Capacity, Angles, and Selection – Critical Considerations
The lifting capacity of a 4 Leg wire rope bridle sling is significantly influenced by the sling diameter, the specific end fittings used, and most importantly, the angle of the sling legs during the lift. Crucial Safety Principle (ASME B30.9): The 2 Leg Rating Rule Just like with 3 Leg slings, it is extremely difficult to guarantee that all four legs of a bridle sling will share the load equally when lifting a rigid object. Factors like slight variations in leg length, minor shifts in the load's center of gravity, or deflection of the load itself can cause two legs to carry the majority of the force
The lifting capacity of a 4 Leg wire rope bridle sling is significantly influenced by the sling diameter, the specific end fittings used, and most importantly, the angle of the sling legs during the lift. Crucial Safety Principle (ASME B30.9):
Holloway Houston 4 Leg Wire Rope Bridle Slings
| Wire Rope Diameter (inches) | EIPS Capacities In Tons Angle With Horizontal |
Recommended Master Link | Recomm.Shackle Size (inches) |
Recomm. Eye Hooks | Minimum Sling Length | ||||
|---|---|---|---|---|---|---|---|---|---|
| 60 Deg | 45 Deg | 30 Deg | Dia. (inches) |
Width. (inches) |
Length (inches) |
||||
| 1/4” | 2.2 | 1.8 | 1.3 | 1/2” | 2" | 3" | 3/8” | 3/4 ton | 1′-3″ |
| 3/8” | 5 | 4.1 | 2.9 | 3/4” | 3" | 4.5" | 1/2” | 1.5 ton | 1′-8″ |
| 1/2” | 8.8 | 7.1 | 5.1 | 1” | 4" | 6" | 5/8” | 3 ton | 2" |
| 5/8” | 14 | 11 | 7.8 | 1-1/4” | 5" | 7.75" | 3/4” | 5 ton | 2′-4″ |
| 3/4” | 19 | 16 | 11 | 1 1/2” | 6" | 9" | 7/8” | 7 ton | 2′-9″ |
| 7/8” | 26 | 21 | 15 | 1 3/4” | 7" | 10.5" | 1” | 7.5 ton | 3′-3″ |
| 1” | 34 | 28 | 20 | 1 7/8” | 7.5" | 11.25" | 1 1/8” | 10 ton | 3′-6″ |
| 1-1/8” | 42 | 34 | 24 | 2 1/4” | 9" | 13.5" | 1 1/4” | 15 ton | 4' |
| 1-1/4” | 51 | 42 | 30 | 2 1/2” | 10" | 15" | 1 3/8” | 15 ton | 4′-6″ |
| 1-3/8” | 62 | 50 | 36 | 2-3/4” | 11" | 16" | 1 1/2” | 20 ton | 5' |
| 1-1/2” | 73 | 60 | 42 | 2-3/4” | 11" | 16" | 1-3/4" | 22 ton | 5′-6″ |
| 1-3/4” | 98 | 80 | 57 | 4” | 13" | 19.5" | 2 1/2” | 30 ton | 6′-6″ |
| 2” | 127 | 104 | 73 | 4” | 16" | 24" | 2 1/2” | 37 ton | 8' |
| 2-1/4” | 154 | 126 | 89 | N/A | N/A | N/A | 2 1/2” | – | 8′-9″ |
The lifting capacity of a 4 Leg wire rope bridle sling is significantly influenced by the sling diameter, the specific end fittings used, and most importantly, the angle of the sling legs during the lift. Crucial Safety Principle (ASME B30.9):
Holloway Houston 4 Leg Wire Rope Bridle Slings
Holloway Houston 4 Leg Wire Rope Bridle Slings
| Wire Rope Diameter (inches) | EIPS Capacities In Tons Angle With Horizontal |
Recommended Master Link Assembly | Recomm.Shackle Size |
Recomm. Eye Hooks | Minimum Sling Length | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 60 Deg | 45 Deg | 30 Deg | Dia. (inches) |
Width. (inches) |
Length (inches) |
Inside Dia. (inches) | ||||
| 1/4” | 2.2 | 1.8 | 1.3 | N/A | N/A | N/A | N/A | 3/8” | 3/4 ton | 1′-3″ |
| 3/8” | 5 | 4.1 | 2.9 | 3/4” | 3.2 | 6 | 1.77 | 1/2” | 1.5 ton | 1′-8″ |
