A daily lifting sling inspection takes about 3 to 5 minutes and can identify damage before a load falls. This checklist covers webbing sling condition, synthetic sling safety, lifting equipment inspection, and the main reject signs that require immediate removal from service.
Every operator should inspect a lifting sling before the first lift of each shift and again after any event that may cause damage. A sling with cuts, melted fibers, chemical burns, missing identification, or damaged fittings must not be used. Lihua recommends recording the inspection result for each sling used in regular lifting work.
Quick Answer: What Must Be Checked Every Day?
Inspect the sling identification tag, webbing, stitching, eyes, protective sleeves, hooks, shackles, and other fittings. Look for cuts, holes, tears, broken stitches, abrasion, heat damage, chemical damage, knots, stretching, corrosion, cracks, and deformation. Confirm that the sling has the correct working load limit for the planned lift.
- Confirm the sling type and working load limit.
- Check that the identification tag is present and readable.
- Inspect the full length of the webbing or wire rope.
- Examine the eyes, seams, and stitching.
- Inspect hooks, links, shackles, and other fittings.
- Look for heat, chemical, ultraviolet, and moisture damage.
- Check for knots, twists, flattening, stretching, or bird caging.
- Confirm that the sling will not be cut or crushed by the load.
- Remove damaged slings from service and mark them clearly.
- Record the inspection and report serious defects.
1. Confirm the Sling Identity and Rated Capacity
Check the identification tag
Before looking for physical damage, confirm that the sling can be identified. A tag should normally show the manufacturer, sling material, length, rated capacity, and applicable lifting configuration. The tag may also show the product standard, serial number, or date information.
Do not use a sling with a missing, damaged, or unreadable tag when its capacity cannot be confirmed. The color of a sling is not a safe substitute for a rating tag because color systems may differ between manufacturers and markets.
Match capacity to the planned lift
The working load limit depends on sling type, hitch type, sling angle, load shape, and contact conditions. A sling rated for a vertical lift may have a lower capacity in a basket or choker arrangement. A narrow sling angle creates higher tension in each leg.
| Inspection point | Acceptable condition | Reject or stop condition |
|---|---|---|
| Identification tag | Attached, clean, and readable | Missing, torn, or unreadable |
| Working load limit | Suitable for the load and hitch | Unknown or too low for the lift |
| Sling length | Matches the lifting plan | Length cannot be confirmed |
| Manufacturer information | Clearly identified | Cannot be traced or verified |
2. Inspect the Full Webbing or Rope Surface
Look for cuts, tears, and abrasion
Lay the sling out straight and inspect both sides from end to end. Run your eyes over areas that touch the load, hooks, corners, and floor. Search for cuts, holes, snags, pulled fibers, worn areas, and exposed internal yarns.
A small cut can become larger when the sling is tensioned. Abrasion can reduce the strength of a synthetic webbing sling without producing a large visible hole. If the damage changes the width, thickness, or texture of the webbing, remove the sling from service until a qualified person makes a decision.
Inspect wire rope slings for strand damage
For wire rope slings, check for broken wires, kinks, crushed sections, bird caging, corrosion, heat damage, and reduced diameter. Pay close attention to the eyes, end fittings, and points that pass around corners.
Do not straighten a kinked wire rope sling and return it to work. A kink changes the rope structure and can reduce its strength. A qualified inspector should assess any wire rope sling with serious deformation or multiple broken wires.
3. Check Webbing Sling Edges, Seams, and Stitching
Examine the edges
The edges of a polyester or nylon sling often show damage first. Check for fraying, melted edges, cuts, hard spots, and pulled yarns. Edge damage may result from sharp steel plates, rough concrete, hooks, or poor storage.
Examine load-bearing stitching
Inspect every row of stitching in the eye, connection point, and end termination. Missing stitches, broken threads, loose seams, and pulled stitching are warning signs. Never repair load-bearing stitching with ordinary thread or an unapproved sewing machine.
