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Support for vertical cable trays in cable wells

Fiber and communications infrastructure knowledge brief Published 07 Mar 2023

Prepared for preliminary research by the METRA 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.

Cable wells are vertical cable tray systems designed to route and support cables safely between different floor levels or elevations in industrial and commercial installations.

Overview

Cable wells, also known as vertical cable trays or vertical risers, are used to route cables vertically in buildings, plants, or industrial facilities. They provide a structured path for power, control, and communication cables, ensuring safety, accessibility, and compliance with standards such as DIN EN 61537, NEMA, and IEC 61537. Vertical cable trays are typically installed in shafts, walls, or open spaces where cables need to transition between floors or levels.

Design and Components

A vertical cable tray system consists of: Cable support lengths: These are the main tray sections, which can be ladder-type, perforated, or solid-bottom trays. Fittings: Vertical bends, T-pieces, crossovers, and reducers allow smooth directional changes and height adjustments. Support elements: Wall brackets, center suspensions, or trapeze supports secure the tray to the structure and bear the mechanical load of the cables.

Mounting elements and accessories: Plates, covers, barrier strips, and cable protection rings enhance safety and facilitate installation. Materials commonly used include galvanized steel, stainless steel (304 or 316L), aluminum alloys, and fiberglass, chosen based on environmental conditions, corrosion resistance, and mechanical strength.

Installation Considerations

Load capacity: Ensure the vertical tray supports the weight of all cables, including future expansions. Standard support spacing is typically 3–3. 6 meters for center-hung or wall-mounted supports.

Rung spacing: For ladder-type trays, rung spacing of 150–300 mm is recommended to maintain cable stability and prevent sagging. Bend radius: Maintain the minimum bend radius for cables at entry and exit points to avoid damage. Accessibility: Vertical trays should allow easy cable pulling and maintenance, often using removable covers or open ladder designs.

Environmental protection: Consider covers or coatings for protection against dust, moisture, or corrosive substances.

Applications

Cable wells are widely used in: Power plants, oil refineries, and industrial facilities requiring high-strength, reliable vertical cable routing. Commercial buildings for multi-floor electrical distribution. Areas where organized separation of power, control, and communication cables is critical for safety and performance.

Summary

Vertical cable wells provide a safe, organized, and standard-compliant solution for routing cables between different elevations. Proper selection of tray type, material, fittings, and support elements ensures mechanical stability, ease of installation, and long-term reliability in industrial and commercial environments.

Support for vertical cable trays in cable wells - METRA FIBER MARKET [PDF]

Support for vertical cable trays in cable wells
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GENERAL INFORMATION

As demonstrated in the previous paragraph, Optical Cable Corporation''s cable can be installed in vertical rises for great distances. However, due to the practical nature of installing cable, the weight

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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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