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London Crossrail SCS

Crossrail is one of the UK’s most challenging engineering feats to date. As you would expect, complex underground environments require intricate, precise and robust smoke control systems.

Project: Design, build, assure and commission of SCS controllers
Main Client: LB Foster Company
Building Type: Underground rail
Location: London


The Appointment

Our experience in automation of Smoke Control Systems, and designing the complex controls at Heathrow T2a, meant we were recommended out of only a handful of other companies capable of achieving this challenge.

After winning the design stage, we were appointed to final design the panels, build and commission the SCS control systems for three of the Crossrail stations being delivered by LB Foster – Liverpool Street, Farringdon and Whitechapel.

The Challenges

In underground stations, not only does the design criteria need to cover the requirements of the traditional shaft, stairs and lobbies, but it also has to work in conjunction with the station’s platform and tunnel ventilation systems and their respective fire alarm situation operating specifications.

Each station required a tailored system of life safety critical control panels for a pressurised smoke control system covering the ingress and egress shafts at each end of the above station platforms. The systems also had to integrate into the overall station BMS, fire alarm system, over-platform extract and tunnel ventilation systems, in order to initiate the smoke control equipment in the event of a fire alarm.

The controls adhere to multi-layered alarm priorities so that they operate effectively where there are many potential alarm sources, alarm sequence order and potential fire scenarios.

The Outcomes

  • Throughout, we have worked to the highest level of assurance in terms of testing and certification to meet Crossrail and London underground requirements.
  • The panels were produced to meet regulations including British standards and all third party testing and accreditation.
  • Our design and control logic capabilities led us to provide advice and consultancy to the Crossrail Engineering Group (CEG) engineers, and their designers and contractors, on how to achieve a robust system across all of the Elizabeth Line stations.
  • Furthermore, we are providing software for a fourth station for Chartwells.
  • With a multitude of project teams and dependencies to fit in with, our project control capabilities have helped keep this incredibly complicated project running smoothly and tightly under control.


Project Partners

Station: Liverpool Street
Principal Contractor: Laing O’Rourke
Designers: Arup

Station: Farringdon
Principle Contractor & Designers: BFK (Bam, Ferrovial, Kier) JV via their M&E delivery partner NG Bailey

Station: Whitechapel
Principle Contractor: BBMV (the Balfour Beatty, Morgan Sindall, VINCI Construction joint venture)
Designers: Baker Hicks

Further Information

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