Technical & Standards
Specifications, load classes & standards
Everything specifiers and procurement teams need to select the right FRP/GRP cover with confidence.
Load Ratings Explained
Which load class do you need?
Load class describes the maximum traffic load a cover is designed to carry. Fibrox covers span five grades — pick by where the cover will be installed.
Tonnage (MT) values are the Fibrox grade ratings; EN 124 designations (A15-D400) are shown where applicable. For applications beyond D400 or project-specific load requirements, please contact our technical team.
Material Comparison
FRP/GRP vs RCC vs CI/DI
How composite covers compare with conventional reinforced concrete and cast/ductile iron across the parameters that matter for infrastructure.
| Parameter | FRP / GRPFibrox | RCC | CI / DI |
|---|---|---|---|
| Life Span | Very High | Medium | High |
| Strength / Weight Ratio | Excellent | Low | Moderate |
| Load Bearing Capacity | High | Moderate | Very High |
| Corrosion Resistance | Excellent | Low | Medium |
| Chemical Resistance | High | Low | Medium |
| Water Absorption | Negligible | High | None |
| UV Resistance | High | Medium | Medium |
| Surface Finish | Smooth & Premium | Rough | Metallic |
| Colour Options | Customizable | Limited | Limited |
| Logo Embossing | Easy | Difficult | Possible |
| Locking System | Available | Limited | Available |
| Installation | Easy & Lightweight | Heavy | Heavy |
| Maintenance | Very Low | Moderate | High |
| Thermal Expansion | Minimal | Moderate | High |
| Electrical Conductivity | Non-Conductive | Low | Conductive |
| Eco-Friendly | Sustainable Material | Moderate | Low |
Quality Assurance
Tested for the field
Quality checks across load, dimensions, material integrity and marking before dispatch.
Load Verification
Each design is matched to its rated load grade (2.5-40 MT) so the cover performs safely under its specified traffic class.
Dimensional Accuracy
Clear opening, frame seating and overall dimensions are checked so covers seat correctly and match chamber openings.
Material Integrity
Non-brittle composite with zero free fibers, high flexural modulus and excellent corrosion and chemical resistance.
Permanent Marking
Identification, load class and standards are embossed for permanent traceability per IS 1726 / EN 124.
Installation
Recommended installation procedure
- 1Handle covers and frames carefully to avoid damage to corners and edges.
- 2Ensure the clear opening of the frame is not smaller than the chamber.
- 3Keep the clear opening of the frame and chamber equivalent.
- 4Set the top level of the frame to match the finished road level.
- 5Apply a bedding of cement mortar around the frame for stable seating.
- 6Compact properly around the frame to avoid movement and settlement.
Download technical catalogue
Full product specifications, load tables and dimensions in a single PDF.
[ADD: link catalogue PDF]
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