Rigging Equipment Types & Uses: A Field Guide

Last updated: July 2026

Every shift, riggers make a bet they don't even know they're making—that the sling they grabbed, the shackle they clipped, and the angle they rigged at will all hold. A ten-year study of 249 crane incidents by Konecranes found that 27% of load drops were tied directly to poor rigging practices. Not equipment defects. Not crane operator error. Rigging mistakes—wrong sling selection, missed inspections, angles nobody checked.

We've worked with contractors who've had alloy chain links deform mid-lift and wire rope slings that should have been retired three jobs ago. The good news: almost every rigging failure is preventable. It starts with knowing what you're working with.

Rigging equipment is the collection of slings, hardware, fittings, and lifting accessories used to attach a load to a hoist or crane. In this guide, we'll break down the four categories every rigger needs to know—slings, hardware, below-the-hook devices, and hoists/blocks—and show you how to choose, inspect, and stay compliant on both sides of the border.

If you're not sure your crew has the competency verification to match their gear, that needs to be addressed before the first lift.

What Counts as Rigging Equipment?

Most people think "rigging" means slings and shackles. They're wrong. Rigging is a system, not a single component, and the failure of any one part in that system can bring the whole lift down.

Rigging equipment falls into four main categories:

1. Slings - The flexible connection between the hoist hook and the load. Wire rope, chain, and synthetic slings each behave differently under load, heat, and abrasion.
2. Hardware & Fittings - Shackles, hooks, eye bolts, master links, and turnbuckles. These are the connection points. When hardware fails, it fails catastrophically.
3. Below-the-Hook Lifting Devices - Spreader beams, lifting magnets, plate clamps, and vacuum lifters. These attach directly to the load when standard slings won't work or would damage the material.
4. Hoists & Blocks - Chain hoists, wire rope hoists, and snatch blocks. These aren't strictly rigging, but they live in the same workflow. We'll cover them briefly because riggers choose them together.

The blunt truth: crews with the best slings and the worst shackles aren't safe. The system is only as strong as its weakest link—and that link is usually the one nobody inspected.

Slings: Wire Rope, Chain, and Synthetic

Slings are the most-used rigging component and the most-failed when misapplied. Picking the wrong material for the environment—synthetic in a steel mill, wire rope on a polished architectural panel—is how $2,000 in damaged product turns into a $43,000 injury claim.

Wire Rope Slings

Wire rope slings are built from steel strands twisted around a core—fibre core (flexibility), wire strand core (strength), or independent wire rope core (IWRC) for both. Common constructions are 6×19 (more abrasion resistant) and 6×37 (more flexible), available as single-leg, bridle, or endless grommet.

They excel in heavy-duty, high-heat, and abrasive environments. An IWRC sling is rated to 400°F (204°C) per OSHA 29 CFR 1910.184.

Retirement criteria matter. Under OSHA 1926.251(c)(4)(iv), wire rope must be removed if more than 10% of wires are broken in any length equal to eight times the rope diameter. On a 1-inch rope, that's any 8-inch section.

Alloy Steel Chain Slings

Alloy steel chain slings are the workhorses of foundries and steel mills. They come in Grade 80 and Grade 100—higher grade means better strength-to-weight, not permission to overload. Field identification: Grade 80 (yellow paint), Grade 100 (orange paint), Grade 120 (blue paint)—check the stamped link markings. Available as single-leg, double-leg, multi-leg, and adjustable configurations. Their biggest advantage: individual links can be repaired or replaced.

OSHA 1926.251(b)(6) requires thorough periodic inspection at intervals no greater than 12 months, with records kept. If your records are on a clipboard in the site trailer, ask yourself how many of those clipboards have been lost in the rain.

Synthetic Web & Roundslings

Synthetic slings—nylon, polyester, and polypropylene—are the right choice when the load surface matters. They're non-marring, flexible, and colour-coded for capacity awareness (though colours aren't universal—always check the tag). Configurations include vertical, choker (~80% of vertical WLL), and basket hitches.

