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Box Culverts

  • FP-McCann-Precast-Concrete-Drainage-Box-Culvert
FP McCann, Box Culvert
Designed and manufactured in accordance with all current design specifications and relevant standards, FP McCann box culverts are available in span sizes from 1000mm to 5400mm and internal heights from 500mm to 3600mm dependent on the final mould configuration adopted. A bespoke CAD design service is also available where non-standard unit sizes can be accommodated along with any other internal features requested by the client.
FP McCann’s experienced engineers and detailing team together with a modern production facility at Telford, Shropshire, have the flexibility to quickly respond to meet any design criteria and deliver nationally to just-in-time requirements.
Supplied in either single or multiple runs, the use of precast concrete box sections in civil engineering projects is wide ranging, from their use for directing watercourses to the provision of attenuation tanks and underpasses. FP McCann is a member of the Box Culvert Association (BCA) and products comply with all relevant standards as set out in accordance with BS ISO 9001 and 14001.
Structural strength and long life performance
Durable system meeting the design life requirements for buried structures. Minimum maintenance required.
Ease of installation
Can be easily positioned in shallow or deep fill installations.
Flexible sizes and internal features
Can be manufactured in a range of sizes and accommodate features such as dry weather flow channels, mammal ledges and dual cell configuration units, plus tapered and skewed units if required.
Additional Features
End walls, access points, vent holes, inlets, outlets, rungs, angles and splayed ends can all be added to any run of culvert. Starter bars and sockets can be added to facilitate any additional casting on site which may be required as part of the finished work.
Box Culvert Applications
  • Attenuation and storage tanks
  • Water course diversion
  • Open channels
  • Road crossings
  • Pedestrian and vehicle subways
  • Shafts
  • Service tunnels and ducts
  • Conveyor protection

Typical Culvert

Units are available in internal span sizes from 1000mm to 5400mm and internal heights from 500mm to 3600mm, with unit lengths to a maximum of 2000mm dependent on final mould configuration.

FP McCann Precast Concrete Drainage Box Culvert Typical Culvert


Mammal Ledges

Cast in mammal ledges allow access through the culvert to wildlife without the requirement for extra site provisions

FP McCann Precast Concrete Drainage Box Culvert Mammal Ledges



Half round (or equivalent) channels can be cast into the floor of the units at any position with a choice of equivalent half round diameters.

FP McCann Precast Concrete Drainage Box Culvert Channels


Dual Cell 

Used to facilitate separate water passage through the structure.

FP McCann Precast Concrete Drainage Box Culvert Dual Cell



Combined with either a channel or cast as a “vee” benching improves self cleansing flow rates.

FP McCann Precast Concrete Drainage Box Culvert Benching



Bespoke units accommodating a variety of features can be manufactured to the customers design requirements

FP McCann Precast Concrete Drainage Box Culvert Specials