Precast Concrete Box Culverts

Precast Concrete Box Culverts

A Precast Concrete Box Culvert is an easily-installed conduit used to enclose small roads, pathways or flowing water (e.g. streams, storm water or drains) passing beneath roads, railways or embankments. Shay Murtagh Precast is one of the largest producers of precast concrete box culverts in the UK and Ireland. With our modern and mechanised box culvert production facilities, we can produce over 60 metres of culvert section per day.  We manufacture a range of standard stock size box culverts but most units we design and manufacture to meet individual project specifications.  This allows us complete flexibility and enables us to manufacture culverts that can accommodate any situation.

Flexible Design and Manufacture

Larger box culverts that cannot be transported as a single unit are constructed from two U-sections for on-site assembly.  These are referred to as UAN culverts.

We also supply three-sided culverts if the project specifies access from above.  Similarly, we design and manufacture portal frames in situations where a bottom slab is prohibited or deemed to be an economic disadvantage. (link to an example)

Shay Murtagh Precast culverts are supplied with rebated joints to allow sections to be laid open or sealed. Wing walls and head walls associated with a culvert can also be supplied

Wing Walls
Wing Walls are retaining walls placed at the culvert entrance and exit.  The tops of the walls are sloped to match soil contours. Wing walls help to form and protect the ends of the culvert and are designed and manufactured to match the precast culvert specifications and ground conditions.

Head Walls
Head walls, also known as head beams, are typically located between wing walls at the ends of the culvert. Head walls serve to retain any soil above the top slab of the culvert in order to form and protect the culvert entrance and exit.

Box Culvert Design Team

Our in-house team of experienced engineers and technicians deliver a top-quality design and detailing service that is both thorough and flexible. Detailed designs are carried out in-house for each individual project.  This allows us maximum flexibility with regards to job specific constraints and conditions while enabling us to complete the detailed design and produce the corresponding CAD drawings and details rapidly.

Shay Murtagh Precast Concrete Box Culverts are typically designed and detailed in full compliance with

  • EN 1992-1-1,
  • EN 1992-2,
  • EN 1991-1-1,
  • EN 1991-2,
  • the relevant National Annexes for the said Eurocodes,
  • PD 6694-1:2011,
  • BS 8500-1:2006 and
  • BS 14844:2006+A1:2008.

Where required, we can design and detail culverts to

  • BS 5400: Part 4,
  • BD 31/01 and
  • BD37/01 or
  • BS 8110.

The experience, technical capability and flexibility of our design team allow Shay Murtagh Precast to comply with any required standard or specification.

Latest news and completed projects

We are proud to have worked on some of the biggest infrastructure projects in Ireland and the UK. Our qualified design team work with major contractors to develop value engineering solutions.



Register online now for access to download the Shay Murtagh Precast Bridge Beam Technical Manual Edition 3 – the conclusive technical manual for bridge beam design – including our online BIM Library which contains Revit objects of our beams available to download.


Click here to view our video blogs.

These videos were produced onsite at our factory with Steve Lowe, Senior Design Engineer at Shay Murtagh addressing different aspects of design.

Bespoke Culvert Design Gallery



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