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🚆 Modernising Bridge Construction with the Network Rail Conarch System 🚆

The Conarch system is transforming how masonry arch overbridges are reconstructed, and it’s just as effective for new-build projects. By utilising precast concrete Conarch units and a suite of standard designs, this system streamlines both design and construction, helping to control costs and accelerate project delivery.
Key Benefits:

✔️ Increased Railway Gauge Clearance: Supports gauge enhancement and overhead electrification with minimal changes to road profiles.

✔️ Flexible Geometry: Accommodates bridge spans from 7.4 to 9.4 metres, skews up to 45°, and internal widths between 4.5 and 12.5 metres.

✔️ Reduced Design Time: Standardised precast units and the intuitive ‘Conarch Calculator’ significantly cut down scheme-specific design work.

✔️ High Containment Parapets: Includes H4a high containment parapet details as standard.

✔️ Efficient Manufacturing: Common central curved soffit ‘tunnel’ profile simplifies production and supports quality consistency.

✔️ Technology & Compliance: The Conarch Calculator assists with layout and reinforcement, ensuring compliance with Euro Code and National Annexes.
Purpose & Application:

Designed primarily for reconstructing masonry arch overbridges, the Conarch system is also ideal for new-build projects, delivering efficiency, safety, and flexibility for gauge enhancement and electrification schemes.

The Conarch system is a great example of how smart engineering and standardisation can deliver faster, more cost-effective, and future-ready solutions for the UK’s rail infrastructure.

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