GRP Grating For Industrial & Infrastructure Applications
GRP grating is manufactured from glass reinforced plastic (GRP), also referred to as fibreglass grating or FRP grating. It is widely specified where corrosion resistance, slip resistance and reduced maintenance requirements are important design considerations.
Applications include industrial flooring, access platforms, rooftop walkways, service gantries, water treatment facilities, offshore installations and public infrastructure projects.
Available in a range of panel depths, mesh sizes and resin systems, GRP grating can be selected according to loading requirements, support centres and operating conditions.
Types of GRP Grating
We Supply
Three common forms of GRP grating are available, each suited to different loading, span and application requirements.
- Moulded GRP Grating – A bi-directional mesh system formed from interwoven glass fibres and resin. Ideal for general industrial walkways, platforms and chemical environments where corrosion resistance is critical.
- Pultruded GRP Grating – Designed for longer spans and higher load requirements. Manufactured with high fibre content load-bearing bars, offering increased stiffness and structural capacity.
- Mini Mesh GRP Grating – Featuring a reduced aperture size for improved pedestrian safety and enhanced underfoot comfort. Commonly specified for public access routes, rooftop walkways and areas requiring heel-safe flooring.
Each system is available in multiple thicknesses and resin formulations to meet specific load, span and compliance requirements.
Lightweight
Corrosion Resistant
Slip Resistant
Non-Conductive
Low Maintenance
Long Service Life
Moulded GRP Grating
Moulded GRP grating is manufactured using continuous interwoven glass fibres fully encapsulated within a high-strength resin matrix. This process creates a bi-directional structural mesh, providing consistent load distribution in both directions.
Its uniform construction makes it particularly suitable for environments exposed to moisture, chemicals and corrosive conditions. The open mesh design allows effective drainage while maintaining slip resistance in wet and external environments.
Best suited for:
- Industrial walkways
- Access platforms
- Service riser flooring
- Trench covers and service ducts
- Offshore, marine and chemical processing environments
Available in multiple panel depths and mesh configurations, moulded GRP grating can be specified according to loading requirements, support centres and operating conditions. Typical applications include industrial flooring, access platforms, service ducts and external walkways.
Typical panel depths include 25mm, 38mm and 50mm, with mesh sizes selected according to pedestrian access requirements, loading criteria and operating conditions.
Common mesh configurations include 38mm square mesh and mini mesh variants where reduced aperture sizes, heel-safe flooring or improved pedestrian comfort are required.
Pultruded GRP Grating
Pultruded GRP grating is designed for applications requiring higher load capacity and extended span performance. Unlike moulded grating, pultruded systems use high glass-fibre content structural bearing bars aligned in a single direction, delivering exceptional strength and stiffness along the primary span.
This unidirectional load performance makes pultruded grating particularly suitable where deflection control and structural rigidity are critical.
Its lightweight construction reduces installation weight compared to steel alternatives, while maintaining resistance to corrosion, chemicals and environmental exposure.
Best suited for:
- Heavy-duty ramps
- Access bridges
- Elevated walkways
- Load-bearing platforms
- Long-span structural applications
Pultruded GRP grating is typically specified where moulded panels do not meet required span or load criteria.
Pultruded grating is commonly selected where longer unsupported spans are required and where deflection limits are a key design consideration.
Mini Mesh GRP Grating
Mini mesh GRP grating is manufactured with a smaller aperture configuration to reduce open area and improve surface coverage. This makes it ideal for pedestrian safety, wheelchair access and environments where small tools or objects must be prevented from falling through the flooring system.
The tighter mesh pattern enhances underfoot comfort and slip resistance while maintaining the corrosion resistance, strength and durability expected from GRP grating systems.
Best for:
- Rooftop walkways
- Public access routes & footbridges
- Anti-slip platforms
- Schools, leisure and commercial environments
- Areas requiring heel-safe or small-aperture flooring
Mini mesh grating is commonly specified where heel-safe flooring is required or where small objects must be prevented from passing through the grating surface.
