GRP Heavy Duty Engineered Trough Covers

The Fibex GRP Heavy Duty Engineered Trough Covers are considerably lighter than concrete, saving you on installation time, transport costs, and machinery.

What are the uses of heavy rated GRP trough covers?

They each load up to 40 tonnes, so they are ideal to use in areas where there is heavy traffic, such as carriageways, hard shoulders and bus depots.

In addition, they can also be used as road plates.

Installation of Fibex GRP Heavy Duty Engineered Trench Covers

Our Heavy Duty Trench Covers can be fitted in the Fibex GRP Cable Troughs, a pre-laid concrete rebate or steel angle frame.

They can be supplied with the Fibex lifting handles for easy installation and removal.


Our GRP D400 Trough Covers are available in a range of lengths (300mm to 1000mm) and widths (600mm to 1800mm).

They have two countersunk bolt holes which are compatible with M12 bolts for a secure fit.

All of our GRP Heavy Duty Engineered Trough Covers have been independently tested and certified to BS EN124 loading classification.

Related products

Fibex Lifting Handles are available in several types: ‘I Type’, ‘Hook Type’, and ‘T Type’.


GRP Black Heavy Duty Engineered D400 Trough cover and lid

Additional information

Key benefits

  • Strong and durable
  • Lightweight
  • Cost-effective
  • Anti-slip
  • Zero maintenance
  • Non Corrosive
  • Non-Conductive
  • Easy removal for maintenance access

Applications & Specifications

Product Thickness (mm) Length (mm) Width (mm) Colour Bar Centres (mm) Hole Size Bar size (mm)  Weight (kg/m2) Panel Weight (kg)
D400 Trench Covers 300-1000 600-1800