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DGHT0D4/4545/KU

Unite D400 3 flange gully grate clear opening 450mm x 450mm clear opening with 100mm frame depth

Specification Knowledge base

Stock code Range Clear opening
(mm)		 Base opening
(mm)		 Overall frame
(mm)		 Frame depth
(mm)		 Waterway area
(cm²)		 Options My Wrekin Downloads
DGHT0D4/4545/KU Unite 450 x 450 475 x 475 670 x 580 100 1,250

Features

  • Both covers of the double triangular grating feature universal beams that interlock to provide high rigidity while still allowing the grating to hinge as one unit.

    Beam in beam design

  • Captive hinges deter theft and allow safe, easy lifting during maintenance.

    Captive hinges

  • Enlarged corners spread loads evenly across the foundation, enhancing reliability and lifespan.

    Enlarged frame corners

  • Hinged in 3 directions

  • Built-in lifting points allow safe mechanical lifting, reducing manual handling and improving on-site safety.

    Mechanical lifting point

  • Allows the grating to hinge in the direction of traffic flow, improving safety during access.

    Reversible hinge

  • Hold covers securely open to prevent accidental closure during access.

    Safety stop hinges

  • Pedestrian safe

  • Available with a 10-year warranty for lasting confidence and proven performance (subject to terms).

    Unite 10 year warranty

  • 3 point seating

  • Strengthened corners dissipate loading stresses effectively, providing long-term durability and preventing damage to the frame and cover.

    Gussets icon

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

    Indexed corners

  • Integrated keyway frame lifting points provide safe and secure handling.

    Keyway lifting point in the frame

  • Frame holes allow mortar to flow through the flange, creating a strong mechanical bond for added stability.

    Mortar Apertures icon

  • Smooth, rounded edges reduce stress points and help prevent cracking around the frame.

    Rounded frame flange

  • I-beam structure increases rigidity and reduces seat wear for a longer service life.

    Universal beam icon

  • Meets the requirements of CD 534 v0.2.0.

    CD 534 v0.2.0 logo

Images

Specification

General information

Stock code
DGHT0D4/4545/KU
Primary material
Ductile iron
Range
Unite
Category
Gully grate
Flanges
3

Standards, classes and groupings

Standards
BS EN 124-2
DMRB
MCHW
CD 534 v0.2.0
BS EN 124 Class
D400
BS EN 124 Group
3
4
Third party certified
Kitemark
CD 526 hydraulic capacity
Q

Dimensions

Frame shape
Rectangular
Manhole shape
Rectangular
Overall frame (A x B)

670 mm x 580 mm
Clear opening (C x D)

450 mm x 450 mm
Frame depth (E)
100mm
Base opening (F x G)

475 mm x 475 mm
Waterway area
1,250cm²

EPD Data

Total life cycle (cradle to grave)
105.46 kg CO₂ equivalent
Download EPD Data
BRE Greenbook Live
BRE Verified Logo

Available options

Accessories

Stock code Description My Wrekin
PC/UNIFORM/151076 Uniform chamber adjustment unit 760mm x 100mm x 15mm
PC/UNIFORM/251076 Uniform chamber adjustment unit 760mm x 100mm x 25mm
PC/UNIWEDGE/755012 Uniform support wedge 120mm x 50mm x 75mm
YPCR/U12.5 12.5Kg Unipak® rapid curing polyester resin mortar
YPCR/U25 25Kg Unipak® rapid curing polyester resin mortar
SCREWLIFT Simple and rapid manhole frame levelling system. Simply push the bushes into the holes in the flange and adjust the levelling screws to the required height.

Downloads

BIM model - DGHT0D4-4545-KU - 491.ifc
BIM File-Login required
Kitemark Certificate.pdf
Certificate-pdf
Unite range specification clauses.pdf
Specification clause-Login required
Wrekin BRE Verified EPD Unite Range.pdf
Environmental Product Declaration (EPD)-Login required

Notes

The D400 load capability of these Group 3 products also offers the benefit of making them suitable for exposure to Group 4 traffic types. Where 3-flange D400 Gully Grate assemblies are employed, we recommend that they are installed against a kerb, not in an open highway location.

