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DBT0D4/4428/KT

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

Specification Knowledge base

Stock code Range Clear opening
(mm)		 Overall frame
(mm)		 Frame depth
(mm)		 My Wrekin Downloads
DBT0D4/4428/KT Tristar 445 x 280 565 x 400 100

Features

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

    PSRV tested

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

    Safety keyway

  • Non rocking 3-point suspension design, for silent operation.

    3 point suspension

  • Frame gussets are supports which reinforce the corners where the frame sections meet, distributing stress evenly, preventing damage to the frame or the access cover.

    Gussets icon

  • The high seating position ensures that forces are transmitted more directly downwards, meaning conversion of traffic loads into mortar-compatible compression forces.

    Cover support geometry

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

    Indexed corners

  • Holes in the frame flange where mortar can pass between the underside and top side, creating an interlock, providing greater strength.

    Mortar Apertures icon

  • Can be installed by a single person, providing labour cost savings.

    Single person lift

Images

Specification

General information

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

Standards, classes and groupings

Standards
BS EN 124-2
BS5834
BS750
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)

565 mm x 400 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

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
KEY/LONG Large cover lifting keys with a long handle (sold as a pair)
KEYS/L Small cover combined lifting key
  1. Wrekin Products Ltd is continually seeking to improve our products and therefore reserves the right to alter product specifications without prior notice.
  2. It is the responsibility of all users to satisfy themselves the above data is current.
  3. All values stated are nominal within 2.5% tolerance.
  4. Installation details are available in the knowledge base.
  5. All Wrekin products are supplied subject to our Terms and Conditions of Sale.
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