DM9 Exploded - UPDATE-web
DM9 Exploded - UPDATE-web


Manhole covers for highways

The DM9 is a new, longer rectangular D400 cover with a clear opening of 600x900mm. The DM9 is suitable for all DM400 locations according to EN124-2015 standards.

Personalisation of the covers can be added using logos. Additionally, the covers and frames can be made in different colours. All our composite D400 frames have a depth of 150mm, which is the minimum depth that ThruBeam recommends for D400 covers. The D400 range can be supplied with or without a lock and can be made watertight using our specifically designed seal.

The DM9 has a flat, high-grip tread pattern giving it standout anti-skid properties. It can be made watertight and can be supplied with or without a lock.

The Benefits of a ThruBeam composite cover over traditional covers.

  • High structural performance
  • Extended working life
  • Permanent anti-slip
  • Secure and lockable
  • Injury free removal
  • Reduced maintenance programmes
  • Sealing (optional)
  • Transparent to radio waves
  • Non-corrosive
  • Electrically non-conductive
  • Client design service

The DM9 is perfect for:

  • Petrol forecourts
  • Highways

DR90 – cover specifications

Load Rating EN124:2015 Class D400
Clear Opening 600 x 900mm (23 5/8” x 35 7/16“)
External dimensions 668 x 968mm x 127mm (26 5/16” x 38 1/8” x 5″)
Skid resistance (wet polishes) PSRV 60
Weight 45kg (99.2lb) Combined weight with frame 57kg (106.955lb)
Lifting points
Tread depth Tread depth complies with EN124:2015
Tread type Embedded aggregate – uni-directional
Wear indicators Four moulded
Markings Month, year and location of manufacture on the underside of cover. Cover class and weight on the top surface.
Corrosion / chemical resistance All component parts are resistant to chemical attack, diesel, petrol, salt and water or a combination of the above over the lifespan of the cover. Surface discolouration is acceptable in service
Combustion properties All component parts do not support combustion. Products of combustion do not contain harmful chemicals (e.g. bromides)
Sealed Yes (optional – can be retro-fitted)
Vented No
Carbon footprint Low
Material Advanced fibre glass composite
Client logo Can be provided on top surface
Security features Lock and security plug (lock cannot be left open on replacement of cover)

Designs and specifications are subject to alteration, so that continuous improvement can be undertaken

Frame specification

Load Rating EN124:2015 Class D400
Clear Opening DM9 – 600 x 900mm (23 5/8” x 35 7/16“)
Weight DM9 – 15.5kg (34.2lb)
External dimensions DM9 – 800 x 1100mm x 150mm (31 1/2” x 43 5/16” x 5 7/8“)
Material Advanced fibre glass composite
Installation Provided in full as a separate document

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