Cable Tray Installation Specifications Table

Cable tray support spacing and specifications depend on tray type, material, load class, and installation environment.

Typical Cable Tray Support Specifications

Tray TypeMaterialLoad Class / RatingMaximum Support SpanNotes / Installation GuidelinesLadder TraySteel / Stainless SteelLight, Medium, Heavy1. 5–3 m (5–10 ft) depending on loadSupports mounted on walls, ceilings, or floors; rung spacing 150–230 mm recommended for instrumentation cables Solid Bottom TraySteel / AluminumLight, Medium1–2. 5 m (3–8 ft)Provides protection against dust and electromagnetic interference; solid cover recommended for heat-sensitive cables Ventilated TraySteel / AluminumLight, Medium1.

5–3 m (5–10 ft)Allows airflow to prevent heat buildup; suitable for power and control cables Wire Mesh / Channel TraySteel / Stainless SteelLight1–2 m (3–6 ft)Ideal for light instrumentation and control cables; flexible routing; supports every 1–2 m Key Considerations for Cable Tray SupportsMaterial and Finish: Steel trays may be pre-galvanized, hot-dip galvanized, or stainless steel (AISI 316L) for corrosion resistance; aluminum trays offer high corrosion resistance and lighter weight. Load Class: Defines the maximum weight the tray can carry over a given span. Light, medium, and heavy load classes are used to select support spacing.

Support Spacing: Determined by tray type, material, and load. Ladder and ventilated trays typically allow longer spans than solid or wire mesh trays. Mounting Options: Trays can be mounted on floors, walls, ceilings, or equipment racks.

Modular systems allow easy configuration for new or existing installations. Rung Spacing: For ladder trays, 6–9 inches (150–230 mm) is recommended to maintain cable support and prevent sagging. Environmental Conditions: Consider ambient temperature, humidity, and corrosive environments when selecting material and finish.

References for Detailed Specifications

Legrand Cable Tray Technical Guide provides material, finish, and load recommendations.

OBO CM

S Guide outlines DIN EN 61537 compliance, support elements, and installation practices. Eaton and Hubbell catalogs provide load class tables, support spans, and accessory specifications for ladder and tray systems.

AB

B Technical Guide details corrosion-resistant materials and environmental considerations. This table and guidelines provide a comprehensive reference for selecting cable tray supports, ensuring proper load handling, spacing, and compliance with industry standards.