The limitations are real: heat, chemicals, UV, and cutting edges destroy synthetics faster than most crews expect. A synthetic sling dragged across a sharp I-beam edge is compromised. Full stop.

Metal Mesh & Fibre Rope Slings

Metal mesh slings—woven from stainless or carbon steel wire—handle hot, dirty environments where synthetics would melt and wire rope would clog. They're commonly used in metal fabrication and heat-treat operations.

Fibre rope slings are largely a legacy item, superseded by synthetics in most applications, but they're still regulated under OSHA 1926.251 and ASME B30.9. If you encounter them, inspect for rot, chemical damage, and broken fibres the same way you'd inspect a synthetic.

Sling inspection makes a solid toolbox talk topic—five minutes at morning huddle can prevent a catastrophic afternoon.

Rigging Hardware: Shackles, Hooks, and Fittings

Hardware failure is total system failure. It doesn't matter if your sling is brand new—if the shackle cracks or the hook straightens, the load drops. The most common violation we see: hardware rated below the connected sling's WLL. A 2-ton shackle on a 5-ton sling isn't just wrong—it's a hazard.

Shackles

Shackles come in two primary body styles: anchor shackles (wide bow, for side loading and multiple connections) and chain shackles (narrow, for straight-line loads). Closure types matter too: screw-pin shackles are quick to rig and adjust; bolt-type shackles are for semi-permanent or long-term installations where the pin shouldn't back out.

ASME B30.26 governs shackles and other rigging hardware. Every shackle must be marked with its WLL and manufacturer identification. If the marking is worn off, the shackle is out of service until a competent person can verify its rating.

Hooks

Hook types include sling hooks (with latch), hoist hooks, self-locking hooks, and grab hooks. The latch is not decorative—OSHA requires it to prevent the sling or load from accidentally disengaging.

ASME B30.10-2024 (approved October 2024, effective January 2026) updated marking requirements: every hook must display its rated load and manufacturer ID. Self-locking hooks close automatically under load—a feature that should be standard on any lift where personnel are below the load path.

Eye Bolts, Swivel Hoist Rings & Turnbuckles

Eye bolts are deceptively simple—and commonly misapplied. Plain eye bolts are for in-line loads only. Shoulder eye bolts handle angular loading up to 45°. Exceed that angle and the bolt bends or pulls from its anchor.

Swivel hoist rings offer 360° rotation and 180° pivot for precise load control. Turnbuckles adjust tension or length in jaw-jaw, eye-eye, or hook-hook configurations. Always torque to manufacturer spec. A bent eye bolt is scrap—never attempt to straighten it.

Master Links, Wire Rope Clips & Load Binders

Master links (also called oblong links) gather the legs of multi-leg slings. They must be rated for the combined load of all connected legs at the intended sling angle—not just one leg's WLL.

Wire rope clips secure the eye in a wire rope sling. Under OSHA 1926.251(c)(5) Table H-2, the U-bolt goes on the dead (short) end of the rope, never the live (long) end. Install them backwards and the eye can pull through under load.

Load binders—ratchet and lever types—tension chain during transport. They're not lifting devices; they're cargo securement tools. Don't confuse the two.

For advanced rigging scenarios involving complex load geometry or critical lifts, see our guide on complicated rigging setups and engineered lift planning.

Below-the-Hook Lifting Devices

Sometimes standard slings won't work. The load is too awkward, the surface can't be marked, or the geometry doesn't allow a safe hitch. That's where below-the-hook devices come in.

Spreader Beams & Lifting Beams

A spreader beam converts compressive forces through a triangulated structure, keeping sling legs at a fixed angle and preventing inward crush on the load. A lifting beam handles bending moments directly, suspending the load from a central point with multiple drop points below. Both are used when balanced pick points are needed or headroom is too limited for a traditional sling configuration.