| 1/2” | 8.8 | 7.1 | 5.1 | 1” | 4.3 | 7.5 | 2.36 | 5/8” | 3 ton | 2 |
| 5/8” | 14 | 11 | 7.8 | 1 1/4” | 5.5 | 9.5 | 3.54 | 3/4” | 5 ton | 2′-4″ |
| 3/4” | 19 | 16 | 11 | 1 1/2” | 5.9 | 10.5 | 3.94 | 7/8” | 7 ton | 2′-9″ |
| 7/8” | 26 | 21 | 15 | 1 3/4” | 6 | 12 | 5 | 1” | 7.5 ton | 3′-3″ |
| 1” | 34 | 28 | 20 | 1 7/8” | 6 | 12 | 5 | 1 1/8” | 10 ton | 3′-6″ |
| 1 1/8“ | 42 | 34 | 24 | 2 1/4” | 7 | 14 | 5.75 | 1 1/4” | 15 ton | 4 |
| 1 1/4” | 51 | 42 | 30 | 2 1/2” | 8.38 | 16 | 8.38 | 1 3/8” | 15 ton | 4′-6″ |
| 1 3/8“ | 62 | 50 | 36 | 2 3/4” | 8.38 | 16 | 8.38 | 1 1/2” | 20 ton | 5 |
| 1 1/2” | 73 | 60 | 42 | 2 3/4” | 9.88 | 18 | 9.88 | 1 3/4” | 22 ton | 5′-6″ |
| 1 3/4“ | 98 | 80 | 57 | 4” | 12 | 24 | 12 | 2 1/2” | 30 ton | 6′-6″ |
| 2” | 127 | 104 | 73 | 4” | 12 | 24 | 12 | 2 1/2” | 37 ton | 8 |
| 2 1/4” | 154 | 126 | 89 | 4” | 12 | 24 | 12 | 2 1/2” | – | 8′-9″ |
The lifting capacity of a 4 Leg wire rope bridle sling is significantly influenced by the sling diameter, the specific end fittings used, and most importantly, the angle of the sling legs during the lift. Crucial Safety Principle (ASME B30.9):
Holloway Houston 4 Leg Wire Rope Bridle Slings
| Wire Rope Diameter (inches) | EIPS Capacities In Tons Angle With Horizontal |
Recommended Pear-Shaped Link | Recomm.Shackle Size |
Recomm. Eye Hooks | Minimum Sling Length | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 60 Deg | 45 Deg | 30 Deg | Dia. (inches) |
Cap. (inches) |
Width (inches) |
Length (inches) |
||||
| 1/4” | 2.2 | 1.8 | 1.3 | 1/2” | 3.15 | 2 | 3 | 3/8” | 3/4 ton | 1′-3″ |
| 3/8” | 5 | 4.1 | 2.9 | 3/4” | 5.59 | 3 | 4.5 | 1/2” | 1.5 ton | 1′-8″ |
| 1/2” | 8.8 | 7.1 | 5.1 | 1” | 11 | 4 | 6 | 5/8” | 3 ton | 2 |
| 5/8” | 14 | 11 | 7.8 | 1 1/4” | 16.4 | 5 | 7.75 | 3/4” | 5 ton | 2′-4″ |
| 3/4” | 19 | 16 | 11 | 1 1/2” | 24.7 | 6 | 9 | 7/8” | 7 ton | 2′-9″ |
| 7/8” | 26 | 21 | 15 | 1 3/4” | 38.6 | 7 | 10.5 | 1” | 7.5 ton | 3′-3″ |
| 1” | 34 | 28 | 20 | 1 7/8” | 43.5 | 7.5 | 11.25 | 1 1/8” | 10 ton | 3′-6″ |
| 1-1/8” | 42 | 34 | 24 | 2 1/4” | 65 | 9 | 13.5 | 1 1/4” | 15 ton | 4 |
| 1-1/4” | 51 | 42 | 30 | 2 1/2” | 66.9 | 10 | 15 | 1 3/8” | 15 ton | 4′-6″ |
| 1-3/8” | 62 | 50 | 36 | 2 3/4” | 98.6 | 11 | 16 | 1 1/2” | 20 ton | 5 |
| 1-1/2” | 73 | 60 | 42 | 2 3/4” | 98.6 | 11 | 16 | 1 3/4 | 22 ton | 5′-6″ |
| 1-3/4” | 98 | 80 | 57 | 3 1/4” | 119 | 13 | 19.5 | 2” | 30 ton | 6′-6″ |
| 2” | 127 | 104 | 73 | 4” | 169 | 16 | 24 | 2 1/2” | 37 ton | 8 |
| 2-1/4” | 154 | 126 | 89 | N/A | N/A | N/A | N/A | 2 1/2” | – | 8′-9″ |
Holloway Houston 4 Leg Wire Rope Bridle Slings
For lifting operations requiring the absolute highest degree of stability and load control, wire rope 4 Leg bridle slings are the premier choice. These robust assemblies, also known as quadruple leg wire rope slings or 4 Leg bridle configurations, are engineered specifically for handling large, heavy loads with four designated lifting points, such as machinery bases, shipping containers, and complex structural components.
