FRP grating is one of the most widely used composite products in industry, replacing steel and aluminium grating on walkways, platforms and flooring. This guide explains the types, how to choose, and where FRP grating excels.
Moulded vs pultruded grating
Moulded grating is manufactured as a single panel with a bi-directional mesh, giving balanced strength in both directions and excellent corrosion resistance — ideal for general walkways, platforms and trench covers. Pultruded grating uses high-strength pultruded bars for greater load capacity over longer spans, suiting heavier-duty applications.
Choosing the right load class and mesh
The correct grating depends on three things: the load it must carry (foot traffic, trolleys, vehicles), the span between supports, and the maximum allowable deflection. A smaller mesh and deeper bar carry more load over a longer span. Your supplier should provide a load/span table to match grating to your structure.
Anti-slip surfaces
Safety underfoot matters in wet, oily or icy areas. FRP grating is available with an integral gritted anti-slip surface that maintains grip far better than smooth metal, reducing slip incidents.
Where FRP grating outperforms steel
- Chemical and process plants where steel corrodes.
- Water and wastewater treatment works.
- Coastal, marine and offshore platforms.
- Areas needing non-conductive, non-sparking flooring.
- Sites where lightweight, easy-to-cut panels speed installation.
Installation and maintenance
FRP grating is light enough to handle without cranes, cuts on site with standard tools, and fixes down with corrosion-free clamps. Once installed, it needs no painting or rust treatment for decades.
SupraGrid, part of the SupraFRP family, supplies moulded and pultruded gratings in custom sizes, depths and colours — engineered for corrosion-free performance.