How to match the sling to the load?
Selecting the right chain sling is a key step that affects not only the safety of operations but also the durability of the equipment and efficiency of work. The sling must be suited to the type of load, its weight, the attachment method, and the working angle of the legs.
What to consider when selecting a sling?
1. Load weight
The sling must have a working load limit at least equal to (and preferably greater than) the load to be lifted. In the case of multi-leg slings, the effect of the sling leg angle on load capacity must also be taken into account.
2. Number of attachment points
- For simple loads, a single-leg sling is sufficient
- Larger and less stable elements require 2-, 3-, or 4-leg slings
- The more support points, the greater the lifting stability
3. Leg length
The length of the sling depends on the lifting height and load geometry. Legs that are too short or too long can negatively affect the lifting angle and overall safety.
4. Sling angle
The angle between the sling legs and the vertical significantly affects the permissible load.
The larger the angle, the lower the load capacity of the sling
Why does it matter? At wider angles, the force acting on the side legs increases – the sling may become overloaded even if the load does not exceed its nominal capacity
| Angle between sling legs | Sling load capacity factor | Notes |
|---|---|---|
| 0°–45° | 100% | Optimal lifting conditions |
| 45°–60° | 70–75% | Load capacity decreases – must be considered in selection |
| > 60° | DANGEROUS |
Use of the sling not recommended |
Selection of a chain sling
| Type of load | Recommended number of sling legs |
Type of sling |
Length adjustment | Notes |
| Simple, single element | 1 | Single-leg | No | The simplest solution |
| Pallet, evenly distributed weight | 2 | Double-leg | Optional | Stable and popular |
| Irregular load | 3 | Three-leg | Recommended | Even distribution of forces |
| Large, heavy load | 4 | Four-leg | Commonly used | For maximum stability |
| Asymmetrical load | 2–4 | Adjustable | Yes | Enables leveling |
Additional selection criteria:
- Operating temperature – not every chain is suitable for elevated temperatures
- Environment – slings used in humidity, oil, or chemicals must be properly protected (e.g., galvanized or coated)
- Attachment type – the hook must match the load’s attachment point
Sling selection is a responsibility
An improperly selected sling may lead to equipment overload, loss of load control, or even accidents. That’s why it’s worth consulting experts or using specialized load capacity calculators.
