Round Slings

Round Sling Types

Round slings share the same core principle - continuous polyester yarn inside a protective cover - but vary in how that core is packaged and what the cover is made of. The differences affect load capacity range, surface sensitivity, and where you'd reach for one over another.

Polyester Round Slings

The standard in synthetic lifting. The core is a bundle of continuous-filament polyester yarns looped inside a tubular polyester cover. Polyester carries good resistance to sunlight and most common industrial chemicals, and the material has a low stretch profile under load compared to nylon - which means the load doesn't settle or shift as the sling loads up.

Cover color identifies the working load limit range per WSTDA RS-1 color-coding convention. A rigger who knows the color system can read the sling from across a yard without looking for the tag. The tag itself carries the complete WLL data per configuration (vertical, choker, basket), the manufacturer, and the product identification required by WSTDA RS-1. Individual product pages carry the specific WLL values for each sling in our catalog.

Polyester round slings are the default choice for general industrial work - machinery rigging, structural steel, pipe handling - where the load has curved or polished surfaces that a flat web sling's edge could mark or deform.

High-Performance Synthetic Round Slings

For applications where weight-to-capacity ratio matters - tight rigging geometry, offshore work, or any job where a rigger is carrying slings across a long walk - high-tenacity synthetic round slings in HMPE or similar high-modulus fiber offer meaningfully higher capacity at lighter weight than standard polyester. The cover follows the same endless tubular sleeve design; the difference is in what's inside.

Holloway Houston can confirm current availability of high-performance round sling configurations. Contact our team for specific capacity and length requirements.

Custom Round Slings

Standard catalog lengths cover most jobs. When they don't - unusually long reaches, non-standard eye configurations, or specific capacity requirements - Holloway Houston manufactures to order. Custom round slings follow the same manufacturing standards as our catalog product. Lead time and minimum quantities depend on the configuration; call our team to discuss.

Round Slings vs. Web Slings - Not the Same Product

Both are synthetic. Both use polyester. Beyond that, the two are different products designed for different load behaviors.

A web sling is flat - woven polyester webbing, typically 1 to 4 inches wide, with finished edges. The load sees the flat face of the strap. A round sling is tubular - a continuous core of polyester yarn wrapped in a protective sleeve, with no flat face and no edges.

The practical difference comes down to what happens at load contact. A web sling's flat bearing surface works well on loads with flat or wide contact zones. A round sling's tubular body rotates to the rigging angle and conforms around curved or irregular surfaces - the continuous fiber loop shares the load across a wider contact area. That makes round slings the better fit for pipe lifts, rounded machinery housings, and surfaces that a strap edge could mark.

The other difference is configuration flexibility. The endless loop of a round sling sits naturally in a basket or choker hitch and adjusts to the geometry as the load is lifted. The flat body of a web sling stays flat regardless of the rigging angle.

If you're comparing the two for a specific job, the surface geometry and the rigging angle typically point toward one or the other. Holloway Houston stocks both; our team can talk through the application. See web slings

Round Sling Configurations

Round slings are rigged in three basic configurations. Individual product WLL values vary by configuration - the tag on each sling carries all three ratings. No configuration-to-configuration percentage comparisons are stated here; WSTDA RS-1 governs those values per product, and the sling tag is the authoritative source.

Vertical (Straight) Hitch

Both eyes attach to the hook, the sling body runs straight down to the load. The full length of the tubular body bears the load, and the sling sits in its rated geometry without additional tension from wrap or angle. This is the baseline configuration from which choker and basket ratings are derived per the sling's individual certification.

Choker Hitch

One eye threads through the other and cinches around the load. The choker gives the sling a grip on the load that resists rotation and holds irregular shapes. The cinch geometry changes how force distributes through the sling body compared to a straight vertical hang. Individual sling product pages carry the choker WLL for each SKU per WSTDA RS-1 data.

Basket Hitch

Both eyes attach to the hook with the sling body wrapped under the load. The basket hitch shares the load across two legs of the sling body. Lift angle - measured from horizontal - affects how capacity distributes between the two legs. Individual product WLL values and basket hitch ratings are on the product page for each sling. WSTDA RS-1 governs the rating methodology.

Where Round Slings Are Used

Round slings show up wherever a tubular body, conforming fit, and low surface damage risk are more useful than a flat strap. In oil and gas, they handle pipe at the yard and on the rig floor - the sling body conforms around pipe OD without concentrating load on a narrow strip. In manufacturing and heavy industry, machinery rigging puts round slings against machined housings, finished surfaces, and tight lift geometries where marks matter and flat webbing can't be used.

Structural steel fabrication and erection regularly uses round slings for beam picks, plate moves, and column sets. Construction sites pull round slings for precast panels and equipment setting. The sling body's ability to rotate into the rigging angle without twisting or kinking makes it a practical choice when the lift geometry isn't perfectly square.

Holloway Houston serves oil and gas, construction, manufacturing, steel and fabrication, and general industrial accounts from Houston with same-day pickup and national shipping.

Brands We Carry

Holloway Houston manufactures the round slings in this catalog. These are first-party products - designed, made, and certified in-house, not sourced from a third-party manufacturer. When you order from this page, you're buying direct from the manufacturer.

Our catalog focuses on polyester round slings across the WLL color-coding range per WSTDA RS-1 convention. As our product line expands - including high-performance and custom configurations - additional options will be added here. If a specific configuration isn't shown, our team can confirm availability or lead time on manufacturing.

