🔗 Rigging & Lifting Safety
Topic: Safe rigging and lifting practices Duration: 10-15 minutes Required: Only qualified riggers should rig loads
The Basics
Rigging is attaching a load to a crane or hoist. Done wrong, loads fall and people die.
Rigging Inspection
Before Every Use
- No damage - Cuts, abrasions, broken wires
- Proper capacity - Rated for the load
- Proper type - Right sling for the application
- Hardware - Shackles, hooks in good condition
Sling Types
Wire Rope Slings
- Best for: Heavy loads, rough conditions
- Inspect for: Broken wires, kinks, corrosion
- Capacity: Check manufacturer's chart
Chain Slings
- Best for: Very heavy loads, high temperatures
- Inspect for: Stretch, cracks, wear
- Capacity: Check manufacturer's chart
Synthetic Slings
- Best for: Delicate loads, chemical environments
- Inspect for: Cuts, abrasions, chemical damage
- Capacity: Check manufacturer's chart
Load Calculations
Sling Angle Matters
| Angle | Load per Leg | Example |
|---|---|---|
| 90° (vertical) | 50% of total | 2-leg sling: each leg = 50% |
| 60° | 58% of total | More stress on slings |
| 45° | 71% of total | Even more stress |
| 30° | 100% of total | Maximum stress |
Rule: Keep angles 60° or greater when possible.
Safe Practices
Rigging
- Center of gravity - Load balanced
- Proper attachment - Secure connection points
- Protect slings - Padding on sharp edges
- Multiple legs - Use enough legs for stability
- Tag lines - Control load movement
Lifting
- Test lift - Lift a few inches, check balance
- Clear path - Path clear of obstacles
- Personnel clear - No one under load
- Slow and smooth - No sudden movements
Common Mistakes
| Mistake | Consequence | Prevention |
|---|---|---|
| Wrong capacity | Sling failure | Check capacity chart |
| Sharp edges | Cut slings | Use padding |
| Wrong angle | Overload | Keep angles 60°+ |
| Damaged rigging | Failure | Inspect before use |
| Unbalanced load | Load shifts | Balance before lift |
Related Resources
- Crane Safety - Crane operation
- Equipment Inspection Checklist - Inspection procedures
Qualified Riggers Only
Only qualified riggers should rig loads. Improper rigging causes accidents and fatalities.