My Wrekin


Hercules D400 manhole cover 1200mm x 1200mm clear opening with 150mm frame depth

Manhole covers - Square

Stock code Range Overall frame
(A x B)
Clear opening
(C x D)
Frame depth
Base opening
(F x G)
Datasheet My Wrekin
DMT0D6/1212/4 Hercules 1,385 mm x 1,385 mm 1,200 mm x 1,200 mm 150 mm 1,230 mm x 1,230 mm
  • 60+PSRV tested at top surface of chequer by UKAS accredited 3rd party.

    PSRV tested
  • Anti-flex covers prevent the causes of cover seating wear, eliminating excessive noise and catastrophic failure.

    Anti-flex cover
  • Specially designed cover support geometry reduces movement relative to the frame, minimising seating wear.

    Cover support geometry
  • Enlarged frame corners help to dissipate, load minimising bearing pressure.

    Enlarged frame corners
  • Indexed covers ensure correct fit first time, every time.

    Indexed corners
  • Inspection window allows safe and easy view into chamber.

    Inspection window
  • Mechanical lifting points are provided.

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

    Safety keyway

Product images

Product drawings

General information

Stock code
Primary material
Ductile iron
Manhole cover

Standards, classes and groupings

BS EN 124
CD 534
BS EN 124 Class
BS EN 124 Group


Frame shape
Manhole shape
Overall frame length (A)
1,385 mm
Overall frame width (B)
1,385 mm
Clear opening length (C)
1,200 mm
Clear opening width (D)
1,200 mm
Frame depth (E)
150 mm
Base opening length (F)
1,230 mm
Base opening width (G)
1,230 mm


BS EN 124 and CD 534 apply to products with a clear opening up to 1 metre. The Hercules range of access covers have a clear opening greater than this, however load capability and design features exceed the requirements of these documents.

Please note that Hercules 1,200 x 1,200mm cover is the only cover in the range to have keyholes for manual lifting.

All values stated are nominal within 2.5% tolerance.


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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. Installation details are available on request.