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Highway

Highway is our most versatile range of iron manhole covers and gully grates. With a vast variety of sizes and options available, we have a solution for even the most complex project.

All Highway products have been manufactured from highly durable, ductile iron to provide you with a quality, long lasting solution.

D400 Highway installed in housing estate

Fully featured and comprehensive range

Our Highway ironwork range is durable, reliable, simple to specify, easy to install and operate. We know from talking to our customers they value high quality products with straightforward ranges and support on hand to help select the right solution.

The range is a triumph of engineering, practicality and simplicity. Available in a variety of sizes and depths, Highway has been thoughtfully designed and engineered to be the easiest range of manhole covers, gullies and ancillary products to specify and install on the market

The range exceeds the most demanding standards and guidelines from national highway authorities and is fully compliant with the most rigorous specification standards, including BSI Kitemark, CD 534 v0.1.0 (formerly HA 104/09), BS 7903 and BS EN 124:2015.

BS EN 124, CD 534 v0.1.0, Kitemark


The Highway range includes:

  • E600 double triangular manhole covers
  • D400 double triangular manhole covers
  • E600 HaloHinge manhole covers
  • D400 HaloHinge manhole covers
  • D400 3 flange gully grates
  • D400 4 flange gully grates
  • D400 4 flange V gully grates
  • D400 surface boxes

Highway in numbers

Highway products sold in past 5 years.

Over 350,000

kilograms of Highway products installed in past 5 years

22million

available (see terms)

2year warranty

Meeting the needs of National Highways CD 534 v0.1.0 with Highway

National Highways has updated CD 534, a significant set of its requirements for manhole covers and gully grates installed on their road network. First released in February 2020 and updated to version 0.1.0 as of May 2022.

Frame flange area

CD 534 v0.1.0 now sets a minimum flange area of 190,000mm² for D400 and 285,000mm² for E600 covers, this equates to 2.1N/mm² as in HA 104/09.

Frame depth and weight

A 150mm frame depth is now required on motorways and all purpose trunk roads. A lower limit frame weight is also specified to ensure frames are stiff enough.

Skid resistance

The WRc test mehod is now the only accepted test method for calculating skid resistance on raised chequer. This test measures a small tyre’s resistance to sideways slip caused by the cover surface.

D400 or E600

E600 manhole covers are to be installed in place of D400 covers where the Annual Average Daily Traffic (AADT) of light goods vehicles travelled on a road is greater than 1,500 in each direction.

Check road traffic statistics for AADT

Standard 2 year warranty

Wrekin standard 2 year warranty

Peace of mind with our standard 2 year warranty

When adopted by a local authority our Tristar and Highway D400 and E600 manhole covers and gully gratings are covered by our standard 2 year warranty. This covers defects of the seating, load bearing capacity and permanent set.

Warranty information

 

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

HaloHinge product render
HINGE AND LIFT OUT

Highway HaloHinge manhole covers

Highway HaloHinge manhole covers offer all the benefits of the Highway range with the additional benefit of the Hinge and Lift Out mechanism, allowing the covers to be hinged to 100° and also completely removed with standard BS 7903 lifting keys when required.

Traffic on a busy London road

> 1,500 Annual Average Daily Traffic (AADT)?

With the introduction of CD 534 there were several key changes. This includes the requirement for E600 manhole covers to be installed in place of D400 covers where the Annual Average Daily Traffic (AADT) of light goods vehicles travelled on a road is greater than 1,500 in each direction.

As a "rule of thumb", most A roads will have an annual average daily traffic number over 1,500 light goods vehicles. Full traffic data can be found for many locations around the UK on the Government website.

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.

Armadillo manhole cover protector shell in place
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.

Highway in action

Contact us

Contact us

Whether you are looking for live project support, or are in the initial stages of specification, we are always on hand and happy to help.

Related case studies

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
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Case study

Aberdeen Western Peripheral Route (AWPR)

The Aberdeen Western Peripheral Route (AWPR) will provide a new strategic road link to improve travel in and around Aberdeen and the north east of Scotland. It will take through traffic out of the “Granite City”. Linking Stonehaven at its southern end with Tipperty at the north, the bypass had been built by the Connect Roads consortium, consisting of Balfour Beatty, Carillion and Galliford Try (Morrison Construction).

Transport Scotland /Aberdeen City and Aberdeenshire Councils
Transport Scotland /Aberdeen City and Aberdeenshire Councils
Read more