Inward Flanged Side Rail Cable Ladder System
The Inward Flanged Side Rail Cable Ladder System is designed for safe and durable cable routing in industrial electrical installations. It features inward 90° flanged side rails, unperforated profile rungs and compatible fittings such as bends, risers, tees, crosses, reducers, covers and couplers. Custom widths, heights, materials, finishes, rung spacing and accessories are available for different cable management projects.
General information
Product Features
- High Load Capacity
Designed to support heavy-duty power cables and large cable bundles. - Long Span Installation
Requires fewer supports, reducing installation cost and time. - Maximum Ventilation
Open ladder structure prevents heat accumulation and improves cable performance. - Easy Maintenance & Access
Cables are fully accessible for inspection and modification.
Dimensions & Specifications
Cable ladders are available in a wide range of sizes for different load requirements.
Standard dimensions are listed below. Custom sizes are available upon request.
|
W (mm) H (mm) |
50 | 100 | 150 | 200 | 300 | 400 | 500 | 600 |
|---|---|---|---|---|---|---|---|---|
| 50 | √ | √ | √ | √ | √ | √ | √ | √ |
| 60 | √ | √ | √ | √ | √ | √ | √ | |
| 75 | √ | √ | √ | √ | √ | √ | √ | |
| 85 | √ | √ | √ | √ | √ | √ | √ | |
| 100 | √ | √ | √ | √ | √ | √ | √ | |
| 110 | √ | √ | √ | √ | √ | √ | ||
| 125 | √ | √ | √ | √ | √ | √ | ||
| 150 | √ | √ | √ | √ | √ | √ | ||
| 175 | √ | √ | √ | √ | √ | |||
| 200 | √ | √ | √ | √ | √ |
Technical Specifications
- Standard Length: 3000 mm / 6000 mm
- Material Options:
Carbon steel, stainless steel (SS304 / SS316), aluminum - Structure:
Side rails with transverse rungs - Surface Finish:
Pre-galvanized, hot-dip galvanized, powder coated - Customization:
Available upon request
Surface Treatment Options
Different finishes are available for various environments.
| Aspect | Powder Coated | Pre-Galvanized (PG) | Hot Dip Galvanized (HDG) |
|---|---|---|---|
| Primary Objective | Corrosion protection & aesthetics | Cost-effective corrosion protection for indoor use | Heavy-duty corrosion protection, weather resistance |
| Surface Material / Treatment | Standard polyester, epoxy, or hybrid powder (organic polymers) | Zinc-coated steel sheet (pre-galvanized coil) | Zinc-iron alloy layer (pure zinc by hot-dip process) |
| Process | Electrostatic spray deposition + heat curing | Continuous galvanizing before forming | Immersion in molten zinc bath (~445 °C) forming metallurgical bond(pre-fabrication) |
| Coating Thickness | 60–120 µm | Typically 10–30 μm | Typically ≥65 µm (can be increased for aggressive environments) |
| Fire Performance | Combustible, produces smoke, no cable protection | Non-combustible (steel base) | Non-combustible (steel base), but no thermal insulation; zinc may vaporize under intense fire, cables still damaged |
| Corrosion Protection | Moderate (indoor, dry environments) | Moderate (indoor, dry environments) | Excellent (suitable for outdoor, marine, salt spray, chemical plants) |
| Surface Finish | Smooth, uniform gloss, wide colour range | Smooth, metallic, uniform | Dull silver-grey, may have zinc spangles or runs |
| Governing Standards | IEC 61537 | IEC 61537, EN 10346 | IEC 61537, ISO 1461 / ASTM A123 |
| Typical Applications | General indoor, offices, commercial spaces without special fire or severe corrosion | Indoor installations, commercial buildings | Outdoor cable trenches, coastal facilities, wastewater treatment, chemical plants, high humidity / high temperature areas |
| Relative Cost | Low | Low | Medium-high |
Technical Description
Cable ladder systems consist of two side rails connected by transverse rungs, forming a structure similar to a ladder.
This design allows cables to be supported at intervals while maintaining maximum airflow and minimal accumulation of dust or moisture.
Cable ladders are particularly suitable for heavy-duty installations and long-distance cable routing, where structural strength and ventilation are critical.
Applications
- Power plants and substations
- Industrial facilities and factories
- Oil & gas and chemical plants
- Outdoor installations
- Large-scale infrastructure projects
Customization
- Custom sizes, materials, and surface finishes are available upon request.
Inward Flanged Side Rail Cable Ladder System FAQ FAQs
Click a question to reveal the answer.
The inward 90° flanged side rail profile creates a closed structural channel that significantly increases beam strength and torsional rigidity compared to open-rail designs. This configuration helps retain cables within the ladder path during thermal expansion and short-circuit events, while the smooth inward edges reduce abrasion risk to cable jackets. It is especially suited for heavy-duty industrial and substation applications where structural integrity under dynamic loads is critical, and it simplifies the attachment of covers and accessories without additional clamping hardware.
The system is designed and tested in accordance with IEC 61537, the international standard for cable tray and cable ladder systems. Compliance covers mechanical load performance, safety factors, dimensional tolerances, and environmental endurance. This ensures that the ladder, when installed per manufacturer guidelines, reliably supports specified cable weights over defined spans. Adherence to IEC 61537 also simplifies project specification for engineers working on power distribution, infrastructure, and commercial building projects that require certified cable management products for life safety and operational continuity.
Yes, custom rung spacing and widths are available. The standard rung spacing is 300 mm centre-to-centre, but alternative spacings can be manufactured to match concentrated load requirements or installation constraints. Standard widths range from 150 mm to 900 mm in several increments, and custom widths are supplied on request. The rungs themselves are unperforated profile sections (top-hat or channel) that are integrally welded to the side rails, ensuring consistent performance even on customized layouts. Engineering review confirms that custom configurations maintain full IEC 61537 load class compliance when properly designed.
The side rails and rungs can be manufactured from pre‑galvanized steel, hot‑dip galvanized steel after fabrication, stainless steel, or with specialized coatings for aggressive environments. Each finish targets specific corrosion protection needs: hot‑dip galvanizing delivers heavy‑duty weather resistance for outdoor and coastal installations, while stainless steel serves chemical plants and cleanroom settings. All finishes maintain the electrical continuity and fire‑resistance characteristics required by the system’s design standards, and they are compatible with site‑applied touch‑up procedures to preserve long‑term durability and aesthetics without compromising structural or circuit‑safety performance.
The system includes a complete suite of compatible fabricated fittings: bends, risers, tees, crosses, reducers, and covers, all produced with the same inward‑flanged side rail geometry and welded rung construction. These fittings maintain uniform load ratings and cable‑retention characteristics through changes in direction and elevation, which is essential for consistent system performance. Chinne Electric ensures that all fittings mate seamlessly with straight ladder sections using standard couplers, eliminating the need for field‑drilled connections and reducing installation time while preserving the system’s full compliance with IEC 61537 across the entire routing network.