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Method for Fabricating Horizontal Cable Trays

Fiber and communications infrastructure knowledge brief Published 18 Nov 2023

Prepared for preliminary research by the ENSAA knowledge desk. Confirm optical interfaces, port or core capacity, electrical input and output, enclosure protection, thermal design and installation limits against current standards and product documentation.

Horizontal cable trays are fabricated by selecting appropriate materials, cutting and shaping tray sections, assembling fittings, and installing supports at regular intervals to ensure stability and compliance with standards.

Material Selection

Choose the cable tray material based on environmental conditions and mechanical requirements. Common materials include galvanized steel, stainless steel (AISI 316L), aluminum, and pultruded fiberglass. Stainless steel and aluminum offer excellent corrosion resistance, while galvanized steel provides economical protection through sacrificial zinc layers.

Material selection should comply with BS EN 61537 or equivalent standards for cable tray systems.

Fabrication Steps

Cutting and Shaping: Cut tray sections to the required lengths using appropriate tools. Ensure edges are smooth to prevent cable damage. Bends, T-pieces, and crossovers are fabricated using standard sheet metal techniques or pre-manufactured fittings.

Assembly: Connect tray sections using bolts, nuts, or rivets as per manufacturer specifications. Ensure joints are tight and aligned to maintain a continuous horizontal run. Surface Treatment: Apply corrosion protection if required, such as hot-dip galvanization, powder coating, or anodizing for aluminum trays.

Installation of Supports

Place threaded rod supports or wall brackets at intervals not exceeding 1. 2 meters to prevent sagging. Ensure supports are level and aligned with the horizontal route.

Provide additional support at bends, branches, and offsets to maintain structural integrity.

Layout and Clearance

Review approved shop drawings to mark horizontal tray routes. Maintain adequate clearance for cable pulling and future maintenance. Avoid clashes with other services and ensure proper coordination with civil and MEP installations.

Final Checks

Inspect all fabricated trays for damage or defects before installation. Verify that all fittings, supports, and accessories are correctly installed. Ensure compliance with safety and electrical standards, including load capacity and grounding requirements.

By following these steps, horizontal cable trays can be fabricated and installed efficiently, providing a durable and safe support system for electrical and communication cables.

Method for Fabricating Horizontal Cable Trays - ENSAA OPTICAL NETWORKS [PDF]

Method for Fabricating Horizontal Cable Trays

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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