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DBT0D4/4428/KH

Highway D400 surface box 445mm x 280mm clear opening with 100mm frame depth

Features

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

    Enlarged frame corners
  • Safety keyways prevent accidental lifting key disengagement during handling for safer operation.

    Safety keyway
  • Independently tested by a UKAS-accredited laboratory to achieve a PSRV value of 70+ on the chequer surface.

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

    Mechanical lifting point
  • Non-rocking three-point suspension provides stable seating for silent, reliable operation.

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

    Gussets icon
  • Directs forces vertically to convert traffic loads into mortar-compatible compression forces.

    Cover support geometry
  • 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
  • Lightweight design allows safe installation by a single person, reducing labour costs.

    Single person lift
  • Texturing above and below the flange improves mortar grip and reduces lateral movement and cracking.

    Textured mortar engagement flange surface
  • Meets the requirements of CD 534 v0.2.0.

    CD 534 v0.2.0 logo

Images

Specification

General information

Stock code
DBT0D4/4428/KH
Primary material
Ductile iron
Range
Category
Surface box
Flanges
4

Standards, classes and groupings

Standards
BS EN 124-2
BS750
BS5834
DMRB
MCHW
CD 534 v0.2.0
BS EN 124 Class
D400
BS EN 124 Group
4
Third party certified
Kitemark
BS 5834 Grade
A
BS 750 Grade
A

Dimensions

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

680 mm x 515 mm

Clear opening (C x D)

445 mm x 280 mm

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

465 mm x 300 mm

EPD Data

Total life cycle (cradle to grave)
75.61 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/U6.5 6.5Kg Unipak® rapid curing polyester resin mortar
GRITBLOCKER Anti-blockage keyway insert
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.
KEYS/L Small cover combined lifting key
KEYS/LONG Large cover lifting keys with a long handle

Knowledge base

  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.