6.1 Frequent vs Periodic Inspection
Key Takeaways
- Frequent inspection is a hands-on visual check by the user or designated rigger before each shift or use; periodic inspection is a deeper, documented review by a competent person on a service-based interval.
- Level I riggers must inspect rigging every shift or use for damage, missing tags, and obvious defects—and remove defective gear from service immediately.
- Any condition that creates doubt about continued safe use is a remove-from-service decision until a qualified evaluation clears or retires the item.
- Periodic inspections produce written records (date, item ID, inspector, findings, disposition); frequent checks are continuous operational duty even when a paper form is not required by the standard.
6.1 Frequent vs Periodic Inspection
Quick Answer: Frequent inspection is a visual check by the user or designated person before each shift or use. Periodic inspection is a more thorough, documented inspection by a competent person on intervals based on service severity. If gear fails either check, remove it from service immediately—do not “finish the lift first.”
Inspection is the largest single domain on the NCCCO Rigger Level I written exam (about 30%). The practical exam also includes a Pre-Use Inspection task. That weighting is intentional: most rigging failures that kill or injure people start with gear that should never have been on the hook.
ASME B30.9 (slings), related B30 volumes for hardware and below-the-hook devices, and OSHA rules (including 1910.184 and 1926.251) all expect a two-tier system: frequent checks that catch day-to-day damage, and periodic inspections that catch wear, stretch, and degradation that accumulates over time. Level I riggers live mostly in the frequent lane—but they must understand both so they know who signs records, how often gear is thoroughly reviewed, and what “competent person” means when a supervisor or inspector makes a disposition decision.
Frequent Inspection Defined
Frequent inspection is a visual examination performed by the person who will use the equipment (or another designated person) each day or before each shift / each use, depending on employer policy and how the gear is issued.
Typical characteristics of frequent inspection:
| Feature | Frequent inspection |
|---|---|
| Who | User, rigger, or designated person |
| When | Daily, each shift, or before each use |
| Depth | Visual; hands-on as needed (flex links, run fingers carefully for broken wires where safe) |
| Records | Not always required by the consensus standard for every frequent check; many employers still require a checklist or tag-out log |
| Outcome | Use as-is, or remove from service |
Frequent inspection is not a casual glance from ten feet away. It is a systematic walk-around of the sling body, eyes/end fittings, hardware, and identification. You are looking for the kinds of damage that develop between periodic inspections: broken wires from the last choke, a newly bent link, a heat mark from a recent weld spark, a missing tag after someone cut it off, or a crushed section from being run over by a forklift overnight.
What Level I Must Do Every Shift or Use
For Level I practice and the exam, treat the following as non-negotiable pre-use duties:
- Identify the gear — Confirm the item is the correct type and capacity for the planned hitch, and that identification is present and legible (rated load, material/type, manufacturer info as required for that product).
- Scan the full length — Body, legs, master links, coupling links, eyes, splices, sockets, thimbles, and any attached hardware you will use with it.
- Check contact and high-wear zones — Bearing points of chain links, outer wires on rope, load-bearing fabric on web, and areas that previously choked or sat on edges.
- Look for distortion — Kinks, birdcaging, bent links, opened hooks, elongated eyes, crushed sections.
- Look for environmental damage — Heat discoloration, severe corrosion, chemical attack, weld spatter, cuts, nicks, gouges.
- Decide — Accept for use, or remove from service and tag/quarantine so nobody “borrows” the bad sling.
If you cannot complete a meaningful inspection (poor light, mud-packed chain you cannot clean, ice covering fittings), you do not skip inspection—you clean, stage better lighting, or hold the lift until the gear can be examined.
Frequent Inspection Mindset on Simple Lifts
Level I work is “simple and repetitive” only when load data and configuration are known. Inspection duty does not relax because the lift is routine. Routine lifts are exactly where people stop looking and reuse damaged gear. Exam scenarios often reward the rigger who stops a familiar daily pick when a tag is missing or a few broken wires appear in a choke zone.
Periodic Inspection Defined
Periodic inspection is a complete inspection performed by a competent person (sometimes phrased as a designated person with the knowledge to recognize hazards and the authority to take corrective measures). It is more thorough than a frequent check and is performed on a defined interval based on service conditions.
| Feature | Periodic inspection |
|---|---|
| Who | Competent / designated person with inspection knowledge |
| When | Scheduled interval by service severity (see below) |
| Depth | Detailed examination of the entire sling or device; may include measurement, cleaning, and comparison to manufacturer criteria |
| Records | Required—written record of the inspection |
| Outcome | Continue in service, repair (only if allowed), or permanently remove |
Interval Concepts by Service (Exam Level)
ASME B30.9-style interval concepts for slings (wording may vary slightly by edition and product type, but the exam-level framework is stable):
| Service condition | Typical periodic interval concept |
|---|---|
| Normal service | Not to exceed 1 year |
| Severe service | Monthly to quarterly (more frequent; set by competent person) |
| Special / infrequent service | As recommended by a qualified person before use after long storage or unusual conditions |
Severe service means harsh environments or duty cycles: chemical exposure, elevated temperature, abrasive conditions, shock loading, multi-shift high-cycle use, or other conditions that accelerate damage. A yard that chokes steel plate all day outdoors is not “normal service” for synthetic web—or for chain that is constantly dragged and overloaded.
