Fiberglass cable trays are available in standardized widths, depths, and lengths suitable for harsh, marine, and industrial environments, with specifications designed for structural integrity and cable support.

Standard Dimensions

Fiberglass cable trays, such as Eaton's B-Line series, are typically available in the following nominal sizes:

• Widths: 4", 6", 8", 12", 18", 24"
• Depths: 2", 3", 4", 6"
• Lengths: Standard straight sections are usually 10 ft (3.05 m) or 20 ft (6.1 m)
• Rung Spacing: 6" to 12" (150–305 mm), depending on cable type and load requirements
• Rung Width: 2" cable support surface for proper positioning and banding

Material and Construction

• Material: Pultruded fiberglass reinforced polyester (FRP) or vinyl-ester resin, providing high corrosion resistance and a favorable strength-to-weight ratio
• Finish: UV-stable gel coat or resin coating for outdoor and marine environments
• Fittings: Mitered construction with 12" (305 mm) radius for bends and transitions
• Load Ratings: Determined by manufacturer tables; trays are designed to meet deflection and stress limits under full cable load

Compliance and Applications

• Standards: ABS approval for marine applications, NEMA and IEC compliance for industrial installations
• Applications: Ideal for caustic, harsh, and marine environments, vertical installations, and areas requiring precise cable positioning
• Accessories: Covers, splice plates, and mounting hardware are available to ensure full system integrity

Design Considerations

• Cable Fill: Tray sizing should consider cable diameter and fill percentage (commonly 40% of usable area) to prevent overheating and maintain inspection compliance
• Support Spacing: Adjust support intervals based on tray width, depth, and load to avoid excessive deflection
• Environmental Factors: Consider chemical exposure, temperature extremes, and UV exposure when selecting material and finish For detailed selection, Eaton provides a submittal builder tool and catalog tables that allow engineers to filter by width, depth, material, and application to generate precise specifications for straight sections, fittings, and accessories .