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Módulo 9 de 10 150m 10 exam Qs

Cranes, Rigging, and Motor Vehicles

Crane operation and signals, rigging hardware inspection, sling angles, motor vehicle safety on construction sites, and heavy equipment operation.

  • Apply crane capacity chart requirements and signal person procedures
  • Inspect rigging hardware and calculate sling load factors
  • Implement motor vehicle safety programs for construction sites
  • Describe qualification requirements for crane operators and riggers

Lección 1

Crane Safety - Detailed

OSHA's crane standard (29 CFR 1926 Subpart CC) was comprehensively updated in 2010. It requires certified operators, qualified riggers, and qualified signal persons.

Subpart CC
OSHA Crane Standard
10 ft
Power Line Clearance (up to 50kV)
75%
Max Capacity for Critical Lifts
**Crane operator certification requirements:** - Must be certified by an accredited testing organization - Must pass both written and practical exams - Certification is for specific crane types - Employer must also evaluate the operator's ability on the specific equipment **Daily inspection requirements:** - Before each shift, the operator must inspect the crane - Monthly thorough inspections documented - Annual inspection by a qualified person - Immediately after any incident or unusual event **Power line safety procedures:**
1
Survey Site
Identify all power lines before crane setup
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2
Calculate Clearance
10 ft min for lines up to 50kV
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3
Contact Utility
Request de-energizing or insulation if clearance cannot be maintained
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4
Assign Spotter
Dedicated observer monitors line clearance during lifts

Assembly/disassembly director: A qualified person designated as the A/D director must be present and directly supervise the assembly and disassembly of all cranes. The A/D director has authority to halt operations if safe conditions are not met.

Crane certification types (NCCCO): The NCCCO provides separate certifications for mobile cranes, tower cranes, overhead cranes, and lattice boom cranes. A certification for one crane type does not qualify the operator to run a different crane type. The employer must also conduct a site-specific practical evaluation.

Crane capacity charts:

Every crane has a capacity chart specific to that make, model, and configuration. The chart shows the maximum rated capacity at various combinations of:

  • Boom length (longer boom = less capacity)
  • Radius (distance from the crane center to the load - greater radius = less capacity)
  • Boom angle (higher angle generally allows more capacity within limits)
  • Configuration (whether outriggers are deployed or not)

The competent person must verify the lift plan against the actual capacity chart for the specific crane configuration before each critical lift. Lifts exceeding 75% of the crane's rated capacity at the working radius are considered critical lifts and require additional pre-planning.

Pre-lift meeting:

For lifts exceeding 75% of capacity (critical lifts) or involving multiple cranes, a formal pre-lift meeting is required. Attendees include the crane operator, rigger, signal person, lift director, and any other workers involved. The meeting covers the lift plan, hazards, signal communication, abort criteria, and emergency procedures.

Key Takeaway

Crane operators must be certified by accredited testing organizations and evaluated by the employer on specific equipment. Daily inspections before each shift, monthly documented inspections, and annual qualified person inspections are all required. Maintain 10-foot clearance from power lines up to 50kV. Lifts exceeding 75% of rated capacity are critical lifts requiring a pre-lift meeting and formal lift plan.
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