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Highway D400 HaloHinge Manhole Covers

Highway HaloHinge D400 has been specifically designed and produced to meet the advanced requirements of National Highways CD 534 v0.1.0. This product is ideal for group 4 applications. The Hinge and Life Out mechanism allows the covers to be safely removed by using our unique safety keyways and standard BS 7903 lifting keys. Additionally, they can be hinged up to 100 degrees and securely locked, which promotes better safe working practices.

Highway D400 halo hinge
HaloHinge locking feature

Hinge and Lift Out

HaloHinge boasts an innovative design. The covers are fully removable using standard BS 7903 lifting keys, but the covers can also hinge to 100 degrees, remaining captive within the frame and free from risk of accidental closure.

The hinges are located on the inside of the frame. This simple yet unique design allows for the infill surfaces to be compacted against the straight edges of the frame with ease, unlike other alternatives that have protruding hinges that are difficult to compact around. Compacting equipment over the hinge housing can apply destructive forces to the hinge housing and foundation, making inboard hinges a superior solution.

Moreover, the inboard hinges prevent hinge pockets from clogging with dirt and debris, ensuring that the hinges operate reliably and promote better health and safety. Additionally, Highway HaloHinge covers are compatible with GritBlocker, the anti-blockage keyway insert that provides unblocked keyways at every operation.


  • Covers open sequentially, with standard BS7903 lifting keys.

    Sequential cover opening
  • Safety-stop hinges prevent covers from falling once opened.

    Safety stop hinges
  • Concealed hinges prevent debris entering the hinge and limiting its movement.

    Anti-debris hinge
  • Hinges are concealed within the bounds of the frame. This means during installation the hinges aren't exposed during compaction of the surround and are unlikely to be blocked by debris.

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

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

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

    CD534 v0.1.0
  • 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

Square or rectangular manhole covers

Stock code Range Clear opening
Overall frame
Frame depth
Options My Wrekin
DMHT0D4/6045/KH Highway 600 x 450 810 x 660 100
DMHT0D4/6060/KH Highway 600 x 600 815 x 815 100
DMHT0D4/6767/KH Highway 675 x 675 890 x 890 100
DMHT0D4/7560/KH Highway 750 x 600 960 x 810 100
DMHT0D4/7575/KH Highway 750 x 750 960 x 960 100
DMHT0D4/9060/KH Highway 900 x 600 1,110 x 810 100
DMHT0D4/9090/KH Highway 900 x 900 1,115 x 1,115 100
DMHT0D6/6060/KH Highway 600 x 600 815 x 815 150
DMHT0D6/6767/KH Highway 675 x 675 890 x 890 150
DMHT0D6/9060/KH Highway 900 x 600 1,110 x 810 150
Retrofittable identification bolt being installed in a Unite access cover
Only with Wrekin

Retrofittable badging and antenna options

Unite* and Highway access covers are the only ranges on the UK market to include provisions for communications equipment, such as antennas, to be installed within the cover.

Antenna in cover linked to hardware in chamber

The ID bolt provision can be used for antennas, allowing communications equipment, such as water meter monitoring, to be installed within a chamber beneath a cover whilevproviding a strong signal above ground without the need to dig or adjust the surrounding road surface. Saving significant time, effort and money while minimising disruption.

* references ending /KUE

Highway double triangular

Looking for double triangular access covers?

Designed and manufactured to meet the enhanced requirements of National Highways 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 longevity as standard.

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