PRODUCT

Heavy Duty GRP Access Cover

High Load-Bearing Composite Access Covers Engineered for Infrastructure Demands

Heavy duty GRP access cover D400 rated for road and highway applications
EN124 D400 Lightweight Anti-Theft
Load Rating
400kN
EN124 D400 rated for road use
Weight
65% Lighter
Than cast iron equivalents
Service Life
30+ Years
Corrosion-resistant durability
Max Size
1200mm
Custom sizes available

Gallery

Heavy duty GRP access cover D400 rated for road and highway applications
D400 Rated Heavy Duty GRP Cover
GRP access cover size and dimension options
Standard Size Options
Heavy duty GRP access cover installation on construction site
On-Site Installation
SMC manhole cover quality control and testing in factory
Product View 4

Product Overview

Engineered for Maximum Load-Bearing Performance

Our heavy duty GRP (Glass Reinforced Polymer) access covers are precision-engineered using advanced composite materials to deliver exceptional load-bearing capacity while maintaining a fraction of the weight of traditional cast iron or concrete alternatives. Manufactured in accordance with EN124 standards, these covers provide reliable performance in the most demanding infrastructure applications.

The unique glass fiber reinforcement matrix combined with premium polyester resin systems creates a product that excels in both mechanical strength and environmental resistance. Each cover undergoes rigorous quality control testing including load verification, dimensional inspection, and material composition analysis to ensure consistent performance across every production batch.

Available in a comprehensive range of sizes from 300 x 300 mm to 1200 x 1200 mm with load ratings spanning EN124 Class A15 (pedestrian) through Class F900 (airport pavements). Our heavy duty GRP access covers are the preferred choice for engineers and contractors seeking a durable, lightweight, and cost-effective access solution for roads, highways, industrial facilities, and critical infrastructure projects worldwide.

GRP access cover construction showing composite material design and frame integration

BS 4211 HDG Q235B

Specifications

Ficha Técnica

Heavy duty GRP access cover technical specifications chart

Specifications Diagram

Dimensions

Please refer to the dimensional drawing for detailed measurements and installation clearances.

500mm clear width 250mm rung spacing 20mm rung dia. 150mm wall clearance
Parameter Value
Material GRP (Glass Reinforced Polymer) — SMC Compression Molded
Load Rating EN124 D400 (400 kN / 40 tonnes)
Standard Sizes 600x600 mm, 750x750 mm, 900x900 mm, 1200x1200 mm
Weight (600x600) 28 kg (vs 82 kg cast iron equivalent)
Surface Finish Anti-slip diamond pattern / chequer plate
Temperature Range -40°C to +120°C
Corrosion Resistance Excellent — UV stabilized, chemical resistant
Frame Type Galvanized steel frame / GRP frame options

Features

Características y Ventajas

GRP access cover manufacturing process with SMC hydraulic press

Key Features Overview

Exceptional Strength-to-Weight Ratio

Our heavy duty GRP access covers deliver EN124 D400 load ratings at only 35% of the weight of equivalent cast iron covers, reducing installation labor costs and eliminating the need for heavy lifting equipment on site.

Corrosion & Chemical Resistance

The GRP composite construction is inherently resistant to corrosion, rust, and chemical attack from road salts, oils, fuels, and wastewater. Unlike steel or cast iron, our covers will not degrade in harsh environmental conditions.

Anti-Theft Design

GRP access covers have negligible scrap value, eliminating the theft risk that plagues cast iron covers. Optional locking mechanisms and concealed fastening systems provide additional security for sensitive installations.

EN124 Certified Compliance

Every cover is manufactured and tested to meet EN124 load rating standards. Certificates of conformity are available for all load classes from A15 through F900, ensuring full regulatory compliance for your project.

Anti-Slip Safety Surface

The molded diamond pattern or chequer plate surface provides exceptional pedestrian and vehicle traction in all weather conditions, exceeding UK Health & Safety anti-slip requirements for access covers.

Custom Manufacturing Available

We offer custom sizes, load ratings, colors, branding, and frame configurations to meet specific project requirements. Minimum order quantities apply for custom specifications.

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