Fully compliant with the requirements of specification clause 6.2.47 of Cycle Infrastructure Design Local Transport Note 1/20.

Knowledge base

Access cover being installed

Knowledge Base / Frequently Asked Questions

Ductile iron access cover FAQs

Frequently asked question questions about our ductile iron access cover range of products.
Access cover being installed

Knowledge Base / Installation guides

Seal plate installation guide

Unite's retrofittable seal plates are unique to the industry as all but one variant can be retrofitted on site after installation of the Unite manhole cover assembly. This installation works your through the steps involved for a correct installation.
Access cover being installed

Knowledge Base / Standards and conformity

CD 526 hydraulic capacity classifications

A guide to the ‘P, Q, R, S & T,’ ratings are classifications listed in Highways England DMRB document CD 526 and how they are calculated to indicate a gully grating’s hydraulic capacity (or effectiveness at evacuating water from a hard standing area. e.g. carriageway).
Access cover installation

Knowledge Base / Standards and conformity

Operation and maintenance of BS EN 124 ironwork

The complete operation and maintenance (O&M) manual for all Wrekin BS EN 124 ironwork.
Access cover being installed

Knowledge Base / Product and specification guidance

Ductile iron product symbols

Guidance on the symbols and iconography displayed on Wrekin ductile ironwork.
Access cover being installed

Knowledge Base / Product and specification guidance

What information is on product labels?

A handy guide showing the information on our product labels. This information will help you identify what products you have when picking, packing or installing on-site.
Road resurfacing

Knowledge Base / Product and specification guidance

On-site coating of ductile cast iron parts

Where the loss of barrier coatings has occurred, usually through trafficking and/or light corrosion, a site-applied paint coating may be successfully brush-applied to refresh the surface finish of ductile iron parts.
Access cover being installed

Knowledge Base / Product and specification guidance

How manhole covers and gully grates are measured

Learn how to accurately measure manhole covers and gully grates with our helpful guide.
Access cover being installed

Knowledge Base / Standards and conformity

Understanding BS EN 124 groups and classes

BS EN 124:2015 divides access covers and gully grates into classes by static test load. It also categorises the various places where they may be installed from Group 1 to Group 6. This article will guide you through the groups and classes.
Road resurfacing

Knowledge Base / Product and specification guidance

ID badging and antenna options (RFID, NFC, IoT)

A large number of our Unite and Highway covers provide the facility for a retrofittable badge to be installed in the cover, without the need for welding. In addition, this location can also be used to install communications antennas within the cover, removing the need to adjust the surrounding road surface.

This article discusses the potential applications of this technology.
Access cover being installed

Knowledge Base / Standards and conformity

A guide to conformity marking and voluntary third-party certification

Helpful information that guides you through applicable conformity marking and voluntary third-party certification requirements in the UK.
Access cover being installed

Knowledge Base / Product and specification guidance

Surface oxidation on ductile iron castings

Guidance on surface oxidation on iron castings, including what our covers are coated with and why we do this.
Access cover hero image

Knowledge Base / Product and specification guidance

Manhole cover range comparison chart

A comprehensive feature comparison of our market leading Tristar, Highway and Unite ranges of access cover.
Access cover being installed

Knowledge Base / Product and specification guidance

Pedestrian and cycle friendly gully gratings

Whilst BS EN 124 provides no definition for a ‘Pedestrianised’ grating, there is an allowance in the Standard to reduce drainage apertures down to 5mm wide, where these may be preferred. This knowledge base article will help you to understand more about pedestrian friendly gratings.
  1. All information provided is subject to change without notice. While every effort is made to ensure accuracy and relevance, Wrekin Products Ltd. does not warrant the completeness or reliability of the information contained herein. Photographs, illustrations, and other visual materials are provided for illustrative purposes only.
  2. Wrekin Products Ltd. reserves the right to make design amendments or improvements to any product at any time, where such changes enhance performance or durability, without affecting compliance with the stated standards.
  3. Where errors or omissions are identified, amendments will be made as quickly as possible.
  4. It is the responsibility of all users to satisfy themselves the above data is current.
  5. All values stated are nominal within 2.5% tolerance.
  6. Installation details are available in the knowledge base.
  7. All Wrekin products are supplied subject to our terms and conditions of sale.
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