-International standard type of wire rope
Line Contact Steel Wire Rope Structures
🔹 What is Line Contact Structure
Line contact wire rope refers to a construction where adjacent wires contact each other along a line rather than at points.
Key advantages:
- Larger contact area between wires
- Reduced internal wear
- Higher fatigue resistance
- Longer service life
- Better performance under bending and repeated load
🔹 Core Types
- FC (Fiber Core)
Provides flexibility and lubrication retention, suitable for lighter loads - IWRC (Independent Wire Rope Core)
Steel core, offering higher strength, better crush resistance, and improved stability
🔹 Structure Types Explanation
1. 6×25Fi + FC / IWRC
Strand construction: (1+6+6F+12)
Description:
- Fill wire (Fi) construction with small wires filling gaps between larger wires
- Smooth outer surface and improved contact between wires
Features:
- Good flexibility
- Balanced strength and wear resistance
- Reduced internal friction
Typical applications:
- General lifting
- Hoisting equipment
2. 6×26WS + FC / IWRC
Strand construction: (1+5+5/5+10)
Description:
- Warrington-Seale (WS) construction combining different wire diameters
- Outer layer consists of alternating large and small wires
Features:
- Higher abrasion resistance
- Better structural stability
- Moderate flexibility
Typical applications:
- Construction machinery
- Medium-duty cranes
3. 6×29Fi + FC / IWRC
Strand construction: (1+7+7F+14)
Description:
- Higher wire count fill wire construction
- Denser structure than 6×25Fi
Features:
- Increased strength
- Improved fatigue resistance
- Better load distribution
Typical applications:
- Heavy lifting
- Repetitive bending conditions
4. 6×31WS + FC / IWRC
Strand construction: (1+6+6/6+12)
Description:
- Advanced WS structure with higher wire count
- Optimized balance between flexibility and strength
Features:
- Excellent fatigue resistance
- Good flexibility
- Suitable for dynamic loading
Typical applications:
- Tower cranes
- Hoisting systems
5. 6×36WS + FC
Strand construction: (1+7+7/7+14)
Description:
- High wire count WS construction
- Fine outer wires improve bending performance
Features:
- Superior flexibility
- Excellent fatigue resistance
- Smooth operation over sheaves
Typical applications:
- Mobile cranes
- High-cycle lifting systems
🔹 Summary
| Structure | Flexibility | Strength | Wear Resistance | Fatigue Resistance |
|---|---|---|---|---|
| 6×25Fi | Medium | Medium | Medium | Medium |
| 6×26WS | Medium | Medium | High | Medium |
| 6×29Fi | Medium | High | Medium | High |
| 6×31WS | High | Medium | High | High |
| 6×36WS | Very High | Medium | High | Very High |
| GT Model | Approx. Standard Structure | Structure Type | Core Type | Features | Typical Application |
|---|---|---|---|---|---|
| GT4Z | 6×19 / 6×25 | Line contact (compact) | FC / IWRC | Higher strength, low rotation | General lifting |
| GT6 | 6×25Fi | Fill wire | FC / IWRC | Good balance of flexibility & strength | Crane, hoist |
| GT6Z | 6×26WS | Warrington-Seale | IWRC | More wear resistant | Medium duty crane |
| GT8 | 6×36WS | Warrington-Seale | FC / IWRC | High flexibility, fatigue resistance | Tower crane |
| GT8Z | 6×36WS compacted | Compacted WS | IWRC | Higher strength, longer life | Heavy lifting |
| GT8PZ | 6×36WS (plastic / compact) | Compacted | IWRC | Anti-rotation improved | Mobile crane |
| GT8ZD | 6×36WS compacted | Compacted | IWRC | High wear resistance | Construction |
| GT8ZDL | 6×36WS compacted (heavy duty) | Compacted | IWRC | Longer service life | Port crane |
| GT8ZH | 6×36WS high strength | Compacted | IWRC | High tensile strength | Heavy load |
| GT8PZH | 6×36WS optimized | Compacted | IWRC | Better anti-fatigue | High cycle use |
| GT Model | Approx. Standard Structure | Structure Type | Features | Application |
|---|---|---|---|---|
| GT34Z | Multi-strand (similar to 6×K36 / high density) | High density | High strength + stability | Port / heavy crane |
| GT34ZD | Compacted multi-strand | Compacted | Better wear resistance | Harsh environment |
| GT34ZDL | Heavy-duty compacted | Compacted | Extra long life | Mining / port |
| GT35 | High wire count (similar to 6×K41) | Ultra flexible | High fatigue resistance | Frequent lifting |
| GT35ZL | Compacted high-density | Compacted | Strong + flexible | Tower crane |
| GT35ZDL | Heavy-duty high-density | Compacted | Max durability | Severe conditions |