Greek Double Ladder Side Cable Tray Specifications

The Greek Double Ladder Side Cable Tray is a ladder-type system designed for heavy-duty cable support, typically made from fiberglass or steel, with defined rung spacing, side rails, and compliance with IEC 61537 and ASTM standards.

Material and Construction

Fiberglass Option: Pultruded, compression molded, or resin transfer molded fiberglass reinforced plastic (FRP) with 45–65% glass fiber content in pultruded components and 25–45% in molded components.

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V inhibitors and fire retardant additives ensure Class 1 flame spread rating (≤25 per ASTM E-84) and chemical resistance. Conductive resin systems may include carbon additives for static dissipation. Metallic Option: Hot-dip galvanized or bare steel, with epoxy or powder coatings for corrosion protection.

Steel trays are typically MIG welded or mechanically fastened.

Dimensions and Load Capacity

Nominal Depths: 2” (51 mm), 3” (76 mm), 5” (127 mm), 7” (178 mm), 9” (229 mm) depending on cable volume and load requirements. Rung Spacing: Standard spacing varies, often 300–500 mm center-to-center, providing support for horizontal and vertical cable runs. Side Rails: Two longitudinal members forming the ladder sides, connected by transverse rungs.

Side rails provide structural rigidity and support for cable loads. Safe Working Load (SWL): Determined per IEC 61537, with load vs. span tables provided by the manufacturer. Maximum deflection is measured at mid-span for single-span installations.

Compliance and Standards

International Standards: IEC 61537 for cable tray systems, ASTM E-84 for fire performance, and ABS rules for conductive FRP trays on marine or offshore installations.

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E Marking: Metallic trays may comply with European directives and national standards, verified by third-party certification (e.g., UL, IMQ, LCIE),. Corrosion Protection: FRP trays resist chemical and UV degradation; metallic trays use galvanization or coatings for long-term durability.

Installation Considerations

Support System: Must withstand cable load; anchor type and spacing depend on tray material and span length. Cable Management: Rungs allow secure cable tie-downs; cables can enter or exit from top or bottom. Vertical and horizontal runs are supported with minimal sag.

Thermal Expansion: Metallic trays require allowances for expansion and contraction; FRP trays have lower thermal conductivity but may require expansion joints in long runs.

Accessories and Fittings

Fittings: Elbows, tees, reducers, vertical risers, and covers are available to match straight tray sections. Covers: Optional for protection against dust, moisture, or mechanical damage. Joint Connectors: Ensure structural continuity and maintain electrical grounding where required.

Summary

The Greek Double Ladder Side Cable Tray is a versatile, durable system suitable for industrial, commercial, and offshore applications. It offers high load capacity, corrosion resistance, fire retardancy, and compliance with international standards, with options in fiberglass or steel to meet environmental and mechanical requirements. Proper design, support, and installation ensure reliable cable management and long-term performance.