What Is a 4 Leg Wire Rope Bridle Sling?
A 4 Leg wire rope bridle sling consists of four identical lengths of high-strength wire rope, all joined at the top by a single, heavy-duty oblong master link or master link sub-assembly. Each of the four legs terminates with a durable fitting, such as a hook, shackle, or thimble, designed to securely attach to the load's pick points. This quadruple-leg design creates an exceptionally stable lifting platform, effectively distributing the load's weight across four points.
This quadruple-leg design distributes the load's weight across four points, providing improved stability and load control. Standard configurations feature equal-length legs for symmetrical loads, while custom unequal-leg assemblies are available for offset lift points or irregular load areas.
Key Features
4 Leg Configuration
4 wire rope legs connected to a central master link assembly for maximum stability
Custom Lengths
Equal or customizable lengths, diameters, and hardware configurations to match lift point area.
Versatile Terminations
Available with hook fittings or thimble-eye terminations for shackle attachment
Certified & Tested
Proof-tested, tagged, and certified to meet ASME B30.9 and OSHA 1910.184 standards
Design and Materials
Holloway Houston’s 4 Leg Wire Rope Bridle Slings are made from Extra Improved Plow Steel (EIPS) wire rope with an Independent Wire Rope Core (IWRC). The EIPS manufacture delivers high tensile strength, while the IWRC design resists crushing and deformation under load. Each sling is internally lubricated during manufacturing to minimize friction and support long-term performance in lifting applications.
Wire Rope Grade & Type
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Holloway Houston 4 Leg bridle slings are manufactured from Extra Improved Plow Steel (EIPS) wire rope with Independent Wire Rope Core (IWRC) for superior tensile strength and crush resistance. Available in bright (uncoated) or galvanized finish depending on environmental requirements, each sling is fully lubricated during manufacturing to reduce internal friction and extend service life.
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EIPS design provides higher tensile capacity than standard wire rope grades, while IWRC prevents internal deformation and maintains rope integrity under heavy loads.
Configurations
The wire rope arrangement depends on the sling diameter to balance strength and flexibility.
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The wire rope design is selected based on sling diameter to balance strength and flexibility.
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6×19 Wire Rope : Used for slings 1 inch or smaller. Provides superior abrasion resistance and stability with balanced flexibility for general lifting applications.
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6×36 Wire Rope : /strong> Used for larger diameter slings. More numerous smaller wires per strand provide greater flexibility and improved resistance to bending fatigue, reducing wear during repeated use.
End Terminations
The sling’s performance relies on the strength of its end terminations. Holloway Houston slings feature.
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Each wire rope leg is finished with high-quality terminations that maintain strength and protect the wire structure during lifts.
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Flemish Eye Splice with Thimble: Each eye is hand-spliced and secured with a swaged steel sleeve to maintain rope strength. A heavy-duty steel thimble protects the rope from wear while maintaining eye shape stability and providing safe connection to shackles or master links.
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Hook Fittings : Available in eye, swivel, and self-locking configurations to suit various rigging requirements. Made from forged alloy steel for safe load attachment and dependable performance.
Advantages of 4 Leg Wire Rope Bridle Slings
While 2 Leg wire rope slings provide basic balance and 3 Leg wire rope slings improve stability for multi-point loads, 4 Leg wire rope bridle slings provides superior load control through four-point attachment. The four-point configuration distributes lifting forces more evenly and provides improved stability compared to 2 Leg or 3 Leg configurations when properly rigged.
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Heavy loads with four designated lifting lugs or structural pick points.
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Applications requiring minimized load rotation and maximum stability.
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Large rectangular or square loads requiring four-corner attachment.
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Tough lifts where load control and redundancy are priorities.
Safety and Care
Maintaining sling integrity is important for safe lifting operations. Routine inspection and proper handling extend service life and maintain safe lifting performance. Follow ASME B30.9 inspection requirements before each use.
