A rigging inspection checklist is your first line of defense before any load leaves the ground. Skipping even one step can turn a routine lift into a serious incident. Whether you are a seasoned rigger or just getting started, a consistent pre-lift inspection process protects your crew, your equipment, and your job site.

This guide walks you through every critical check on your rigging gear checklist, from wire rope slings and shackles to below the hook lifting devices. Use it before every lift, without exception.

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Why a Rigging Inspection Checklist Matters on Every Job

OSHA standard 1926.251 requires that rigging equipment be inspected before each use. This is not optional. Damaged rigging gear can fail without warning, dropping loads and injuring workers nearby.

A structured below the hook inspection also protects you legally. If an incident occurs and you cannot show documented inspections, liability exposure grows quickly. A written checklist creates a paper trail that demonstrates due diligence on every shift.

Beyond compliance, consistent inspections extend the service life of your rigging gear. Catching a small nick in a wire rope or a slightly bent shackle pin early prevents costly failures and unexpected downtime.

Understanding Below the Hook Inspection Requirements

Below the hook (BTH) refers to all lifting devices and rigging hardware attached beneath the crane hook. This includes slings, shackles, hooks, lifting beams, spreader bars, and similar attachments. ASME B30.20 and OSHA 1926.251 govern BTH equipment inspections.

There are two inspection types you need to know:

• Initial inspection: Performed before new or repaired equipment is first put into service.
• Periodic inspection: Performed at regular intervals based on service frequency, typically monthly to annually depending on usage.

Your daily pre-lift check falls under frequent inspections. It is a visual and hands-on review that happens every shift the equipment is used. Never substitute a visual scan from a distance for a proper close-up inspection of each component.

Wire Rope Sling Inspection Points

Wire rope slings are strong, but they degrade over time through bending, corrosion, and abrasion. Your rigging inspection checklist must include a thorough review of every sling in the lift.

Key Defects That Require Removal from Service

• Broken wires: Remove a sling if it has 10 or more broken wires in one lay length, or five or more broken wires in one strand.
• Kinking: Any permanent kink distorts the wire structure and reduces rated capacity significantly.
• Bird caging: This term describes when strands separate and the rope looks like a cage. It signals internal fatigue.
• Corrosion: Surface rust that cannot be brushed off, or pitting visible on individual wires, warrants removal.
• Heat damage: Discoloration, melted lubricant, or fused wires indicate heat exposure that weakens the sling.
• Reduction in diameter: A sling that has lost more than one-third of its original diameter at any point must be removed.

Check each sling along its full length, including the eyes and fittings. Do not overlook the choke point where the sling wraps under a load, as wear concentrates there.

Chain Sling Inspection Points

Chain slings are durable and handle high-temperature environments that would damage wire rope or synthetic slings. They still require close inspection before every lift.

What to Look For on Chain Slings

• Elongation: Measure the chain and compare it to the original length. If any section has stretched more than 3 percent, take it out of service.
• Link wear: Each link must be measured at the point of maximum wear. If wear exceeds the manufacturer’s allowable limits, replace the chain.
• Cracks and gouges: Look for nicks, gouges, weld splatter, and cracks at link welds. Any crack is an automatic removal.
• Twists and distortion: A link that is bent, twisted, or opened up from its original shape cannot be trusted at rated capacity.
• Corrosion: Surface corrosion that causes pitting weakens individual links and reduces the overall rated capacity.

Never attempt to repair a damaged chain sling by welding on the job site. Only the manufacturer or a qualified repair facility can restore a chain sling to rated capacity.

Synthetic Sling and Roundsling Inspection Points

Synthetic slings, made from nylon or polyester, are lightweight and load-friendly on soft or finished surfaces. Roundslings encase the load-bearing fibers in a protective cover. Both require a specific set of checks.

Removal Criteria for Synthetic Slings

• Cuts and tears: Any cut that penetrates the load-bearing fibers is cause for immediate removal.
• Acid or caustic burns: Chemical damage weakens synthetic fibers rapidly and may not be visible on the surface.
• Heat damage: Melted, glazed, or charred fibers indicate heat exposure that destroys load capacity.
• Missing or illegible tags: If the identification tag is gone or unreadable, the sling must be removed. You cannot know its rated capacity.
• Holes or worn cover: For roundslings, a hole or tear in the outer cover exposes load-bearing yarns to damage and contamination.

Store synthetic slings away from sharp edges, chemicals, and direct sunlight. UV exposure degrades synthetic fibers over time even without visible damage.

Shackle and Hook Inspection Points

Shackles connect slings to loads and to the crane hook. Hooks come in various types, from grab hooks to foundry hooks. Both are critical links in the lifting chain and deserve careful attention on your rigging gear checklist.

Shackle Checks

• Pin security: The shackle pin must be fully seated, moused (safety-wired), or secured with a cotter pin to prevent rotation under load.
• Distortion: Any spreading of the shackle bow or bending of the pin means the shackle has been overloaded. Remove it immediately.
• Wear at the bow: Measure wear on the inside of the bow where slings contact it. Wear beyond manufacturer limits reduces rated capacity.
• Cracks and nicks: Use a flashlight and inspect all surfaces. A crack anywhere is an automatic disqualifier.