Selection Considerations for Round Slings

Reaching for a round sling comes down to a few variables. None of these replace site-specific lift planning or manufacturer documentation - they're the product-awareness points that inform the conversation.

• WLL and configuration match: Each sling carries three WLL ratings - vertical, choker, and basket. The color on the cover signals the WLL tier per WSTDA RS-1 color-coding convention. The tag on the sling carries the specific values for that product. Match the WLL in the configuration you'll be using - not the highest number on the tag.
• Length: Round slings are measured from eye to eye. The length you need depends on the rigging geometry - reach from the hook to the load, basket wrap requirements, and choker positions. Holloway Houston manufactures to standard lengths and to custom order.
• Surface and load geometry: Round slings are the natural fit for curved or delicate load surfaces. If the load has flat faces and the strap won't create an edge-loading problem, web slings and round slings are often interchangeable by capacity. If the load is round, polished, or has a finish that can be marked, the tubular body of a round sling is worth specifying.
• Environment: Polyester round slings are the general-purpose choice for most industrial environments. For chemical exposure, heat, or unusual environmental conditions, contact Holloway Houston - the right sling depends on what the cover and yarn are going to see.

Round Sling Safety and Awareness

Round slings are load-bearing synthetic lifting slings governed by WSTDA RS-1 (Specifications for Synthetic Round Slings) and referenced in ASME B30.9 (Slings). The following awareness points apply. Use this as a quick checklist only - it does not substitute for training, inspection programs, or manufacturer documentation.

• Round slings carry an identification tag per WSTDA RS-1. The tag shows manufacturer, product identification, WLL in each configuration, and the applicable standard. Slings with missing, unreadable, or detached tags are not available for service.
• The tubular cover protects the load-bearing yarn core. Inspection programs typically look for cuts, tears, burns, abrasion, embedded particles, and chemical discoloration in the cover. Damage to the cover that exposes the yarn core indicates a sling that warrants removal from service for evaluation.
• Polyester yarn is sensitive to certain chemicals, particularly strong acids. The cover's condition after exposure to any unusual chemical environment typically calls for review before returning the sling to service. Manufacturer documentation covers specific chemical exposure guidance for the yarn and cover materials.
• Heat affects synthetic slings. Manufacturer documentation provides the temperature service range for the polyester materials in the sling; working near heat sources, grinding operations, or any elevated-temperature condition warrants review of that guidance.
• WSTDA RS-1 inspection criteria govern periodic and pre-use inspection for synthetic round slings. Holloway Houston offers rigging inspection services for round slings - contact our team for scheduling.

Why Holloway Houston for Round Slings

Holloway Houston has been in the rigging business since 1960. We manufacture round slings - this isn't a catalog category where we're matching a distributor margin against commodity imports. The slings on this page come out of our manufacturing operation, which means direct answers on specifications, lead times, and custom configurations without going back to a vendor.

Houston location means same-day pickup for local accounts and national shipping from stock. Our team stocks the slings alongside the shackles, hooks, and rigging hardware that complete a lift - one source for the assembly, not four vendors.

ISO 9001 certification covers our manufacturing process. For accounts that need documentation - certified slings, traceability, inspection records - that's part of what we carry.

Rigging inspection services for synthetic round slings are available through Holloway Houston. If your slings are due for periodic inspection or you've got a sling that came back from the job with a question mark on it, our inspection team handles it. 250+ employees. B2B accounts and volume pricing available. Contact us for project quantities, blanket orders, or ongoing supply agreements.

Complete Your Rigging Assembly

• Lifting Slings - Web slings, chain slings, and wire rope slings alongside our round sling line.
• Web Slings - Flat polyester webbing slings for loads with flat bearing surfaces and wide contact zones.
• Chain Slings - Alloy chain slings for high-heat and abrasive environments where synthetic slings aren't the right call.
• Rigging Hardware - Shackles, hooks, and master links that complete a synthetic sling assembly.

Did Not Find What You Were Looking For?

Custom lengths, high-performance fiber options, volume orders, or configurations not shown in the catalog , our manufacturing team can confirm what's possible and what the lead time looks like. Contact Us to discuss.

DISCLAIMER

Round slings are synthetic lifting slings governed by WSTDA RS-1 (Specifications for Synthetic Round Slings) and ASME B30.9 (Slings). The information on this page is provided for general product awareness and does not replace qualified engineering judgment, manufacturer documentation, or site-specific lift planning. Ratings and examples here are for safety awareness.

Specifications

• Type: continuous-loop polyester fiber core inside a double-layer polyester jacket
• WLL identification: color-coded jacket per industry convention
• Hitch configurations: vertical, choker, basket, multi-leg per sling tag
• Standards: WSTDA RS-1 for synthetic round slings; ASME B30.9 for slings in overhead lifting

Where Round Slings Typically Fit

Round slings are commonly selected for loads with finished or painted surfaces, equipment that would bruise under point contact of chain or wire rope, and lifts where flexibility around the load matters more than abrasion resistance. Chain slings are the better match for hot surfaces, abrasive edges, or extended high-cycle use.

Brands We Carry

Holloway Houston manufactures polyester round slings in-house in Houston. Round slings ship with WSTDA-compliant tags showing WLL per hitch, material identification, and manufacturer name.