Manhole covers for highways

The DR76 has a clear opening diameter of 760mm and can be used can be used in Class D400 locations according to EN124-2015 standards. All the D400 range has been designed to resist the eccentric and horizontal forces that can rotated them and cause displacement of the cover. The DR range of covers will not spin or become dislodged from its frame as a result of traffic movement.

Personalisation of the covers can be added using logos. In addition 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. It can also be retrofitted.

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 DR76 is perfect for:

  • Petrol forecourts
  • Highways

Cover Specifications

Load Rating EN124:2015 Class D400
Clear Opening 760mm Diameter (30″)
External dimensions 814mm diameter (32″)
Skid resistance (wet polishes) PSRV 60
Weight 36kg (79.3lb)
Lifting points Single key housing (also available with pry points)
Tread depth Tread depth complies with EN124:2015 Class D400
Tread type Embedded aggregate – uni-directional
Wear indicators Four moulded
Markings Week, year and location of manufacture into underside of cover. Cover size, 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 (eg 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 Available on request

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

Frame specification

Load Rating EN124:2015 Class D400
Clear Opening 760mm Diameter (30″)
Weight 16kg (35.3lb)
External dimensions 964mm diameter (38″)
Material Advanced fibre glass composite
Security Designed to accept optional bolting system
Installation See installation page

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