GRP Grating Specifications & Performance Characteristics
| Characteristic | Description |
|---|---|
| Slip Resistance | Available with gritted or concave walking surfaces for use in wet, oily and external environments. |
| Corrosion Resistance | Resistant to moisture, saltwater and many industrial chemicals. Does not rust or require protective coatings. |
| Weight | Significantly lighter than steel alternatives, reducing handling and installation requirements. |
| Electrical Conductivity | Non-conductive material suitable for electrical installations, substations and utility environments. |
| Fire Performance | Fire-retardant resin systems available where project requirements demand enhanced fire performance. |
| Surface Finishes | Available with gritted and concave walking surfaces depending on slip resistance requirements. |
| Panel Depths | Common panel depths include 25mm, 38mm, 41mm solid top and 50mm. |
| Mesh Configurations | Available in standard mesh and mini mesh formats to suit different applications and pedestrian requirements. |
| Resin Systems | Orthophthalic, Isophthalic and Vinyl Ester resin systems available depending on environmental conditions and chemical exposure requirements. |
| Maintenance Requirements | No painting, galvanising or corrosion treatment required. |
| Alternative Terminology | GRP grating is also commonly referred to as fibreglass grating or FRP grating. |
| Typical Applications | Industrial flooring, walkways, access platforms, rooftop access, water treatment facilities, offshore installations and infrastructure projects. |
Associated Access Products
Explore our range of moulded, pultruded and specialist GRP grating systems, along with complementary access products for complete walkway and platform solutions.
GRP Grating Applications
Typical applications include industrial flooring, rooftop walkways, access platforms, service gantries, water treatment facilities, offshore installations and public infrastructure projects.
GRP Grating FAQs
GRP grating (Glass Reinforced Plastic), also known as fibreglass or FRP grating, is a lightweight composite flooring system manufactured using continuous glass fibres set within a thermosetting resin matrix. It is designed to provide high strength, slip resistance and corrosion resistance for industrial walkways, platforms, access flooring and safety systems across commercial and infrastructure environments.
GRP (Glass Reinforced Plastic) and FRP (Fibre Reinforced Plastic) are closely related composite materials. In the UK, the term GRP is more commonly used, while FRP is widely used internationally and within engineering specifications. Both refer to high-strength composite grating systems reinforced with glass fibres and resin.
GRP grating does not rust, corrode or degrade in wet, chemical or marine environments, unlike steel. It is significantly lighter, easier to handle and install, and requires minimal maintenance over its lifespan. In safety-critical environments, its anti-slip surface and non-conductive properties also provide important advantages over traditional steel walkway systems.
Yes. GRP grating is available in multiple thicknesses (25mm, 38mm, 41mm and 50mm), mesh sizes and resin formulations to suit different load and span requirements. Custom panel sizes, colours and fire-retardant or chemical-resistant resin options can also be supplied to meet specific project specifications.
Yes. GRP grating is highly resistant to UV exposure, moisture and temperature variation, making it ideal for outdoor walkways, rooftop access systems, ramps and marine environments. Its gritted, anti-slip surface maintains traction even in wet or icy conditions.
Yes. Full in-house design, fabrication and professional installation services are available across the UK. This includes supporting steelwork design, detailing, on-site assembly and complete access system installation.
GRP grating typically provides a service life of 25–50 years or more, depending on environmental conditions. Because it does not rust, rot or warp, it offers long-term structural performance with very low maintenance requirements.
GRP grating has a high strength-to-weight ratio. While steel may offer greater rigidity in certain structural applications, GRP provides sufficient load-bearing performance for most industrial access systems while offering superior corrosion resistance, reduced weight and improved slip safety.
The correct thickness depends on span, load requirements and application.
- 25mm – pedestrian walkways and light-duty access
- 38mm – general industrial flooring and platforms
- 41mm solid top – enclosed surface requirements
- 50mm – heavy-duty or longer-span applications
Load and span calculations can be provided to ensure the correct specification.
Yes. GRP grating can be cut and adjusted on-site using appropriate carbide or diamond-tipped tools. No hot works are required, which improves installation safety and reduces site risk.
Fire-retardant resin systems are available to meet recognised UK and industrial safety standards. These formulations help limit flame spread and reduce smoke development in fire-risk environments.
Yes. GRP is electrically non-conductive, making it suitable for substations, rail infrastructure, utilities, data centres and other high-voltage environments where metal flooring systems would pose a risk.
Standard colours typically include grey, green and yellow. Additional colours can be supplied depending on resin type, specification and order volume requirements.
Get a GRP Grating Quote →
If you have a question, enquiry or require a bespoke solution, please don’t hesitate to ask.