Hook Checks

• Throat opening: Measure the throat. If it has opened more than 15 percent from its original dimension, remove the hook from service.
• Twist: A hook that has twisted more than 10 degrees from its original plane must be removed.
• Safety latch: The latch must close fully and spring back into position. A damaged or missing latch is a removal condition.
• Cracks and surface damage: Check the entire hook body for gouges, cracks, and corrosion, especially at the saddle and eye.

Hardware, Fittings, and Lifting Beams on Your Rigging Gear Checklist

Your rigging gear checklist extends beyond slings and hooks. Every component that carries load must pass inspection. This includes turnbuckles, eyebolts, hoist rings, lifting clamps, spreader bars, and lifting beams.

Quick Checks for Common Hardware

• Eyebolts: Check for bending, thread damage, and proper seat against the load surface. Shouldered eyebolts must be fully torqued down before use.
• Turnbuckles: Inspect for distortion, thread engagement (at least one diameter of thread must be engaged), and proper mousing or locking.
• Hoist rings: Confirm the ring pivots freely in all directions. A ring that binds may not swivel under load, creating side loading and failure risk.
• Lifting clamps: Check jaw condition, spring tension, and locking mechanism. Verify the clamp is rated for the material thickness you are lifting.
• Spreader bars and lifting beams: Look for cracks in welds, missing or damaged end attachments, and ensure the rated capacity tag is present and legible.

Documenting Your Rigging Inspection Results

A verbal “looks good” is not documentation. You need a written or digital record that names the equipment, the inspector, the date, and the findings. This record becomes critical evidence if a piece of gear is later implicated in an incident.

Your documentation should include:

• Equipment type and identifier (serial number, tag number, or description)
• Date and shift of inspection
• Inspector name and qualification
• Pass or fail status for each item
• Action taken on failed items (removed, tagged out, returned to supplier)

Keep inspection records on file for at least as long as the equipment remains in service, and longer if your company or site requires it. Many contractors in North Carolina and across the country now use digital checklists on tablets or phones, which automatically timestamp and archive records.

Common Mistakes That Compromise Rigging Inspections

Even experienced riggers fall into habits that weaken their inspection process. Knowing the most common mistakes helps you avoid them before they become incidents.

Habits That Put Crews at Risk

• Skipping the inspection under time pressure: Schedule pressure is the most common reason inspections are rushed or skipped. No deadline is worth a dropped load.
• Inspecting in poor lighting: Dark corners, shadows, and nighttime work hide cracks and wear. Always use a flashlight, even during daylight hours.
• Ignoring the middle of the sling: Most riggers check the eyes and hooks but rush through the body of the sling. Wear and damage occur along the full length.
• Using gear with unreadable tags: If you cannot read the rated capacity, you cannot safely use the equipment. Period.
• Failing to remove gear from service: Discovering a defect and continuing to use the equipment because “it looks like it will hold” is not an acceptable risk assessment.

Final Thoughts on the Rigging Inspection Checklist

A complete rigging inspection checklist is not a formality. It is a proven process that prevents serious injuries and equipment failures. Every component in your rigging system, from the sling eye to the shackle pin, deserves attention before the load goes up. The few minutes you invest in a thorough below the hook inspection can prevent incidents that no crew should ever face.

If your team needs structured training to build consistent inspection habits, professional rigger training programs can close that gap fast. Crews across North Carolina are raising their safety standards one inspection at a time, and your job site can do the same.

Frequently Asked Questions About the Rigging Inspection Checklist

How often should I perform a rigging inspection?

You must perform a visual inspection before every use, as required by OSHA 1926.251. In addition, periodic inspections are required at regular intervals based on how frequently the equipment is used. High-use rigging may need monthly periodic inspections, while lighter-use gear may only require quarterly or annual reviews.

Who is qualified to inspect rigging equipment?

A qualified rigger, as defined by OSHA, must perform pre-use inspections. This is someone who has the knowledge, training, and experience to identify rigging hazards and select the correct rigging for a given lift. Formal training through a recognized rigger training program supports this qualification and helps establish documented competency.

What happens if I find a defect during inspection?

Remove the item from service immediately. Tag it clearly so no one else picks it up and uses it. Do not attempt field repairs on slings, chains, or hooks unless you are the manufacturer or a certified repair facility. Notify your supervisor and document the defect and the action taken.

Do synthetic slings need the same inspection as wire rope slings?

Yes, but the specific defects you look for differ. Synthetic slings are vulnerable to cuts, UV damage, heat, and chemical exposure, while wire rope slings fail from broken wires, kinking, and corrosion. Both types must be inspected before every use, and both must be removed from service when removal criteria are met under ASME B30.9.

Can I use a digital checklist instead of a paper form?

Yes. Digital inspection records are acceptable and often preferred because they timestamp automatically and store data in a searchable format. The key requirement is that the record must be complete, accurate, and retrievable if needed during an audit or incident investigation. Paper and digital formats both meet this need when used correctly.