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Bespoke Precast Concrete Headwalls

Althon manufactures the largest range of precast concrete headwalls in the UK, catering to pipes, culverts, and box culverts. However, there are times when a bespoke solution is necessary, and we are equipped to deliver that as well.

Recently, we completed a project in Cumbria, where we designed a multiple piece headwall that includes a Kee Klamp handrail, multiple level grating, and stop logs. Prior to galvanizing, our factory assembles all components to ensure that once the headwall reaches the site, there are no fitting issues. This meticulous process guarantees a seamless installation and high-quality results.

For more information visit our website https://www.althon.co.uk/ or contact our sales team sales@althon.co.uk

Althon Headwall - Types of Projects

Althon Headwalls for HS2

Althon have supplied hundreds of headwalls to the HS2 rail project. Where required Althon have supplied headwalls with CARES accredited steel reinforcement. All the headwalls were manufactured with a low carbon concrete mix whilst adhering to the requirements of BS 8500

Althon headwalls where required comply with HS2 specification for civil engineering works. SCEW-1700 Structural Concrete relates to precast structures being used in a structural or load bearing capacity. Althon headwalls can fall under this specification due to their retaining wall nature. The specification requires relevant Althon headwall structures have a 120 year design life which is determined by a minimum concrete cover to steel reinforcement on the wall and apron thickness as well as a requirement for grade 316 stainless steel components that come into contact with the concrete. This includes the cast in accessory sockets, toe extension connection and any internal reinforcement steel that anchors these sockets.

Althon Headwalls for Infrastructure Projects

As well as HS2 Althon has supplied precast headwalls to Hinkley Point C and Sizewell C Nuclear Power Stations as well as to airports, freight terminals & ports as well Althon headwalls to solar farms and infrastructure associated with Offshore Wind

Althon Headwalls for Highways

Althon can help specify the correct headwalls for your highways scheme with options on headwalls with both 50 and 120 year design life

Althon Headwalls for Water Authorities & The Environment Agency

Althon can assist with specifying the correct headwall to use depending on the requirements of a specific water authority or the Environment Agency. Althon have headwalls suitable for adoption under Sewerage Sector Guidance as well as ranges specific to Severn Trent and Anglian Water.

Headwalls for Bellway Homes 

Great to see some of the precast concrete headwalls installed for Bellway Homes in Thames Valley.

We supplied three precast concrete headwalls, all factory fitted with GMS sloped gratings to prevent anyone from entering the pipework.

📸 by Aaron Connellan

Frequently asked questions?  

One of the most common questions we receive is, "Do you have a headwall to suit twin pipes?" All of our precast concrete headwalls can accommodate multiple openings, which can be configured side by side, one above the other, or in the back wall and wing walls.

For more frequently asked questions, please visit our website

New Mitred Headwall Range 

Althon mitred headwalls for pipework up to and including 600mm are fibre reinforced precast concrete open inlets allowing surface water runoff to enter SUDS features, or to act as an outlet or overflow. The profile of the inlet 1:3 (18 Degrees) is the same as the surrounding ground in accordance with guidelines for the construction and adoption of swales and ponds. There is a recess formed in either side to key the unit into the slope of the swale or pond and prevent it slipping.

We can provide our mitred headwalls with stainless steel or galvanised steel straight bar gratings. A top & bottom bracket locate the grating bars, and they are locked into position with a locking bar at the top. The bars are able to be removed individually for ease of maintenance. The grating is located in an 80mm deep recess in the face of the unit to protect it from damage during routine maintenance i.e. mowing.

We are also able to factory fit inline non – return valves such as WaStop valves to our Mitred Headwalls. For more information visit Mitred Headwalls