Rigging course details
PART 1
Determining load weight - introduction
- Understand why it’s important to know the weight of a load
- Choose acceptable methods to obtain load weight
- Avoid unacceptable methods to obtain load weight
- Tips for easier and safer load weight calculations
PART 2
Rigging gear general handling and safety
- Methods of handling rigging gear
- Safe practice in rigging gear selection
- Safe work practices during the rigging process
- Identify hazards to rigging gear
- Prevent rigging gear damage during use
- Handling hoist and "below the hook" equipment
Rigging gear inspection
- Mandatory certification of rigging equipment
- Types of inspections
- Frequency of inspections
- Criteria for inspection
- Rejection criteria
PART 3
Determining load weight by calculations
- Calculate area and volume of basic objects
- Understand and use the standard weight table
- Calculate weight of basic and complex shapes by area and volume
Selection and use of rigging hardware
- Identify usage limitations for rigging hardware
- Identify correct installation procedures of rigging hardware
- Determine rated load of rigging hardware in various configurations
Selection and use of slings
- Limitations of slings
- Correct methods of attaching slings to hook
- Identify incorrect / unsafe sling-hook attachments
- Understand the importance of sling eye length to hook diameter
- What is included sling angle?
Sling angle stress and rigging methods
- Understand and define sling angle stress
- Why sling angle stress must be factored in calculations
- Use the sling angle stress factor table
- Calculate the sling angle stress
- Determine sling length and minimum rated capacity for lifts
- Understand different methods of top and bottom lift
Distribution of load weight
- Understand center of gravity, moments and balance point
- Importance of CG location
- Calculate CG location
- Know what determines weight distribution to attachment points
- Importance of weight distribution to attachment points
- Understand and apply “Two leg carries load” rule
- Calculate weight distributed to attachment points
Diameter to diameter ratio
- Explain meaning of “D” to “d” ratio (D/d)
- Determine a sling’s D/d ratio
- Use D/d to determine sling efficiency
- Use efficiency to calculate the sling’s rated load
- D/d ratio for chain and synthetic slings