Top 5 Rigging Inspection Failures and How to Prevent Them | Advantage Rigging

Most rigging failures don’t happen by surprise. They start small... with a worn sling, a bent shackle, or a missing tag that someone overlooked. The result can be downtime, compliance violations, or even serious injury.

The top rigging inspection failures include worn or damaged slings, missing or unreadable tags, bent or deformed hardware, improper load angles, and lack of proof testing. Preventing them requires regular inspections, compliance with OSHA and ASME standards, and certified proof testing.

Here’s how to spot these common problems and keep your gear jobsite ready.

1. Worn or Damaged Slings

Slings take the brunt of the load, and wear is inevitable. But once damage is visible, the sling should be removed from service immediately.

• Chain slings: look for stretched links, nicks, gouges, or cracks.

• Wire rope slings: check for broken wires, kinks, birdcaging, or crushed sections.

• Synthetic slings: watch for cuts, fraying, chemical burns, or melted fibers.

Prevention: Train crews to inspect before every lift. Never ignore visible wear. If in doubt, pull it out.

2. Missing or Unreadable Tags

Every sling must have a legible identification tag showing its Working Load Limit (WLL) and certification details. If the tag is missing or worn down, that sling is automatically out of service according to OSHA and ASME standards.

Prevention: Replace tags as soon as they show wear. Advantage Rigging provides durable replacement tags with every Sling Proof Test, keeping your gear compliant and easy to identify on the jobsite.

3. Bent or Deformed Hardware

Shackles, hooks, and eyebolts often fail inspections because of deformation. A hook throat that’s spread more than 5% or a shackle pin that’s bent can no longer carry its rated load safely.

Prevention: Always check hardware for cracks, stretching, or unusual wear. Replace any piece showing deformation. Hardware is cheap compared to the cost of an accident.

4. Improper Load Angles

Even good gear can fail when the load angle isn’t calculated correctly.

Example: A sling rated for 4,000 lbs in a straight lift may only be good for 3,000 lbs at a 60° angle. The steeper the angle, the greater the stress.

Prevention: Use multi-leg slings for angled lifts and train crews to calculate reductions. When in doubt, refer to the sling angle charts provided by ASME or your gear supplier.

5. Lack of Proof Testing and Certification

Perhaps the most overlooked failure isn’t visible at all. Gear that hasn’t been proof tested may pass inspection to the naked eye but still have internal weaknesses.

• OSHA 1926.251(a)(4) requires custom lifting devices to be tested at 125% of rated capacity before use.

• ASME B30 standards outline testing requirements for slings, shackles, hooks, and hoists.

Prevention: Schedule regular proof testing to verify equipment strength and maintain traceable certifications. Advantage Rigging uses a 225,000 lb Chant Engineering test bed to ensure accuracy, with detailed reports and replacement tags for every piece of equipment.

Frequently Asked Questions

What are the most common rigging inspection failures?
The top failures include worn slings, missing tags, bent hardware, improper load angles, and lack of proof testing.

When should rigging gear be removed from service?
Immediately if it shows visible damage, has a missing tag, or fails inspection criteria set by OSHA or ASME.

Why are sling tags required by OSHA?
Tags identify the sling’s WLL and certification. Without a legible tag, a sling is considered unsafe and out of service.

How do proof tests prevent rigging failures?
Proof testing applies a controlled overload to verify strength, revealing flaws that inspections can’t detect.

Keep Your Gear Compliant with Advantage Rigging

Inspection failures are preventable. With proper training, consistent checks, and certified proof testing, your crew can avoid accidents, costly downtime, and compliance headaches.

Advantage Rigging offers OSHA- and ASME-compliant proof testing, replacement tags, and a full catalog of slings, chains, and hardware. We make it simple to keep your gear safe, compliant, and ready for the toughest jobs.

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