The distinction matters for engineering. A spreader beam is in compression; a lifting beam is in bending. Design them for the wrong force and they fail differently.

Clamps, Vacuum Lifters & Lifting Magnets

Plate clamps grip steel plate edges for vertical or horizontal lifts. Beam clamps attach directly to structural steel. Drum clamps handle cylindrical containers. Each is rated for a specific load geometry—using a plate clamp on a pipe is a recipe for slippage.

Vacuum lifters use suction to grip flat, non-porous materials like glass or polished sheet metal. ASME B30.20 requires backup vacuum systems or mechanical locks—if the pump fails, the load doesn't drop.

Lifting magnets, whether permanent or electromagnetic, require a holding-capacity test before each lift. They're fast and efficient for steel plate, but they don't work on thin or dirty material. A layer of mill scale can reduce holding force by 50%.

C-Hooks & Coil Lifters

These are purpose-built for specific geometries—steel coils, concrete pipes, reels. They're designed so the load's own weight locks the device in place. If your shop handles repetitive lifts of the same product, investing in the right below-the-hook device is cheaper than repairing damaged stock.

Sling Angles: Why They Matter

Sling angle is the single most misunderstood rigging concept in the field—and the most common source of overload. Most riggers know that a steep sling angle looks safer. Fewer know exactly how much it costs them in capacity.

Here's the physics: as the angle between a sling leg and the horizontal decreases, the tension in each leg increases. At 60°, each leg carries 1.155 times the vertical load. At 45°, it's 1.414×. At 30°, it's 2.0×. A two-leg bridle at 30° isn't twice as strong as a single leg—it's carrying double the tension per leg.

Practical rule: never allow a sling angle below 30° without engineered approval. Below that, the tension multiplier climbs fast, and most hardware isn't rated for the forces involved. We once saw a crew rig a 4-ton transformer with a two-leg bridle at roughly 20°. The math said each leg was seeing nearly 3× the load. They got lucky. Math doesn't care if you got lucky last time.

Reference: Yale Environmental Health & Safety and Unirope industrial sling guides.

Inspection Requirements by Equipment Type

OSHA 29 CFR 1926.251(a)(1) is unambiguous: rigging equipment shall be inspected prior to use on each shift and as necessary during use by a competent person. That doesn't mean "glance at it." It means a systematic check of the components you're about to trust with a load.

The gap between "best practice" and "mandatory" is where most crews get caught. You don't need a record for every synthetic sling inspection—but if an incident happens and you have no documentation of your inspection program, good luck explaining that to an investigator.

And here's the messy reality on most sites: inspections are tracked on a paper checklist in the site trailer. Rain destroys paper. Coffee spills erase pencil. Supervisors sign off on inspections they didn't witness because it's shift-end and everyone wants to go home. If that sounds like your operation, the problem isn't the regulation—it's the system.

Rigging Standards: US vs. Canada at a Glance

Both countries share the same rigging safety principles, but the regulatory structure is different. The US has federal OSHA standards. Canada has provincial OHS regulations. Cross-border contractors need to know which jurisdiction they're in and what standard applies.

Canada does not have a single federal rigging code. Ontario Regulation 213/91 (Construction Projects) covers rigging and hoisting specifically. Alberta's OHS Code Part 6 addresses cranes, hoists, and lifting equipment. British Columbia's OHS Regulation Part 14 does the same. If you're working across provinces, you need to know which regulation governs your site—not just "Canadian OHS."

ASME standards are widely referenced in Canadian industry even though CSA standards are the legal baseline. A rigger in Calgary or Toronto is likely trained to ASME B30.9 whether or not they know it.

If your operation spans multiple jurisdictions and you're not sure which provincial rules apply, outsourcing compliance program development to a team that tracks both US and Canadian requirements may save you from a stop-work order.

For a broader overview of rigging safety principles, inspection protocols, and training requirements, refer to our complete rigging safety guide.

Frequently Asked Questions