- Made in North Devon since 1973
- BSI Kitemark ready-mixed concrete
- Manufactured to BS EN 14992
- UK-wide & European delivery
Civils · drainage · highways
Headwalls & Wing Walls.
CIRIA-detailed. Engineer-signed. Lifted in a day.
Precast headwalls and wing walls for culvert outfalls — pipe sockets cast in, splayed wings, scour aprons and trash screens detailed to CIRIA C786. Catalogue sizes from 600mm to 1200mm (2ft to 3'11") pipe; bespoke from 1800mm up to 3000mm (5'11" to 9'10") span. Cast in C40/50 to BS 8500-1:2023. Civils lead time 4-6 weeks.
A headwall is the precast concrete face that retains the embankment around a culvert outfall and stops the watercourse from undercutting the pipe. CIRIA C786 sets the design rules for hydraulic capacity, scour protection and screen access. WCCP cast catalogue and bespoke headwalls to suit.
Highway, Network Rail, water-utility and farm outfalls — we cast, deliver and install across the UK from the Holsworthy yard.
- · CIRIA C786 detailed
- · 600mm to 3000mm (2ft–9'10")
- · Splay 30°/45°/60°
- · Trash screen option
- · Engineer-signed
- · 4–6 week lead
📷 Photo needed
Hero shot — installed precast headwall at a culvert outfall, showing splayed wing walls, pipe socket and water flow, ideally a Devon or Somerset highway job
Specification
Pipe sizes, dimensions and splay options.
Catalogue sizes for the standard pipe ranges. Bespoke spans, splay angles, scour aprons and trash screens detailed to project requirements.
| Variant | Dimensions | Detail | Typical use |
|---|---|---|---|
| Headwall — 600mm (2ft) pipe | 1500 × 1200 × 200mm (4'11" × 3'11" × 8in) | Pipe socket cast in · splayed wings | Field drains, small culverts, ditch crossings |
| Headwall — 900mm (2'11") pipe | 2000 × 1400 × 250mm (6'7" × 4'7" × 10in) | Pipe socket cast in · splayed wings | Standard farm and estate culverts |
| Headwall — 1200mm (3'11") pipe | 2400 × 1600 × 250mm (7'10" × 5'3" × 10in) | Pipe socket cast in · splayed wings | Highway and rural-road culverts |
| Headwall — 1800mm (5'11") pipe | 3200 × 2000 × 300mm (10'6" × 6'7" × 1ft) | Pipe socket cast in · splayed wings | Major culverts, river crossings |
| Headwall — 3000mm (9'10") span | Bespoke to spec | Box culvert outfall · engineer-detailed | River and large drainage outfalls |
| Wing Wall — paired | Bespoke to spec | Cantilever splay · 30°/45°/60° | Embankment retention at outfall |
All headwalls supplied with structural calculations and CIRIA C786 hydraulic check. Pipe sockets cast in to suit twin-wall, vitrified clay, ductile iron or concrete spigot.
”The
”Headwalls
Where they go
Common applications.
From a 600mm (2ft) field-drain ditch crossing on a Devon farm to a 3m (9'10") river outfall on an A-road improvement, the engineering is the same — CIRIA C786, properly detailed.
- · Highway and rural-road culvert outfalls (DfT and county standards)
- · Estate and farm ditch crossings under access tracks
- · Pipe outfalls into watercourses (EA discharge consents)
- · SuDS attenuation pond inlets and overflows
- · River training and embankment retention at culverts
- · Network Rail under-track drainage outfalls
- · Water utility surface-water outfalls
Standards & references
Cast and detailed to current best practice.
- CIRIA C786 (2019, 2024 updates)
- Culvert, screen and outfall manual — UK design reference for headwalls and trash screens.
- DMRB CD 360
- Highway drainage design — culvert and outfall requirements for trunk roads.
- BS EN 14844
- Precast concrete box culverts — applicable to large-span outfall bases.
- BS 8500-1:2023
- Concrete specification — C40/50 mix for buried and submerged conditions.
- EA Land Drainage Byelaws
- Discharge consents, Flood Risk Activity Permits and main-river ordinary watercourses.
Configure your outfall
Send the long-section and pipe size — we will quote inside 48 hours.
Related products
Often ordered alongside.
Common questions
What people ask about headwalls.
Five questions we answer most weeks. If yours is not here, ring the yard.
What is CIRIA C786? +
CIRIA C786 — "Culvert, screen and outfall manual" (2019, updates 2024) — is the UK best-practice guide for designing pipe outfalls, headwalls and trash screens. It covers hydraulic capacity, scour protection, fish-passage where relevant, and maintenance access. Every WCCP headwall is detailed against C786 and signed off by our consulting engineer.
Do you offer trash screens and grilles? +
Yes. We supply a galvanised mild-steel debris screen sized to the pipe, with sloping bars at 75mm centres and a hinged maintenance access. Detailing follows CIRIA C786 — the screen is set forward of the pipe so debris can be raked clear without entering the watercourse.
What about Environment Agency consents? +
Any outfall to a designated watercourse needs an EA Land Drainage Consent or, in main-river territory, a Flood Risk Activity Permit. We supply the precast and the structural calculations; the consent application is the contractor’s or designer’s responsibility, but we have helped on dozens of submissions and we know what the EA wants to see.
Can you do bespoke shapes? +
Yes — most headwalls past 1200mm (3'11") pipe are bespoke. Splay angles, wing-wall heights, scour aprons and fish-baffle details all change with the site. Send us the long-section and a hydraulic summary and our engineer will detail to suit.
What is the lead time? +
Catalogue headwalls (600mm to 1200mm pipe) ship in 4 to 6 weeks. Bespoke and large-span outfalls run 6 to 10 weeks for the design-and-cast cycle. Highway and Network Rail jobs add 2 weeks for client design approval.
How would you like it?
Supply-only or fitted — Headwalls and Wing Walls
Supply only
Per-unit / per-metre supply
Lead time: 4–6 weeks
- Precast headwall and wing-wall units cast to spec
- Pipe socket cast in to suit pipe make
- Structural calcs and CIRIA C786 check
- Delivery on our HIAB or low-loader
- Excavation and concrete base
- Trash screen unless specified
- Backfill and embankment reinstatement
Fitted (supply + install)
Supply + install crew
Lead time: 6–10 weeks (incl. site slot)
- Everything in supply only
- CSCS-carded install crew with crane
- Pipe make-up and joint sealing
- Excavation, base concrete and watercourse diversion
- Environment Agency consent application
. Highway, Network Rail and major outfall works priced individually — send the long-section and we'll come back within two working days.
Ready to spec it?
Send us pipe size, embankment height and the long-section. Quote within 48 hours.