Important: Surface dirt is not always a defect, but dirt can hide damage. Clean the sling according to the manufacturer's instructions before making a final inspection.
4. Check for Heat, Chemical, and Ultraviolet Damage
Heat damage
Heat can melt or weaken synthetic fibers. Look for glazed surfaces, hard or brittle areas, discoloration, melted yarns, and local shrinkage. Contact with welding sparks, hot metal, exhaust pipes, or an overheated machine can damage a sling in seconds.
Chemical damage
Chemical exposure may cause swelling, softening, stiffening, discoloration, or weakened fibers. Acids, alkalis, solvents, paint chemicals, and cleaning agents can affect sling materials differently. If the chemical exposure is unknown, isolate the sling and ask the manufacturer or a qualified inspector for guidance.
Ultraviolet and moisture damage
Long-term sunlight can reduce the strength of synthetic slings. Check for fading, powdery fibers, stiffness, and a dry or brittle feel. Wet storage may lead to mildew or fiber damage. Store clean slings in a dry, shaded, ventilated area away from direct sunlight.
| Damage source | Common visual sign | Immediate action |
|---|---|---|
| Heat or welding sparks | Melted, glazed, hard, or brittle fibers | Remove from service |
| Chemicals | Swelling, discoloration, softening, or stiffness | Quarantine and identify the chemical |
| Sunlight | Fading, powdering, or brittle webbing | Stop use and request an assessment |
| Moisture | Mildew, odor, rust, or weakened fibers | Dry safely and inspect before use |
5. Inspect the Eyes, Sleeves, and Protective Covers
Check the sling eyes for cuts, stretching, abrasion, and damaged stitching. The eye must sit correctly on the hook or fitting without being forced, folded, or loaded against the hook tip. Never place a sling eye on a hook tip because the sharp point can damage the fibers.
Inspect wear sleeves, corner protectors, and sliding sleeves. A protective cover should remain in the correct position and should not be torn, crushed, or so worn that the sling touches a sharp edge. A sleeve is not a replacement for a suitable edge protector.
6. Inspect Hooks, Links, and Other Fittings
Hook inspection
Check hooks for cracks, bending, twisting, excessive throat opening, sharp edges, and damaged safety latches. The latch should close correctly when fitted. A hook that has opened under overload must be removed from service even if it appears usable.
Shackle and link inspection
Look for bent bodies, stretched holes, damaged pins, heavy wear, cracks, and corrosion. Pins should be the correct type and fully engaged. Do not replace a shackle pin with a bolt, nail, or other improvised item.
Fittings must be compatible with the sling and load. A strong sling can fail when connected to a sharp, undersized, or damaged fitting. Lihua advises buyers and distributors to keep fitting inspection records with the sling product record.
7. Check for Knots, Twists, and Shape Changes
A knot can reduce the effective strength of a synthetic sling and can create a concentrated stress point. Remove the sling from use if it has a knot, twist that cannot be corrected, permanent stretching, unusual narrowing, or crushed sections.
A sling should be loaded evenly. Do not pull a sling from under a load, drag it across the floor, or allow a load to roll over it. These actions can create hidden damage that is difficult to see during a quick inspection.
8. Follow This Daily Inspection Flow Chart
Use the following process before each shift. It keeps the inspection consistent for operators, warehouse teams, and lifting supervisors.
Step 1: Stop and identify the sling.
Next, check the tag, material, length, and working load limit.
Step 2: Lay the sling out fully.
Inspect both sides, edges, eyes, seams, and protective covers.
Step 3: Inspect every fitting.
Check hooks, latches, links, shackles, and connection points.
Step 4: Search for damage sources.
Look for heat, chemicals, sunlight, moisture, sharp edges, and overload signs.
Step 5: Make the decision.
If safe, use it within its rating. If uncertain, do not use it.
Step 6: Record the result.
Mark failed slings and send them for qualified assessment or disposal.
