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Highway D400 manhole covers

Designed and manufactured to meet the enhanced requirements of Highways England’s CD 534 v0.1.0 (formerly HA 104/09) specification. The Kitemarked Highway range of manhole covers exceeds BS EN 124:2015 requirements and includes safety and specific design features required by Highways England.

View products HaloHinge D400
Highway D400 double triangular manhole cover

Features

  • 70+ PSRV tested at top surface of chequer by UKAS accredited 3rd party.

    PSRV tested

  • Indexed corners ensure correct orientation first time, every time.

    Indexed corners

  • The enlarged frame corners help to dissipate loads onto the foundation, providing a longer service life and increased reliability.

    Enlarged frame corners

  • Safety keyway prevents accidental disengagement of the lifting key during the handling process.

    Safety keyway

  • Mechanical lifting points are provided.

    Mechanical lifting point

  • A retrofittable ID badge can be fitted, also compatible with antennas and communication options (RFID, NFC, IoT)

    Retrofittable badge

  • Safety keyway prevents accidental disengagement of the lifting key during the handling process.

    Safety keyway

  • Meets the requirements of CD 534 v0.1.0 (formerly HA 104/09).

    CD534 v0.1.0

Should I upgrade to an E600 cover?

There are several advantages, and reasons driven by standards, to increase the load classification of an access cover from D400 to E600, including:

Increased frame bedding area

E600 covers feature an increased frame bedding area, which results in a reduction in bedding stresses during trafficking, increasing the longevity of the product and its installation.

Increased resistance to unintended traffic

E600 products are more likely to be resistant to unintended traffic loads e.g. pre-service loads as commonly found on construction sites which can result in damage to installed ironwork.

AADT >1,500?

National Highways CD 534 stipulates where the Annual Average Daily Traffic (AADT) of light goods vehicles travelled on a road is greater than 1,500 in each direction, an E600 cover must be installed. Most A roads will have an AADT above this.

Read more about CD 534
View the Highway E600 range

Square and Rectangle manhole covers

Stock code Range Clear opening
(mm)		 Overall frame
(mm)		 Frame depth
(mm)		 Options My Wrekin
DMT0D4/4545/KH Highway 450 x 450 665 x 665 100
DMT0D4/6045/KH Highway 600 x 450 815 x 665 100
DMT0D4/6060/KH Highway 600 x 600 820 x 820 100
DMT0D4/6767/KH Highway 675 x 675 885 x 885 100
DMT0D4/7560/KH Highway 750 x 600 965 x 815 100
DMT0D4/7575/KH Highway 750 x 750 965 x 965 100
DMT0D4/9060/KH Highway 900 x 600 1,115 x 815 100
DMT0D4/9090/KH Highway 900 x 900 1,130 x 1,130 100
DMT0D4/1267/KH Highway 1,220 x 675 1,460 x 895 100
DMT0D6/4545/KH Highway 450 x 450 665 x 665 150
DMT0D6/6045/KH Highway 600 x 450 815 x 665 150
DMT0D6/6060/KH Highway 600 x 600 810 x 810 150
DMT0D6/6767/KH Highway 675 x 675 895 x 895 150
DMT0D6/7560/KH Highway 750 x 600 965 x 815 150
DMT0D6/7575/KH Highway 750 x 750 965 x 965 150
DMT0D6/9060/KH Highway 900 x 600 1,115 x 815 150
DMT0D6/9090/KH Highway 900 x 900 1,130 x 1,130 150
DMT0D6/1267/KH Highway 1,220 x 675 1,460 x 895 150

Square to round manhole covers

Stock code Range Clear opening
(mm)		 Overall frame
(mm)		 Frame depth
(mm)		 Options My Wrekin
DMT0D4/4545/KHSQR Highway Ø 450 660 x 660 100
Highway D400 Halohinge lifting mechanism
Highway

Are you looking for hinged access covers?

An expansion of the Highway range, our hinge and lift out HaloHinge manhole covers can be safely removed using our unique safety keyways and standard BS 7903 lifting keys, but can also be hinged to 100°, where they are secured in place.

HaloHinge's innovative design incorporates inboard hinges (on the inside of the frame), this allows easy surfacing compaction against the straight edges of the frame whereas common alternatives, have protruding hinges that are difficult to compact around without damaging the hinge housing and covers foundation.

View Highway HaloHinge D400
ClickLift being installed
Manhole cover frame raising system

Clicklift compatible

Clicklift eliminates the time and resources required to dig out and reinstall frames to suit the final adoptable surface. This eliminates the potential damage to manhole covers during construction and removes the potential for residents claims for damage to their vehicles and massively reduces disruption. Clicklift provides housing developers with huge savings in terms of time, money and hassle. Allowing whole estates to have their covers raised to the final surfacing level, in as little as a few hours.

See how ClickLift can help you
Armadillo manhole cover protector shell installed
The hard hat for your ironwork

Armadillo compatible

Armadillo is a complete range of protector shells, designed to be placed over manhole covers and gully grates to provide enhanced protection during the construction phase.

Armadillo provides protection from construction site traffic, including tracked vehicles, and can be easily removed when the final surfacing is completed. This ensures manhole covers and gully grates can start their service life in ‘as new’ condition to optimise longevity.

Find out more about Armadillo

Related case studies

Related case study

Years of exceptional performance

Our Highway D400 covers are still operating at full capacity after three and a half years of being subjected to high levels of HGV traffic. Meaning the organisation can focus solely on new work, rather than being distracted by manhole covers that have failed prematurely and need fixing or, in some cases, reinstalling.

Scottish Water
Scottish Water
Read more
Related case study

Ensuring a smooth commute between Northern Ireland’s biggest cities

The Department for Infrastructure in Northern Ireland committed to funding a £185m ‘flagship’ infrastructure project to upgrade the A6, with the aim of reducing congestion and improving road safety. Richard Stewart, Regional Director ‑ UK North & Ireland at Wrekin Products, explains how a combination of excellent service and just in time deliveries secured an exciting opportunity to supply Highway® manhole covers and gully grates to such a significant project.

Department for Infrastructure Graham Construction Farrans
Department for Infrastructure Graham Construction Farrans
Read more
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