What is FRP grating?
FRP grating is a grid-shaped panel made with fiberglass roving as the reinforcement and unsaturated polyester resin as the matrix, formed by compression molding or pultrusion. It is a type of FRP composite product.
During manufacture the glass fibre and resin are fully combined into an integral structure that is strong and light, with a regular grid surface that provides both load-bearing capacity and slip resistance.
FRP grating is commonly used as a structural material for industrial platforms, walkways, trench covers and flooring, and is a familiar corrosion-resistant structural component in the chemical, power and environmental protection industries.
Compared with steel grating, its main features are corrosion resistance, low weight and non-conductivity; in damp, acidic or alkaline environments it does not rust even in long service.
How much load can FRP grating carry?
The load capacity of FRP grating depends mainly on the resin type, glass fibre content, mesh size and panel thickness. Different specifications correspond to different load classes, and manufacturers supply the relevant load tables.
Standard specifications meet the routine loads of walkways and maintenance platforms, while heavy-duty specifications are used for vehicle traffic and equipment support.
Selection should be based on a calculation using the actual load, support spacing and span, so that overloading does not cause local deformation.
Where necessary, the service conditions can be given to the manufacturer so that technical staff can help with the selection calculation.
Is FRP grating corrosion resistant?
FRP grating resists acids, alkalis, salts and many chemical media, and is a common material in highly corrosive locations such as chemical workshops and wastewater treatment plants.
Different resin systems cover different corrosion ranges: orthophthalic resin suits general corrosive environments, while vinyl ester resin performs better against strong acids and alkalis.
When selecting, state the name and concentration of the medium actually contacted so that the manufacturer can match the most suitable resin system.
Correct material selection together with reasonable maintenance keeps grating stable in corrosive service over the long term.
Can FRP grating be cut on site?
Yes. FRP grating can be cut on site with a resin cutting disc or a diamond saw blade, which makes fabrication quick and convenient.
Cut edges should be sealed with resin to prevent exposed fibres from affecting corrosion resistance and overall strength.
When drilling on site for installation, reinforce the edge of the hole appropriately so that local stress concentration does not cause cracking.
For large volumes it is better to have the manufacturer pre-fabricate the panels to drawings, which ensures cut quality and dimensional accuracy.
How long does FRP grating last?
Under normal use and reasonable maintenance, FRP grating can serve for more than ten years, far longer than ordinary steel grating in a corrosive environment.
Service life is affected by the environment, UV exposure and mechanical wear; highly corrosive or strongly sunlit locations accelerate surface ageing.
For long-term outdoor use, choose a resin containing UV stabilisers or add a surface protective layer to extend the service years.
Regular cleaning of the surface and prompt repair of local damage also help to maintain performance over time.
What are the advantages of FRP grating over steel grating?
FRP grating usually weighs about one third of steel grating of the same specification, which makes handling and installation easier and reduces the load requirements on the supporting structure.
Its corrosion resistance is far better than ordinary steel grating: it does not rust in acidic, alkaline or damp environments, and maintenance costs are lower.
FRP grating is also electrically insulating, which suits areas where electrical work is carried out.
Taking service life and maintenance cost together, FRP grating offers better overall value in corrosive environments.
