UltrexSL
Single Braid
UltrexSL is a 12-strand premium HMPE rope purpose-built for the Electric Utility and Transmission Industry. Manufactured in the USA using premium Dyneema® SK-75 fiber, UltrexSL combines exceptional tensile strength with an extremely lightweight construction, making it ideal for long-distance conductor pulling and demanding transmission projects.
UltrexSL
UltrexSL is a 12-strand premium HMPE rope purpose-built for critical utility stringing line applications in the Electric Utility and Transmission Industry.
Engineered specifically for compatibility with industry-standard stringing equipment, UltrexSL is dimensionally calibrated to perform smoothly through conventional sheaves, pullers, tensioners, and pilot line systems. Its lightweight design simplifies aerial deployment while its low-stretch construction provides precise tension control and predictable sagging during conductor installation. Available in continuous lengths of 6,000 feet or greater and in diameters of 7/16″, 1/2″, and 5/8″, UltrexSL delivers dependable performance for the most demanding utility stringing operations.
Additional features of UltrexSL include:
Engineered for Utility Stringing Applications: Specifically designed for critical high-strength stringing line applications in overhead transmission and distribution construction, providing reliable performance on long-run conductor installations.
Exceptional Strength-to-Weight Ratio: Manufactured with premium Dyneema® SK-75 HMPE fiber, UltrexSL offers extremely high tensile strength while remaining significantly lighter than traditional stringing lines, improving handling and reducing deployment effort.
Calibrated for Standard Equipment: Rope diameter and construction are engineered to ensure smooth operation through industry-standard sheaves, pullers, tensioners, and other utility stringing equipment, helping reduce equipment wear and maintain consistent performance.
Low Stretch for Precise Tensioning: HMPE construction minimizes elongation under load, allowing crews to achieve controlled sagging, accurate conductor placement, and improved tension management throughout the pull.
Long Continuous Lengths: Available in standard lengths of 6,000 feet or greater to accommodate extended transmission projects while minimizing splices and improving installation efficiency.
Made in the USA: Proudly manufactured in the United States using premium Dyneema® SK-75 fiber to deliver consistent quality, durability, and performance for critical utility applications.
UltrexSL Splicing Instructions
Approved Splice Technique: #10015112, #10018009.
High Performance Single Braid – Eye Splice
High Performance Single Braid – End for End Splice
UltrexSL Specifications and Data
| Diameter (in) | Spliced Minimum Breaking Strength (lbf)* | Unspliced Minimum Breaking Strength (lbf)** | Average Breaking Strength (lbf) | Weight (lb/100ft) |
|---|---|---|---|---|
| 7/16 | 23,500 | 25,500 | 26,500 | 4.5 |
| 1/2 | 33,500 | 36,500 | 37,500 | 6.4 |
| 5/8 | 47,500 | 52,000 | 53,000 | 9.2 |
| Diameter (mm) | Spliced Minimum Breaking Strength (kg)* | Unspliced Minimum Breaking Strength (kg)** | Average Breaking Strength (kg) | Weight (kg/100m) |
|---|---|---|---|---|
| 11 | 10,500 | 11,500 | 12,000 | 6.7 |
| 13 | 15,000 | 16,500 | 17,000 | 9.5 |
| 16 | 21,500 | 23,500 | 24,000 | 13.7 |
Working Details
Green working 318 ft. lbs./lb.
Red ultimate 8,300 ft. lbs./lb.
Dielectric Strength
The maximum allowable leakage for clean, dry UltrexSL is 75 micro-amperes when tested at 100kV per Yale Method 712-1701 Rev 1 “Routine Production Test.” Absorbed and entrained moisture or impurities will increase rope’s conductivity dramatically.
