U-shaped steel cable trays for FTTH typically have widths from 50 mm to 300 mm, depths from 50 mm to 150 mm, and standard lengths of 3 meters, with medium-duty trays designed for secure, ventilated cable support.

Standard Dimensions

• Width: U-shaped trays for fiber optic cables are commonly available in 50 mm, 75 mm, 100 mm, 150 mm, 200 mm, and 300 mm nominal inside widths. The width determines the number of cables that can be laid side by side and ensures compliance with fill ratios ( ).
• Depth (Sidewall Height): Depths typically range from 50 mm to 150 mm, providing sufficient vertical space to prevent cable sagging and maintain proper bend radius for fiber optic cables ( ).
• Length: Standard straight sections are usually 3 meters, which allows for easy transport and modular installation. Some manufacturers also offer 6-meter sections or custom lengths upon request ( ).
• Material Thickness: Medium-duty steel trays generally have a thickness of 1.0 mm to 2.0 mm, balancing structural strength with ease of handling ( ).

Design and Installation Considerations

• Ventilation: U-shaped trays often feature perforations or cross-slot patterns to allow air circulation, which is important for heat dissipation and maintaining fiber performance ( ).
• Supports and Couplers: Trays include joggled ends, straight couplers, and integral jointing plates to facilitate continuous multi-span installations and secure connections at bends, tees, and risers ( ).
• Load Capacity: Medium-duty trays are suitable for FTTH deployments, supporting multiple fiber cables without excessive deflection or risk of damage ( ).
• Compliance: These trays are designed according to CEI/IEC 61537:2001 standards, ensuring compatibility with international cable management requirements ( ).

Practical Recommendations

• For small FTTH deployments, 50–100 mm width trays with 50–75 mm depth are usually sufficient.
• For larger multi-fiber runs or future expansion, 150–300 mm width trays with 100–150 mm depth provide additional capacity.
• Always consider cable bend radius, fill ratio, and ventilation when selecting tray dimensions to prevent signal degradation and maintain long-term reliability.

By selecting the appropriate U-shaped steel tray dimensions, FTTH installations can achieve efficient cable management, compliance with standards, and long-term scalability.