9. Know When to Remove a Sling from Service
Remove a sling immediately when you find a cut, hole, melted fiber, chemical burn, broken load-bearing stitch, damaged fitting, missing tag, knot, severe abrasion, broken wire, kink, bird caging, crack, or permanent deformation.
Do not place a rejected sling in the normal storage rack. Mark it with a clear out-of-service label and move it to a controlled quarantine area. This prevents another operator from selecting it by mistake.
| Condition | Can the sling be used? | Required decision |
|---|---|---|
| Clean sling with readable tag and no damage | Yes, within the rated capacity | Record as acceptable |
| Minor dirt that does not hide damage | Usually, after cleaning and checking | Follow site procedure |
| Unknown chemical or heat exposure | No | Quarantine for assessment |
| Cut, tear, melted fiber, or broken stitching | No | Remove from service |
| Missing identification tag | No, if capacity is unknown | Quarantine and verify traceability |
10. Record Daily Results and Improve Sling Life
What to include in an inspection record
A useful record includes the date, sling identification number, inspector name, work location, condition, defects found, action taken, and next review date. A simple paper form, spreadsheet, or digital inspection system can be used if it is easy for operators to complete.
Daily checks do not replace formal inspections required by the site, customer, or local regulations. A competent person should perform periodic inspections at an interval based on use, environment, load type, and company policy. High-use slings may require more frequent detailed inspections.
Storage and handling practices
- Store slings on racks instead of on wet or dirty floors.
- Keep synthetic slings away from direct sunlight and heat.
- Separate slings from chemicals, welding areas, and sharp tools.
- Use corner protection for loads with sharp edges.
- Do not drag, knot, twist, or drop slings.
- Allow wet slings to dry before long-term storage.
- Keep rejected slings in a separate quarantine area.
Daily Lifting Sling Inspection Checklist Printable Summary
[ ] Tag is attached and readable.
[ ] Working load limit matches the planned lift.
[ ] Full webbing or wire rope has been checked.
[ ] No cuts, tears, holes, broken wires, or severe abrasion are visible.
[ ] No melted, glazed, brittle, discolored, or chemically damaged fibers are visible.
[ ] Stitching, eyes, and seams are secure.
[ ] Protective sleeves and corner guards are in usable condition.
[ ] Hooks, latches, links, and shackles are not cracked or deformed.
[ ] No knots, twists, kinks, stretching, crushing, or bird caging are present.
[ ] Sling is stored correctly after use.
[ ] Defects are recorded and damaged slings are quarantined.
Frequently Asked Questions
How often should lifting slings be inspected?
Inspect lifting slings before the first use of each shift and before each lift when conditions may have changed. Perform additional inspections after overload, impact, chemical contact, heat exposure, or contact with a sharp edge.
Can a damaged webbing sling be repaired?
Do not repair a load-bearing webbing sling with home sewing, glue, tape, knots, or metal clips. A qualified manufacturer or approved repair facility must decide whether an authorized repair is possible. Many slings with cuts, melted fibers, or chemical damage must be destroyed.
What is the most common reason for sling failure?
Common causes include sharp-edge contact, incorrect sling angle, overloading, poor storage, chemical exposure, heat, damaged fittings, and failure to inspect the sling. Correct lifting plans and daily inspection reduce these risks.
What should I do if I am not sure whether a sling is safe?
Do not use it. Remove it from the lifting area, identify it as suspect, and ask a competent person, manufacturer, or qualified inspector to assess it. When safety is uncertain, replacement is safer than testing the sling with a load.
Conclusion
A daily lifting sling inspection is a short but essential safety control. Check the tag, capacity, webbing, stitching, fittings, protective covers, and signs of heat or chemical damage. If a defect affects the sling's strength or identity, remove it from service immediately. By using this 10-point checklist, distributors, operators, and lifting teams can reduce preventable failures and extend the useful life of safe equipment. Lihua supports buyers with clearly identified lifting sling products and practical inspection guidance for daily operations.
