Marshalls CPM’s precast concrete box culverts are designed and manufactured in accordance with EN 14844 in both standard sizes available from stock and a bespoke range that is manufactured to customer specification, ensuring that those who require standard sizes as well as those who require something extra are catered for.
Marshalls CPM is able to offer end walls, access points, vent holes, inlets, outlets, double rungs, splayed ends, starter bars and threaded sockets, a range of different inverts, dry weather flow and dished inverts. The culverts can be supplied as standard units or vertical chambers and if being used as a channel, cover slabs can be supplied separately. Marshalls CPM box culverts are available in square or rectangular units and can be used as single or multi-unit runs, giving excellent mechanical and hydraulic performance.
All precast concrete box culverts are manufactured to class 4 (DC4) chemical resistance in accordance with the recommendations of BRE Special Digest 1.
Marshalls CPM Box Culverts suit a wide variety of applications:
Highways
Storm and Foul Sewers
Sea Outfalls
Tunnels and Subways
Underpasses
Stream Crossings
Vertical Chambers
Open Channels
Shafts
Attenuation and Storage Tanks
Bedding, Laying and Jointing
When working in trenches, health and safety must always be observed by everyone in site at all times and Marshalls CPM recommends that box culverts should be installed on a 200 think granular bedding as specified in the Specification for Highways Works (MCDHW) or UK WIR Ltd ‘Civil engineering specification for the water industry’.