Best Practices :
Inspect Before Each Use : Visually check each leg, the master link, and all end fittings for broken wires, kinks, crushing, corrosion, heat damage, or excessive wear.
Safe Angles : Maintain sling angles of 30° or greater from horizontal. Capacity decreases significantly below 30°
Remove from Service : Any sling showing damage per ASME B30.9 removal criteria must be immediately removed from service.
Protect from Damage : Use corner protection or softeners when lifting loads with sharp edges to prevent cutting or abrasion. Avoid chemical exposure and excessive heat.
Proper Storage : Store slings on racks in clean, dry conditions away from floor contact, extreme temperatures, and corrosive substances.
Training : Make sure all rigging personnel are properly trained on sling selection, inspection, and safe use practices per ASME B30.9 and OSHA 1910.184 requirements.
Maximize workplace safety with proper training.
Safety and Care
Maintaining the integrity of your slings is essential for safety.
Best Practices :
- Inspect Before Each Use : Visually check each leg, the master link, and all end fittings for broken wires, kinks, crushing, corrosion, heat damage, or excessive wear. Verify the tag is present and legible.
- Protect from Damage : Use sling protection pads when lifting loads with sharp edges to prevent cutting or abrasion. Avoid chemical exposure.
- Proper Storage : Store slings on a rack in a clean, dry environment, away from extreme temperatures and corrosive substances.
- Safe Angles : Never use bridle slings at angles less than 30° from the horizontal.
- Training : Ensure all personnel involved in rigging operations are properly trained on sling selection, inspection, and safe use practices.
Capacity, Angles, and Selection – Key Factors
Safety Guideline (ASME B30.9): The Two-Leg Rating Rule
When lifting rigid or uneven loads, it is difficult for all four legs of the sling to share the weight evenly. Small variations in leg length, shifts in the load's center of gravity, or movement during lifting can cause two legs to carry more of the load.
To maintain safe lifting practice, ASME B30.9 specifies that 4 Leg bridle slings should be rated using the capacity of only two legs at the planned sling angle. This provides a safety margin in case of uneven load distribution.
Angle Impact on Capacity
As the leg angle from horizontal decreases, tension on each leg increases, which reduces the total lifting capacity.
Critical: Maintain angles ≥ 30° from horizontal
Capacity decreases significantly below 30° - always verify your working angle meets requirements
Key Factors
The lifting capacity depends on multiple interconnected factors:
Wire Rope Diameter
Larger diameters provide higher capacity.
End Fitting Type
Different terminations affect load capacity.
Sling Leg Angle
Critical factor - capacity decreases as angle decreases
Technical Features and Customization
Holloway Houston 4 Leg bridle slings are made for performance and consistency.
Precision Flemish Splicing
Hand-spliced eyes secured with swaged steel sleeves under hydraulic pressure for maximum strength and reliability.
Study Wire Rope
EIPS with IWRC construction provides superior tensile strength and crush resistance. Available in bright or galvanized finish. Fully lubricated for extended service life.
Versatile End Terminations
Available with eye hooks (latched or plain), swivel hooks, self-locking hooks, or thimble-eye terminations for connection via shackles or master links.
Compliance Tagging
Metal or vinyl identification tags provided per ASME B30.9 requirements showing rated capacity, sling specifications, and serial number.
Selecting the Right Sling for Your Application
Choosing the correct 4 Leg bridle requires careful consideration of the load and lifting environment.
Load Analysis
Accurately determine the load's weight, dimensions, center of gravity, and the precise location of all four lifting points.
Environmental Factors
Specify galvanized or stainless steel wire rope if operating in marine, offshore, or corrosive environments.
Compliance Needs
Verify project-specific certification or domestic sourcing requirements.
Hardware Compatibility
Make sure the master link fits your crane hook and the end terminations are compatible with the load's attachment points.
Capacity Calculation
Select a sling diameter with a Working Load Limit (based on the 2 Leg rating per ASME B30.9) that exceeds the calculated tension at your planned lifting angle from horizontal.
D/d Ratio Check
Ensure the connection points (pins, hooks, lugs) have a diameter at least four times the wire rope diameter (D/d ≥ 4) to avoid reducing the sling's rated capacity due to tight bending radius.
Selecting the Right Sling for Your Application
Choosing the correct 4 Leg bridle requires careful consideration of the load and lifting environment.
