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Box Culverts

Precast Concrete Box Culverts supplied in single or multiple runs, are extremely versatile, being commonly used to create drainage and water management solutions, tanks, underpasses, tunnels and shafts.

Each Box culvert can be individually designed either by Moore Concretes design team or from direct customer specifications.

Box Culvert units are normally available in 1.5m and/or 2m lengths, with the standard internal sizes range from 1m wide x 0.5m high up to 5m wide x 2.5m high.



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Box Culvert Key Benefits

  • Durability Box Culvert units are normally designed for a 120 year design life.
  • Strength Box Culverts can accommodate highway loading and/or high fill loads.
  • Quick & Easy Installation minimising closure time on infrastructure and construction projects.
  • Minimal Maintenance required even when buried underground.
  • Smooth finish of concrete on the Box Culverts ensures optimum flow.
  • Standard and bespoke design using a range of sizes and internal features, creating tailored solutions.
    • Lengths available 1.5m, 2m or as required
    • Internal Width as standard 1m to 5m or as required
    • Internal Height as standard 0.5m to 2.5m or as required
    • Full table of sizes available in brochure below to download
  • Seal able Joints  Box Culverts have in-wall rebated joints suitable for sealing with any proprietary sealant system.
  • Dry Water Flow can be cast into the Box Culvert.
  • Head Walls can be used in conjunction with Box Culverts to provide an idea end connection point

Want More Information?

For further information regarding Box Culverts please contact a member of our civils sales team on 028 2565 2566, Ext 3 or download our Box Culvert Brochure.

Box Culverts Applications

Precast Box Culverts have a wide variety of uses including:

  • Escape Tunnels
  • Sea & Hydro Outfalls
  • Pipe Replacement
  • Shafts
  • Caisson Units
  • Cattle Underpass units provides farmers with the ideal solution to herding cattle across busy roads. The typical size of a cattle underpass for small to medium cow herds is 3.0m (10′) wide x 2.1m (7′) high. Larger or smaller cattle underpasses are also available.

Box Culvert Design

To facilitate Moore Concretes design team, customers are required to provide the following information;

  • Internal width and internal height
  • Total Length
  • Minimum and maximum fill depth above culvert
  • Surface loading (HA, HB, Field, Railway or other load)
  • Delivery Location
  • Intended use
  • Any special requirements

Box Culvert Installation & Delivery Considerations

Box Culverts are CE Marked & Manufactured to EN 14844, full specification available in the Declaration of Performance 

Box Culvert Internal View Millmount Moore Concrete

Box Culverts are manufactured to allow the use of spherical head anchors or threaded socket lifters for lifting. On delivery to site Moore Concrete recommends

  • they are lowered onto a firm level base
  • they are moved by lifting and never by dragging
  • in cold weather, open lifting sockets or protected from freezing and bursting

Preparing the trench keeping to the specified line and gradient , the trench should be excavated to a width equal to the Box Culvert width plus about 600mm, with a flat well prepared base.

Joints maybe left open in certain cases but a preformed strip compressed within the joint is commonly used. The strip should be applied to the Box Culvert just before it is laid in the trench.

A Box Culvert line is usually laid from the downstream end with sockets facing upstream to receive the next Box Culvert to be laid.

When a preformed strip is used, joints are closed by pulling against the Box Culverts previously laid.

Back filling should commence as soon as possible after the Box Culverts have been laid.

For detailed guidance on installation and delivery  please refer to our Storage and Handling Instructions  document.

For detailed guidance on site practice published by the Box Culvert Association please refer to attached document.

Box Culverts Example Projects

We have numerous examples of projects using Box Culverts in various application including road & rail infrastructure to attenuation tanks, including those below.

Ongoing projects

Oxney Moss Box Culvert units for Carillion PLC to facilitate the existing water course under the overhead road development, where cast with a built in mammal shelf above the stream bed.  Moore Concrete also manufactured Wing Walls jointed to the Box Culverts to create a retaining earth solution at either end of the Box Culverts.

A6 Road Scheme Box Culverts Leaving Moore Concrete