High Strength Galvanized Steel Wire Strand for Overhead Power Lines and Utility Applications
GSW Galvanized Steel Wire Strand providing high-quality galvanized steel wire strands according to BS 183 standards for overhead transmission lines, grounding systems, telecommunication networks, and utility construction projects.
Implementation Standards
- BS 183
Product Introduction
GSW Galvanized Steel Wire Strand Manufacturer & Supplier in China
Galvanized Steel Wire Strand (GSW) high carbon steel wires with a uniform zinc coating, providing excellent mechanical strength, corrosion resistance, and long-term durability in outdoor environments.
What Is Galvanized Steel Wire Strand (GSW)?
Galvanized Steel Wire Strand (GSW) is a stranded steel wire product consisting of multiple galvanized steel wires twisted together to form a strong and flexible mechanical conductor.
The zinc coating protects the steel core from corrosion, while the stranded structure improves tensile strength, flexibility, and installation performance.
GSW is widely used as:
- Overhead ground wire (earth wire)
- Messenger wire for aerial cable systems
- Supporting wire for communication cables
- Stay wire for utility poles
- Guy wire for transmission structures
- Mechanical reinforcement component
Compared with ordinary steel wire, galvanized steel wire strand provides significantly improved corrosion resistance and service life, making it suitable for harsh outdoor environments.
GSW Construction and Manufacturing
1. Steel Wire Material
Sitong Cable uses high-quality carbon steel wire as the raw material. The steel wire is processed through:
- Wire drawing
- Heat treatment
- Surface cleaning
- Hot-dip galvanizing
- Stranding process
The finished steel wire achieves excellent tensile performance and dimensional accuracy.
2. Galvanized Coating
The steel wires are coated with zinc through a galvanizing process.
The zinc layer provides:
- Superior corrosion protection
- Resistance against moisture and oxidation
- Longer outdoor service life
- Improved reliability in coastal and industrial areas
3. Stranding Structure
GSW is manufactured by twisting multiple galvanized steel wires together.
Common constructions include:
- 3-wire strand
- 7-wire strand
- 19-wire strand
The stranded design provides:
- High tensile strength
- Better flexibility
- Easy installation
- Improved mechanical stability
Technical Specifications of GSW (BS 183)
| Item | Description |
|---|---|
| Product Name | Galvanized Steel Wire Strand |
| Standard | BS 183:1972 |
| Material | Galvanized High Carbon Steel Wire |
| Structure | Multi-wire stranded construction |
| Surface | Zinc coated |
| Application | Overhead lines, grounding, messenger wire |
| Diameter Range | Customized according to requirements |
| Tensile Strength | Available according to project requirements |
| Zinc Coating | Uniform galvanized coating |
| Packing | Wooden drum / Steel drum / Customized packing |
| --- |
Features and Advantages of GSW
Excellent Corrosion Resistance
The galvanized zinc coating protects the steel wire from rust and environmental damage, ensuring reliable operation under outdoor conditions.
High Mechanical Strength
GSW provides strong tensile performance, making it suitable for supporting overhead cables and utility structures.
Long Service Life
The combination of high-strength steel and protective zinc coating ensures durability for long-term infrastructure applications.
Flexible Installation
The stranded structure allows easier handling, bending, and installation compared with solid steel wire.
Custom Manufacturing Capability
Sitong Cable can supply customized:
- Wire diameter
- Strand configuration
- Tensile grade
- Zinc coating thickness
- Drum size
according to customer requirements.
Applications of Galvanized Steel Wire Strand
Overhead Power Transmission Lines
GSW is commonly used as:
- Overhead ground wire support
- Lightning protection conductor support
- Mechanical reinforcement component
Aerial Bundled Cable (ABC) Systems
GSW can be used as messenger wire to provide mechanical support for aerial cables.
Related products:
- ABC Cable
- Low Voltage Power Cable
- Overhead Conductors
Telecommunication Networks
Galvanized steel wire strand is widely used for:
- Fiber optic cable support
- Communication cable suspension
- Pole line construction
Utility Pole Structures
GSW is commonly applied as:
- Stay wire
- Guy wire
- Structural reinforcement wire
Why Choose Sitong Cable as Your GSW Supplier?
Professional Cable Manufacturer
Sitong Cable specializes in manufacturing overhead conductors, power cables, and supporting wire products for global markets.
