Closed

WP1140 - T5D Design Consultant

Deadline:09 Jun 2026, 21:34 BST

Tender information

UK CF

Maidenhead, United Kingdom

Type: services (tender)
Ref. number: 2a1ded63-c1d7-4984-9540-4dd819838020-900110
Estimated value: 2,500,000 – 5,000,000 GBP
CPV: 71320000

The T5D Rail-tunnel Ventilation Shaft is located adjacent to T5D at its North and can be accessed from the bottom (Level 6) via the trackside of the HEX tunnel or from the top (level 7) via Airside. The o…

bjective is to replace the four attenuators in the T5D Shaft because they are at their end of life. The renewal of the T5D attenuators aims to reduce the risk of debris entering fans, tunnels and station, prevent the fans from failing in any fire scenario and provide ventilation and smoke clearance

for the Heathrow Rail Tunnels. This improves safety conditions within Heathrow Rail Tunnels and improves resilience of systems. In addition, less maintenance and repair are required for the attenuator. Each attenuator is formed of fo

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