Thick-type cable trays

Thickened cable trays are designed with increased material thickness to enhance structural strength, prevent sagging, and support heavier cable loads over longer spans.

Purpose of Thickened Cable Trays

Thickened cable trays are used in installations where standard trays may not provide sufficient rigidity or load-bearing capacity. Increasing the tray thickness improves side-rail rigidity, cross-sectional strength, and resistance to bending or buckling, ensuring long-term stability under heavy cable loads or wide support spans. They are particularly important in industrial plants, high-voltage distribution systems, and large commercial infrastructures where cable weight and environmental stresses are significant.

Recommended Thickness by Tray TypeDifferent cable tray types require specific thickness ranges to balance structural integrity and material cost: Ladder Cable Trays: Heavy-duty ladder trays, used for dense bundles of power cables over long spans, typically require 2. 0mm to 3. 0mm thick sheet metal to prevent linear twisting, side-rail deflection, or rung deformation.

Perforated Cable Trays: These trays provide continuous bottom support with ventilation openings and generally use 1. 2mm to 2. 0mm thick sheets, offering a balance between weight and structural stability.

Solid Bottom Trunking & Raceways: For maximum shielding and environmental isolation, thicknesses of 1. 5mm to 2. 0mm are common to maintain flat profiles and support intermediate mounts.

Factors Affecting Thickness Selection

When selecting the appropriate thickness, consider: Cable Load Density: Heavier or more numerous cables require thicker trays to prevent sagging. Support Spacing: Wider distances between hangers increase bending stress, necessitating thicker material or deeper side rails. Tray Type and Application: Ladder trays prioritize load capacity and heat dissipation, perforated trays balance ventilation and support, and solid trays focus on shielding and environmental protection.

Compliance with Standards: Ensure trays meet NEC, NEMA, IEC, or local standards for deflection, load, and safety.

Benefits of Thickened Cable Trays

Enhanced Structural Integrity: Reduces sagging and deformation under heavy loads. Longer Span Capability: Supports wider distances between brackets without compromising safety. Improved Safety: Minimizes risk of cable damage or failure due to tray deflection.

Durability: Extends service life in demanding industrial or commercial environments.

Conclusion

Thickened cable trays are essential for installations with high cable density, long spans, or heavy-duty applications. Selecting the correct thickness involves evaluating load, support spacing, tray type, and compliance standards to ensure safety, durability, and long-term performance. Properly designed thickened trays prevent structural failures and maintain efficient cable management in complex electrical systems.