- Load Analysis
Accurately determine the load's weight, dimensions, center of gravity, and the precise location of all four lifting points. - Capacity Calculation
Select a sling diameter with a WLL (based on the 2 Leg rating) that exceeds the calculated tension at your planned lifting angle. - Hardware Compatibility
Ensure the master link fits your crane hook and the end fittings are compatible with the load's attachment points. Check pin diameters for shackles.
- Environmental Factors
Specify galvanized or stainless steel wire rope if operating in marine, offshore, or corrosive environments. - Compliance Needs
Verify your project requires specific certifications or domestic sourcing. - D/d Ratio Check
Ensure the connection points (pins, hooks, lugs) have a diameter at least four times the wire rope diameter (D/d ≥ 4) to avoid reducing the sling's rated capacity due to tight bending radius.
Custom Solutions and Ordering
Holloway Houston provides custom-fabricated 4 Leg bridle slings tailored to specific requirements:
Material Choices
Galvanized or stainless steel wire rope available for corrosion resistance in harsh environments.
Custom Configurations
Specify exact lengths (equal or unequal), larger diameters, or non-standard end fittings and master links.
Technical Documentation
Complete certification packages and proof test documentation available.
Contact us to discuss your lifting requirements and receive a quote for custom 4 Leg wire rope bridle slings.
Quality and Compliance
Every Holloway Houston 4 Leg bridle sling is manufactured, inspected, and proof-tested in accordance with ASME B30.9 and OSHA 1910.184 standards. Each sling is permanently tagged with:
- Working Load Limit (WLL) for applicable sling angles (typically 60°, 45°, 30° from horizontal).
- Sling length and wire rope diameter.
- Unique serial number for complete traceability to material certifications and test records.
- Manufacturer identification (Holloway Houston).
- Essential care and operational warnings.
All slings are proof-tested to 2× the vertical WLL and designed with a minimum 5:1 design factor, meaning the sling's breaking strength is at least five times its rated Working Load Limit.
Standards Met :
- ASME B30.9
- OSHA 1910.184
Inspection, Tagging, and Compliance :
- Each sling is proof-tested to twice the WLL per ASME B30.9 requirements.
- Serialized tags and complete documentation provide full product traceability.
- Test certificates documenting proof testing to 2× vertical WLL available upon request.
Holloway Houston wire rope bridle slings are designed and documented to meet strict industry safety and quality requirements. Each sling is fitted with a sturdy metal or vinyl identification tag per ASME B30.9 standards.
All 4 Leg wire rope bridle slings are designed and fabricated entirely in-house at Holloway Houston, ensuring complete control over quality, materials, and performance. By producing our slings internally, we guarantee that every component, from wire rope selection to master links and end fittings, meets our stringent safety and durability standards.
Full In-House Fabrication
Every sling is built from start to finish in our facility, with careful attention to detail at each stage.
High-Quality Materials
We use EIPS wire rope with IWRC cores, premium master links, and carefully swagged fittings to maintain consistency and strength.
Rigorous Testing
Each sling is proof-tested, inspected, and certified to meet ASME B30.9 and OSHA 1910.184 standards.
Traceability and Certification
All slings carry a unique serial number and permanent tag, ensuring full traceability back to material certificates and test records.
Applications and Use Cases
The superior stability of 4 Leg wire rope bridle slings makes them indispensable in numerous critical lifting scenarios across various industries:
Marine
Industrial
Mining
Offshore Platforms
Military
Theatrical Rigging
Construction
Outdoor Recreational
Utility
Heavy Lifting
Why Choose Holloway Houston for 4 Leg Wire Rope Slings?
Holloway Houston is more than a supplier; we are your expert partner in safe and efficient lifting.
Unmatched Fabrication Expertise
Every sling is built in-house to exacting standards by certified technicians.
Certified Quality & Compliance
ISO 9001 certified, ensuring every sling meets ASME B30.9 and OSHA requirements.
Complete Traceability
Serialized tags and full documentation provide confidence and support your safety program.
In-Depth Technical Support
Our knowledgeable team guides you to the perfect sling configuration for your specific lift.
Proven Industry Experience
Decades serving the most demanding sectors, including offshore, construction, and heavy manufacturing.
Reliability Under Load
Our slings are engineered for consistent strength, stability, and long service life.
Tailored Custom Solutions
We deliver precisely what you need, from unique lengths to specialized materials and fittings.
Responsive Project Support
Fast quotes, reliable lead times, and comprehensive assistance from selection to delivery.
Reliable Performance
Designed for consistent strength and stability under load.