Costain Limited (H7-Heathrow) · Contracts Finder

Closed

Tender: H7 Renewals – Steelwork Replacement and Corrosion Treatment in CTA Tunnel Undercroft

Released 7 months ago

Closed06 Apr 2026

Est. valueEstimate£35K to £2.8M

LocationLondon

AgencyCostain Limited (H7-Heathrow)

SourceContracts Finder

CategoryInfrastructure

Submissions closedClosed Mon, 6 Apr 2026

About

A client is seeking a steelworks contractor for the H7 Renewals portfolio in the CTA Tunnel. Works include replacing steelwork and treating corroded steel along the tunnel undercroft (confined/restricted space), handling 5.5 tonne steel in the undercroft, propping the side bore from the undercroft while swapping out steel, grouting baseplates and removing steelwork, and exploring circular economy options for repurposing removed steel.

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Costain Limited (H7-Heathrow)

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