Strict Quality Control
Every batch of galvanized steel wire strand is inspected for:
- Diameter accuracy
- Tensile strength
- Zinc coating quality
- Surface condition
- Mechanical performance
Global Supply Experience
Our products are exported to multiple international markets, supporting power distribution, telecommunications, and infrastructure projects.
OEM & Customized Service
We provide:
- Customized specifications
- Private labeling
- Flexible packaging
- Technical support
GSW vs Other Steel Wire Products
| Product | Main Feature | Typical Application |
|---|---|---|
| Galvanized Steel Wire Strand (GSW) | High strength + corrosion resistance | Ground wire, messenger wire |
| Steel Wire | Basic steel product | General mechanical use |
| ACSR Steel Core Wire | Reinforcement inside conductor | Overhead transmission conductor |
| Stainless Steel Wire | Maximum corrosion resistance | Special environments |
Quality Standards
Produce galvanized steel strands according to international requirements including:
- BS 183:1972 General Purpose Galvanized Steel Wire Strand,ASTM A475 Zinc-Coated Steel Wire Strand
- Customer-specific technical specifications
- International utility project requirements
Frequently Asked Questions (FAQ)
What is GSW cable used for?
GSW (Galvanized Steel Wire Strand) is mainly used as overhead ground wire, messenger wire, stay wire, and mechanical support wire for power and communication networks.
What standard does galvanized steel wire strand follow?
General purpose galvanized steel wire strand is commonly manufactured according to BS 183 requirements.
Is GSW suitable for outdoor applications?
Yes. The galvanized zinc coating provides excellent corrosion protection, making GSW suitable for outdoor environments.
Can Sitong Cable provide customized GSW sizes?
Yes. Sitong Cable can manufacture customized strand structures, diameters, tensile grades, and packaging solutions according to customer requirements.
What is the difference between GSW and ACSR?
GSW is mainly used for mechanical support and grounding applications, while ACSR is an aluminum conductor reinforced with a steel core and used for electrical power transmission.
Technical Specifications
Construction, Grades and Minimum Breaking Loads of General Purpose Galvanized Steel Wire Strand
| Construction Number of wires wire diameter | Approximate strand diameter* mm | Minimum breaking load of strand | Approx.† mass kg/1000m | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Grade 350 kN | Grade 480 kN | Grade 700 kN | Grade 850 kN | Grade 1000 kN | Grade 1150 kN | Grade 1300 kN | |||
| 3/1.80 | 3.9 | 2.65 | 3.66 | — | — | — | — | — | 60 |
| 3/2.65 | 5.7 | 5.80 | 7.95 | — | — | — | — | — | 130 |
| 3/3.25 | 7.0 | 8.70 | 11.95 | — | — | — | — | — | 195 |
| 3/4.00 | 8.6 | 13.20 | 18.10 | — | — | — | — | — | 295 |
| 4/1.80 | 4.4 | 3.55 | 4.90 | — | — | — | — | — | 80 |
| 4/2.65 | 6.4 | 7.70 | 10.60 | — | — | — | — | — | 172 |
| 4/3.25 | 7.9 | 11.60 | 15.90 | — | — | — | — | — | 260 |
| 4/4.00 | 9.7 | 17.60 | 24.10 | 35.20 | — | — | — | — | 390 |
| 5/1.50 | 4.1 | 3.10 | 4.24 | 6.18 | — | — | — | — | 69 |
| 5/1.80 | 4.9 | 4.45 | 6.10 | 8.90 | — | — | — | — | 95 |
