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Thickness of cable trays in pipe gallery

Fibre interconnection and data room reference Published 29 Oct 2025

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The standard thickness of cable trays typically ranges from 1. 5 mm to 3. 0 mm for light to medium duty, and up to 4.

0 mm for heavy-duty applications, depending on material, load, and environmental conditions. Typical Material Thickness by Duty ClassLight-duty trays: 1. 5–2.

0 mm (commonly used for small instrumentation, control, or low-voltage cables)Medium-duty trays: 2. 0–3. 0 mm (suitable for standard power and communication cables in industrial or commercial pipe galleries)Heavy-duty trays: 3.

0–4. 0 mm (used for large power cables, long spans, or areas with high mechanical stress) These thicknesses apply to steel, stainless steel, or aluminum trays, with galvanization or protective coatings adjusted according to environmental exposure, such as humidity, chemical presence, or outdoor installation.

Factors Affecting Cable Tray Thickness

Load Capacity: Thicker trays are required for heavier cable loads or longer unsupported spans. Material Type: Aluminum trays may require slightly greater thickness for equivalent strength compared to steel due to lower density and stiffness. Environmental Conditions: Corrosive or high-temperature environments may necessitate thicker or coated trays to maintain structural integrity.

Standards Compliance: IEC 61537, NEMA VE 1, and NEC guidelines influence minimum thickness requirements to ensure mechanical strength, fire resistance, and electrical safety.

Practical Considerations in Pipe Galleries

Ventilation and Heat Dissipation: Perforated or ventilated trays may have slightly reduced thickness but must still meet load requirements.

Segregation and EM

C: In facilities with multiple cable types, trays may need additional thickness or dividers to maintain electromagnetic compatibility and proper cable separation. Installation Span: Shorter spans allow lighter trays, while longer spans require thicker side rails or additional support brackets. In summary, selecting the correct cable tray thickness involves balancing mechanical load, material properties, environmental exposure, and compliance with IEC/NEMA standards.

For most pipe gallery installations, 2. 0–3. 0 mm steel trays are standard, with adjustments for heavy-duty or specialized conditions.

Thickness of cable trays in pipe gallery - FD SOLUCIONES OPTICAL SYSTEMS [PDF]

Thickness of cable trays in pipe gallery
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