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PROtrough is an innovative, lightweight, fire retardant cable trough system that offers a modern alternative to traditional concrete trough systems for rail, light rail and power markets.

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Product Overview

PROtrough has been designed to be lightweight and comply with major rail fire retardancy specifications for tunnels and stations. Other alternative lightweight thermoplastic troughing systems are not able to achieve these fire standards. This unique combination of light weight and fire retardancy makes PROtrough the ideal solution for modern rail, station and tunnelling projects. An extensive range of adaptable accessories have been designed to enable a high degree of flexibility, ease of access and seamless integration with other Cubis access chamber and cable protection products

Features & Benefits

Network Rail Approved

Approved for full use within electrical substation compounds.

Water Drainage

Moulded slots within the base of the PROtrough unit allow for natural drainage of water into the ground below.

Quick Assembly

PROtrough offers simple slide and drop male to female connectivity with a unique one click interlocking cover and sliding mechanism.

Unique Cover

PROtrough’s distinctive tread pattern and concave shape increases natural water runoff preventing the build-up of ice. The uniquely designed cover ensures no material ingress when access is required.


Weighing under 20kg PROtrough offers significant health and safety advantages over traditional concrete troughing systems that can weigh over 90kg. PROtrough is suitable for single person lift and install, enabling compliance with manual handling regulations. Being lightweight and easy to deploy results in considerable project time and cost savings.

Fire Retardant

PROtrough is a GRP cable management trough that has been designed to comply with all European fire retardant specifications, including those for tunnels and stations. PROtrough has passed several accredited external tests including the DIN53438-2, hot brake shoe fire resistance, wooden crib and K1 tests.

Custom Badging and Locking Options

MULTIduct™ combines multiple cable ducts that would traditionally be separated. This results in the need for a reduced excavation resulting in narrower, shallower trenches, no graded backfill between ducts and reduced time, during installation.

Linear Ballast Anchor Points / Multi Point Handle Grip

Linear ballast anchor points secure the PROtrough unit into the surrounding material, meaning units are not displaced by the velocity of passing trains or vehicles. Multi point handle grips provide easy grab positions for installers to make manual handling simpler.

How it Works

PROtrough is a highly durable cable protection system that easily resolves engineering challenges for cable laying. The system offers a simple slide and drop male to female connectivity with a unique one click interlocking cover and sliding mechanism.

Seamless Integration

Seamless Integration

PROtrough has been designed to offer seamless integration with the Cubis range of cable protection and access chamber products such as ULTIMA Connect and MULTIduct™ enabling enhanced cable management and access.




Glass Reinforced Polyester Resin (GRP), is a composite material, made of a polyester resin reinforced with glass fibres.

Load Rating

Load Rating

PROtrough meets the vertical load class of A15 set by EN124.

PROtrough has been designed with optimum sidewall strength performance to ensure minimal flex when back filled.

Options and Accessories

PROtrough can be supplied with the following accessories:

Wedges and Adapters

Wedges and Adapters

The PROtrough wedge has been designed to assist in any curvature needed within specified cable routes. The unique one click assembly of the wedge units can be adjusted to turn either right or left to accommodate a 1.5 meter bend radius.

PROtrough’s unique adaptor system enables male to male, female to female connection with the added flexibility to easily install unit sections in the opposite direction.

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30° Elevation Connection System

30° Elevation Connection System

PROtrough’s elevation connection system is designed to deal with abrupt changes in elevation in scenarios such as:

  • On site obstacles
  • Unique surface level connection to elevated troughing system
  • Embankment install
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5 Way Junction Box

5 Way Junction Box

PROtrough’s truly unique junction box is a first within the troughing market. The junction box brings flexibility and adjustability to allow a 5 way inlet and outlet to cable routes and individual customer needs.

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