentation
A critical lift plan must be prepared in writing and must include:
- Exact load weight verified by reliable means
- Crane selection with capacity verification at the working radius
- Rigging plan detailing all slings, hardware, and hitch configurations
- Site plan showing crane position, load path, and landing zone
- Hazard identification and mitigation measures
- Personnel assignments and responsibilities
- Communication plan including backup methods
- Approval signatures from responsible persons
Pre-Lift Meeting
Every critical lift requires a pre-lift meeting (toolbox talk) where the plan is reviewed with all personnel. Everyone must understand their role, the communication method, and the emergency procedures.
Key Takeaway
A critical lift exceeds 75-80% of rated capacity or involves special hazards and requires a written lift plan. The plan must cover load weight, crane configuration, rigging, hazards, and be reviewed with all personnel before execution.