Rigging safety refers to the proper selection, inspection and use of slings, shackles, hooks and other hardware used to connect loads to cranes, hoists and other lifting equipment. A rigging and lifting safety program must include qualified rigger training, documented lift planning, daily sling inspection procedures and load weight verification to prevent the dropped loads, tip-overs and struck-by incidents that account for hundreds of workplace fatalities each year in North America.

Why Rigging Safety Is Critical

Rigging failures are catastrophic. When a sling breaks, a shackle fails or a load shifts unexpectedly, the consequences range from severe crush injuries to fatalities. The Bureau of Labor Statistics reports that crane and rigging-related incidents account for approximately 90 fatalities per year in the United States alone, with thousands more non-fatal injuries.

The root causes of rigging incidents are overwhelmingly preventable. Overloaded slings, damaged rigging hardware, improper hitch configurations and inadequate lift planning appear repeatedly in incident investigations. A disciplined rigging safety program that addresses each of these factors eliminates the conditions that lead to failure.

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OSHA Requirements for Rigging Operations

OSHA regulates rigging through several standards depending on the industry and equipment involved:

Key OSHA requirements for rigging include:

Understanding Sling Types and Capacities

Selecting the right sling for a lift is the first step in rigging safety. Each sling type has specific advantages, limitations and inspection criteria.

Wire Rope Slings

Wire rope slings are the most versatile and widely used rigging slings. They offer high strength-to-weight ratios, resistance to abrasion and good performance in high-temperature environments. Wire rope slings are available in single-part, braided and cable-laid configurations.

Rated capacities depend on the rope diameter, construction type and hitch configuration. A wire rope sling used in a choker hitch has a significantly lower rated capacity than the same sling in a vertical hitch - typically about 75% of the vertical rating.

Synthetic Web Slings

Nylon and polyester web slings are lightweight, flexible and gentle on finished surfaces. They are ideal for lifting loads where surface damage is a concern. However, synthetic slings are vulnerable to cuts, UV degradation, chemical exposure and heat. They must never be used in environments exceeding 180 degrees Fahrenheit for nylon or 194 degrees Fahrenheit for polyester.

Chain Slings

Alloy steel chain slings offer the highest durability and temperature resistance of any sling type. They can operate in temperatures up to 1,000 degrees Fahrenheit (with reduced capacity above 600 degrees Fahrenheit). Chain slings are the preferred choice for hot work, foundry operations and environments with sharp edges that would damage wire rope or synthetic slings.

Synthetic Round Slings

Round slings consist of continuous polyester fiber yarns enclosed in a protective cover. They offer excellent flexibility, light weight and surface protection. Color coding indicates rated capacity, making quick identification easy. Like web slings, they are sensitive to cuts, chemicals and temperature extremes.

Sling Inspection Procedures

Every sling must be visually inspected before each use by a competent person. More thorough periodic inspections must be conducted by a qualified person at intervals based on sling type, frequency of use and severity of service conditions.

Wire Rope Sling Inspection Criteria

Remove wire rope slings from service if any of the following conditions are found:

Synthetic Sling Inspection Criteria

Remove synthetic web and round slings from service if you find:

Chain Sling Inspection Criteria

Remove chain slings from service if inspection reveals:

Documenting sling inspections creates an audit trail that demonstrates compliance and helps identify slings approaching the end of their service life. Digital inspection platforms make it easy to log sling conditions, attach photos of defects and trigger automatic removal orders when criteria are met.

Lift Planning Fundamentals

Every lift should be planned before it is executed. The complexity of the plan scales with the risk level of the lift, but even routine lifts require basic planning elements.

Determining Load Weight

Never estimate load weight. Use one or more of these methods to determine the actual weight:

Always add a margin for unknowns. Moisture, ice, debris or attached hardware can increase load weight beyond published specifications.

Selecting the Rigging Configuration

The rigging configuration must account for:

Critical vs. Routine Lifts

Critical lifts - those involving loads exceeding 75% of crane capacity, lifts over occupied areas, multiple crane picks or loads with unknown weights - require a detailed written lift plan that includes crane configuration, load charts and engineering review. Routine lifts still require verbal planning between the rigger, operator and signal person covering load weight, rigging selection, lift path and landing zone.

Rigging Safety Best Practices

Beyond inspection and planning, these operational practices prevent the most common rigging incidents:

Never Side-Load a Hook

Crane and hoist hooks are designed to carry loads vertically through the center of the hook saddle. Side-loading - applying force at an angle to the hook - can reduce hook capacity by 60% or more and lead to catastrophic failure.

Use Tag Lines

Tag lines control load rotation and swing during lifting. Every suspended load should have at least one tag line attended by a worker positioned outside the load's swing radius. Never wrap tag lines around hands or body parts.

Protect Slings from Sharp Edges

Sharp corners on structural steel, concrete panels and fabricated components can sever wire rope and synthetic slings in seconds under load. Use softeners, corner pads or protective sleeves at every contact point between slings and load edges.

Verify Load Security Before Lifting

Before giving the signal to hoist, the rigger must verify that all sling connections are secure, the load is properly balanced, tag lines are attached and all personnel are clear of the load path. A slow initial lift of a few inches - called a proof lift - confirms that the rigging is holding and the load is balanced before proceeding to full height.

Training and Qualification Requirements

OSHA requires that rigging for crane lifts in construction be performed by a qualified rigger. A qualified rigger is defined as a person who possesses a recognized degree, certificate or professional standing, or who has extensive knowledge, training and experience and can successfully demonstrate the ability to solve rigging problems.

Rigger training should cover sling types and ratings, hitch configurations, load weight determination, center of gravity concepts, sling angle factors, hardware inspection and communication signals. Many organizations use a combination of classroom instruction, hands-on field exercises and written/practical evaluations to certify riggers.

Building a Rigging Safety Program

A complete rigging safety program includes written procedures, qualified personnel, maintained equipment, documented inspections and continuous improvement. The most effective programs centralize rigging inspection records, training documentation, lift plans and incident data in a single system that provides visibility from the field to management.

Ready to tighten up your rigging and lifting safety program? Book a demo to see how Make Safety Easy manages sling inspections, training records and lift documentation in one connected platform, or explore pricing to get started.