| 5/2.65 | 7.2 | 9.65 | 13.25 | 19.30 | — | — | — | — | 220 |
| 5/3.25 | 8.8 | 14.50 | 19.90 | 29.00 | — | — | — | — | 320 |
| 5/4.00 | 10.8 | 22.00 | 30.15 | 43.95 | — | — | — | — | 490 |
| 7/0.56 | 1.7 | 0.60 | 0.83 | 1.20 | — | 1.70 | 1.98 | 2.24 | 14 |
| 7/0.71 | 2.1 | 0.97 | 1.33 | 1.94 | — | 2.75 | 3.19 | 3.60 | 28 |
| 7/0.85 | 2.6 | 1.39 | 1.90 | 2.80 | — | 3.95 | 4.57 | 5.15 | 31 |
| 7/0.90 | 2.7 | 1.55 | 2.14 | 3.10 | — | 4.45 | 5.12 | 5.80 | 35 |
| 7/1.00 | 3.0 | 1.92 | 2.64 | 3.85 | — | 5.50 | 6.32 | 7.15 | 43 |
| 7/1.25 | 3.8 | 3.01 | 4.10 | 6.00 | — | 8.55 | 9.88 | 11.15 | 67 |
| 7/1.40 | 4.2 | 3.75 | 5.17 | 7.54 | 9.16 | 10.75 | 12.35 | 14.00 | 84 |
| 7/RS‡ | 4.3 | 3.85 | 5.28 | 7.70 | 9.35 | 11.00 | 12.65 | 14.30 | 86 |
Galvanized Steel Wire Strand Minimum Breaking Load and Construction Parameters
| Construction Number of wires / wire diameter | Approximate strand diameter* mm | Minimum breaking load of strand | Approx.† mass kg/1000m | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Grade 350 kN | Grade 480 kN | Grade 700 kN | Grade 850 kN | Grade 1000 kN | Grade 1150 kN | Grade 1300 kN | |||
| 7/1.60 | 4.8 | 4.90 | 6.75 | 9.85 | 11.95 | 14.10 | 16.20 | 18.30 | 110 |
| 7/1.80 | 5.4 | 6.23 | 8.55 | 12.45 | — | 17.80 | 20.50 | 23.20 | 140 |
| 7/2.00 | 6.0 | 7.70 | 10.55 | 15.40 | — | 22.00 | 25.30 | 38.60 | 170 |
| 7/2.36 | 7.1 | 10.70 | 14.70 | 21.40 | — | 30.60 | 35.20 | 39.80 | 240 |
| 7/2.65 | 8.0 | 13.50 | 18.50 | 27.00 | — | 38.60 | 44.40 | 50.20 | 300 |
| 7/3.00 | 9.0 | 17.30 | 23.75 | 34.65 | — | 49.50 | 56.90 | 64.30 | 392 |
| 7/3.15 | 9.5 | 19.10 | 26.20 | 38.20 | — | 54.55 | 62.75 | 70.90 | 430 |
| 7/3.25 | 9.8 | 20.30 | 27.85 | 40.65 | — | 58.05 | 66.80 | 75.50 | 460 |
| 7/3.65 | 11.0 | 25.60 | 35.15 | 51.25 | — | 73.25 | 84.20 | 95.20 | 570 |
| 7/4.00 | 12.0 | 30.90 | 42.20 | 61.60 | — | 88.00 | 101.0 | 114.0 | 690 |
| 7/4.25 | 12.8 | 34.75 | 47.65 | 69.50 | — | 99.30 | 114.0 | 129.0 | 780 |
| 7/4.75 | 14.0 | 43.40 | 59.45 | 86.80 | — | 124.0 | 142.7 | 161.3 | 970 |
| 19/1.00 | 5.0 | 5.22 | 7.16 | 10.45 | — | 14.92 | 17.16 | 19.40 | 120 |
| 19/1.25 | 6.3 | 8.16 | 11.19 | 16.32 | — | 23.32 | 26.81 | 30.31 | 180 |
| 19/1.40 | 7.0 | 10.24 | 14.04 | 20.47 | — | 29.25 | 33.64 | 38.02 | 230 |
| 19/1.60 | 8.0 | 13.37 | 18.34 | 26.75 | — | 38.20 | 43.93 | 49.66 | 300 |
| 19/2.00 | 10.0 | 20.90 | 28.65 | 41.78 | 50.74 | 59.69 | 68.64 | 77.60 | 470 |
| 19/2.50 | 12.5 | 32.65 | 44.80 | 65.29 | 79.28 | 93.27 | 107.3 | 121.3 | 730 |
| 19/3.00 | 15.0 | 47.00 | 64.50 | 94.00 | 114.1 | 134.3 | 154.5 | 174.6 | 1050 |
| 19/3.55 | 17.8 | 65.80 | 90.27 | 131.6 | 159.9 | 188.0 | 216.3 | 244.5 | 1470 |
| 19/4.00 | 20.0 | 83.55 | 114.6 | 167.1 | 203.0 | 238.7 | 274.6 | 310.4 | 1870 |
| 19/4.75 | 23.8 | 117.85 | 161.6 | 235.7 | 286.0 | 336.7 | 387.2 | 437.7 | 2630 |
Application Fields
Overhead ground wire support
Lightning protection conductor support
Mechanical reinforcement component
Packaging & Shipping
All cables will be packaged in different materials based on their outer diameter and net weight, and can be customized according to requirements
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