Fibergrate ThruBeam DR90 D400 Composite Manhole Cover and Frame

Fibergrate ThruBeam DR90 D400 Composite Manhole Cover and Frame

ThruBeam DR90 D400-rated GRP access cover and frame for a 900mm round clear opening. Combined cover and frame weight: 61 kg.

The Fibergrate ThruBeam DR90 is a D400 load rated GRP composite access cover supplied complete with its frame, sealed as standard. Suitable for carriageways, car parks, forecourts and industrial areas, it offers the strength of cast iron at a fraction of the weight.

Specifications

Why choose ThruBeam composite covers

• D400 load rated for installation in carriageways, roads, industrial areas and other heavy-duty traffic applications.
• Up to 75% lighter than traditional cast iron, helping reduce manual handling risks and improving installation efficiency.
• Corrosion resistant GRP construction that will not rust and is suitable for aggressive environments including water, wastewater, coastal and industrial applications.
• Non-conductive material, making the covers suitable for electrical and utility infrastructure applications.
• Slip resistant surface designed to provide secure footing in wet and dry conditions.
• Sealed as standard to help minimise water ingress, odour escape and debris contamination.
• Low whole-life cost with no requirement for painting, coating or ongoing corrosion maintenance.
• Easy installation due to reduced weight and simplified handling compared with traditional materials.
• UV stable construction suitable for long-term outdoor use.
• Manufactured in the UK with short lead times and technical support from Fibergrate.
• Compatible with Fibergrate lifting accessories for safe and efficient cover removal.
• Optional vented and specialist configurations available on request.

Covers are supplied sealed as standard. Vented versions and twin cover frames are available on a project basis, please contact us. Typical lead time is one week from order.

Download the ThruBeam specification and installation guide (PDF)