Alloy Chain Slings - Grade 80 and Grade 100
Holloway Houston manufactures alloy chain slings in Grade 80 and Grade 100, single-leg through four-leg configurations, with Working Load Limits from 1 ton through over 100 tons per sling assembly. Our chain slings are manufactured in Houston at one of the largest single-location sling shops in the country and tested on our own load-verification beds before shipment. Every sling ships with its ID tag, WLL markings, and manufacturer identification.
Holloway Manufactured Chain Slings for Heavy Lifting
Holloway Houston Inc. (HHI) is a premier manufacturer of high-performance chain slings, engineered to meet the most demanding lifting requirements in the world’s toughest industries. Operating out of the nation's largest single-location sling shop and testing facility in Houston, Texas, we don't just sell equipment—we build it.
Every Holloway chain sling is fabricated in-house using Grade 100 alloy steel, providing a 25% higher strength-to-weight ratio than traditional Grade 80. Our inventory supports chain diameters from 1/4" to 1-1/2", available in single, double, triple, and quad-leg configurations.
Safety is our non-negotiable standard. Every sling we manufacture is proof-tested to 2x its vertical working load limit (WLL) in our NRTL-accredited laboratory before it leaves our facility. Whether you need a standard assembly or a custom-engineered lifting solution, our slings are fully compliant with OSHA 1910.184, ASME B30.9, and NACM standards .
Chain Sling Configurations
Choosing the right configuration is essential for load stability and rigger safety. Holloway provides the following standard builds:
Single-Leg Chain Slings
The single-leg chain sling is the most common tool for direct vertical lifts. Ideal for loads with a single, centered attachment point, these slings are lightweight and easy to handle. They are frequently used in construction for pipe handling and small machinery moves.
Double-Leg Chain Slings
Featuring two legs attached to a single master link, these 2 leg chain slings provide the lateral stability required for balanced, symmetrical loads. By distributing weight across two points, they allow for higher capacities and safer control during transit.
Triple-Leg and Quad-Leg Chain Slings
Designed for heavy, irregular, or asymmetrical loads, our 3-leg and 4-leg (bridle) slings provide maximum stability. These configurations are the "workhorses" of the oilfield and heavy manufacturing sectors, capable of lifting massive modules and large-scale equipment.
Adjustable Chain Slings
For loads with uneven centers of gravity, our adjustable chain slings feature integrated shortening clutches. This allows the rigger to adjust the reach of each leg independently, ensuring the load remains level even when attachment points are at different heights.
Specifications
- Chain grade: Grade 80 (standard alloy) or Grade 100 (higher WLL at the same chain diameter).
- Leg configurations: single-leg (SOL), two-leg (DOS), three-leg (TOS), and four-leg (QOS) assemblies.
- Chain diameters: 1/4" through 1-1/4" across the Grade 80 and Grade 100 product range.
- Hitch configurations: vertical, choker, and basket. Multi-leg slings rated at specified leg-to-vertical angles per sling tag.
- Standards reference: ASME B30.9 for chain slings in overhead lifting; OSHA 29 CFR 1910.184 for general industry sling use.
- Markings: ID tag shows grade, chain diameter, reach, WLL per hitch, and manufacturer identification.
Chain Sling Capacity Chart — Grade 100
Below are the rated capacities for our most common Grade 100 chain sizes.
| Chain Size | Single Vertical (lbs) | Double 60° (lbs) | Triple/Quad 60° (lbs) |
|---|---|---|---|
| 1/4" | 4,300 | 7,400 | 11,200 |
| 3/8" | 8,800 | 15,200 | 22,800 |
| 1/2" | 15,000 | 26,000 | 39,000 |
| 5/8" | 22,600 | 39,100 | 58,700 |
Note: Capacities shown are at rated sling angles. Reduce rated capacity by 20% for choker hitch applications. Never use chain slings at angles less than 30 degrees from horizontal.
Grade 80 vs Grade 100 Chain Slings
While both grades are approved by ASME B30.9 for overhead lifting, Holloway has moved to Grade 100 as our manufacturing standard. Grade 100 chain offers a significant ergonomic advantage: it provides 25% more lifting capacity for the same chain diameter as Grade 80. This means your rigging team can use a lighter, smaller chain to do the same job, reducing fatigue and the risk of onsite injuries. Grade 80 remains a reliable choice for specific legacy applications, but Grade 100 is the industry-leading choice for modern safety and efficiency.