Important: Frequent inspection continues even when periodic inspection is current. A sling that passed last month’s periodic can still fail this morning’s frequent check after a single bad hitch.
Frequent vs Periodic — Side-by-Side
| Question | Frequent | Periodic |
|---|---|---|
| Primary purpose | Catch obvious damage before the next lift | Catch cumulative wear, measure against removal criteria, document status |
| Who typically does it | Rigger / user | Competent person |
| Timing | Every day / shift / use | Calendar or usage interval by service |
| Documentation | Often informal or employer-required; standard may not mandate a full written file for every frequent check | Written record expected |
| Measurement tools | Eyes, hands, basic gauges if needed | May include calipers, wear gauges, stretch measurement, comparison to manufacturer charts |
| Your Level I focus | Do this every use | Know it exists, respect intervals, use records, never put rejected gear back in the rack |
When to Remove from Service Immediately
Remove-from-service decisions do not wait for the next periodic date. Immediate removal applies when frequent or periodic inspection finds a defect that meets removal criteria—or when any condition creates doubt about continued safe use.
Core “pull it now” categories (detail criteria appear in the wire rope and chain sections that follow):
| Condition category | Examples |
|---|---|
| Identification failure | Missing, illegible, or incomplete sling ID / capacity tag |
| Structural damage | Broken wires beyond criteria, birdcaging, kinks, crushed rope, bent/cracked links, stretched chain |
| Heat / chemical damage | Blueing, melted fibers, weld spatter damage, chemical burns |
| Corrosion / wear | Severe pitting, wear at bearing points beyond criteria, wire diameter loss |
| End fittings | Cracked, deformed, worn sockets/eyes; damaged master links; opened/twisted hooks |
| Doubt | Damage you cannot fully evaluate; unknown history after shock load or overload event |
Immediate Removal Workflow (Field Practice)
- Stop using the item — Do not finish “one more pick.”
- Tag it — Clear “DO NOT USE” / rejected marking so it is obvious.
- Segregate — Separate from serviceable inventory (quarantine rack, locked cage, or cut and scrap per policy).
- Report — Notify supervision / competent person for disposition.
- Replace — Select undamaged gear that still meets capacity and hitch needs after inspection.
Destroying (cutting) irreparably damaged slings prevents the deadly “found in the scrap pile and reused” pattern. Employer policy and manufacturer guidance control repair eligibility; field welding of chain or “just a little weld on the eye” is not Level I repair practice.
Records Concepts for Periodic Inspection
Periodic inspection exists partly so the organization can prove gear was evaluated and so trends (wear, stretch, repeated damage) can be managed. Exam-level record concepts:
| Record element | Why it matters |
|---|---|
| Date of inspection | Proves interval compliance |
| Item identification | Serial/ID ties the record to a physical sling |
| Inspector identity | Accountability of the competent person |
| Description of findings | Wear measurements, defects noted, “OK” or “reject” |
| Disposition | Return to service, repair, or remove |
| Next due / interval basis | Supports scheduling under normal vs severe service |
Records do not replace frequent inspection. A green tag from last quarter does not authorize use of a sling with a newly missing ID tag or obvious birdcage.
Employers may also require frequent-inspection checklists, especially on multi-shift sites. Follow site rules—they can be stricter than the minimum consensus-standard baseline.
Competent Person vs Level I Rigger Role
On the exam, keep roles clean:
- Level I rigger / user: Performs frequent inspections, refuses damaged gear, knows removal criteria at a practical level, and escalates doubtful cases.
- Competent person (periodic): Has the knowledge to recognize relevant hazards and the authority to take corrective measures; performs thorough inspections and documents results.
- Manufacturer / authorized repair facility: Only path for many repairs (especially alloy chain, certain fittings). Field “repairs” that change geometry or heat-treat condition are forbidden in normal practice.
You are not expected to invent engineering acceptance criteria on the spot. You are expected to know that missing ID, distortion, broken wires beyond criteria, chain stretch, and heat damage end the discussion: remove from service.
Integrating Inspection into the Lift Sequence
A practical Level I sequence:
- Select candidate gear for known weight, hitch, and environment.
- Frequent-inspect every sling and piece of hardware before attach.
- Confirm tags/WLL still match the lift plan.
- Attach and re-check choke points, hardware orientation, and clearances.
- After the lift, re-inspect gear that was shock-loaded, side-loaded, run over an edge, or heated—then clean and store properly so the next frequent inspection is possible.
Poor storage (mud, chemicals, running over slings, hanging synthetics in UV for months) creates the defects your next frequent inspection must catch.
Exam Focus
Expect items that test the difference between frequent and periodic (who, when, documentation), immediate removal when defects appear, and the idea that identification missing = out of service. Choose answers that prioritize stopping use and tagging/segregating defective gear over “watch it carefully” or “use it only for light loads.” Capacity reduction for damaged gear is not an acceptable field practice on standard written-exam scenarios—removal is.
Which statement best describes a frequent inspection of a sling under typical ASME B30.9 / jobsite practice?
During a pre-use check, a Level I rigger finds the identification tag on an alloy chain sling is torn off and unreadable. What is the correct action?
How does periodic inspection primarily differ from frequent inspection?
A wire rope sling that passed periodic inspection six weeks ago shows new birdcaging after yesterday’s lift. What should the rigger do before the next pick?