Industries and Applications
Chain slings are the preferred rigging choice when environmental factors would destroy synthetic or wire rope alternatives. They excel in:
- Steel Erection: Handling abrasive beams and plates.
- Foundries: Operating in high-heat environments where synthetic webbing would melt.
- Marine & Shipbuilding: Resisting the rigors of heavy dockside and offshore lifts.
- Oil & Gas: Surviving the rough handling of drill site operations.
Where Chain Slings Typically Fit
Chain slings are commonly selected for loads with sharp edges, abrasive surfaces, hot surfaces, or contact conditions that would damage synthetic slings. The alloy steel chain holds up to edge wear and thermal exposure better than polyester or nylon webbing. Multi-leg configurations handle loads where the pickup points require more than one attachment.
Grade 100 chain slings carry a higher WLL at the same chain diameter than Grade 80, useful where space around the load limits the chain size that fits. Grade 80 and Grade 100 components are not interchangeable in an assembly: the lower-grade component governs the rated WLL. Manufacturer documentation for the specific sling covers the rated WLL for each hitch configuration and leg angle.
Brands We Carry
Holloway Houston manufactures our alloy chain slings in-house using Grade 80 and Grade 100 alloy chain and compatible hardware from established OEM sources, master links, grab hooks, sling hooks, and foundry hooks. Sling assemblies are produced and tested at our Houston facility, with each assembly tagged per ASME B30.9 marking requirements.
Why Buy Direct from Holloway — America's Chain Sling Manufacturer
When you buy from Holloway, you are skipping the middleman and working directly with the fabricator.
- Nation's Largest Facility: Our Houston shop houses the largest inventory and most advanced testing beds in the country, capable of proof-loading up to 2,000,000 lbs.
- Same-Day Fabrication: We understand that downtime costs money. We offer same-day fabrication for most standard configurations.
- Repair & Recertification: Unlike other sling types, chain slings can often be repaired. We provide full inspection, link replacement, and recertification services to extend the life of your investment.
Frequently Asked Questions About Chain Slings
A chain sling is a lifting device made from alloy steel chain links with attached end fittings like hooks or master links. They are used for overhead lifting and are valued for their durability and resistance to heat and abrasion.
Capacity is determined by the chain size, the grade of the steel (Grade 100 vs. 80), and the angle of the lift. A 1/2" Grade 100 single-leg sling is rated for 15,000 lbs in a vertical lift.
Per OSHA 1910.184, slings must be visually inspected by a competent person daily before use. A thorough, documented inspection must be performed at least annually.
Yes. Damaged links, hooks, or master links can be replaced by a qualified manufacturer. Holloway provides comprehensive repair and recertification services at our Houston facility.
Grade 100 slings can operate up to 400°F without any loss in capacity. They can be used up to 1,000°F, though significant capacity reductions must be applied according to manufacturer guidelines.
Grade 80 and Grade 100 refer to the alloy steel strength grade of the chain links. Grade 100 chain slings carry a higher published Working Load Limit at the same chain diameter than Grade 80. Grade 80 and Grade 100 components are not interchangeable in a sling assembly — the lower-grade component governs the assembly rating. The chain tag identifies the grade for a specific sling.
Single-leg slings are for simple vertical picks. Two-leg slings balance symmetrical loads. Quad-leg slings are best for irregular or heavy loads, though it is important to note that a quad-leg sling is rated the same as a triple-leg, as only three legs typically bear the load at once.
Inspection programs typically look for cracks, nicks, gouges, bent or twisted links, heat damage, stretched links, and unreadable identification tags. Published ASME B30.9 inspection criteria and the sling manufacturer's documentation are the references for specific wear and removal thresholds. Holloway Houston's rigging inspection services handle documented inspections for customers managing inspection cycles.
Chain sling selection starts with the load weight, the number of legs needed, the hitch type (vertical, choker, basket, or multi-leg), and the working reach from master link to hook. Chain grade and diameter are then matched to the WLL needed. Holloway Houston's rigging specialists can verify grade, reach, and hardware match for a specific application.
