Knowing the standard FRP grating panel sizes helps you plan support spacing, estimate weight and compare quotations. This guide lists standard thicknesses, mesh openings, panel dimensions and tolerances for molded and pultruded fiberglass grating.

Standard panel thicknesses

Molded FRP grating is manufactured in standard thicknesses of 25mm, 30mm, 38mm and 50mm. The 25mm and 30mm panels suit pedestrian walkways and platforms; 38mm is the common all-round industrial choice; 50mm is specified for heavy-duty and vehicle areas. Pultruded grating is made in deeper sections (typically 25–100mm I-bar depths) for higher load capacity over longer spans.

Mesh openings

Mesh opening is the clear distance between bearing bars. Common molded openings range from 19×19mm up to 40×40mm. A tighter 19×19mm or 25×25mm mesh is used where small objects, heels or tools must not pass through; 38×38mm and 40×40mm maximise open area, drainage and light. Choose the opening that balances safety and open area for your application.

Standard panel dimensions

Molded FRP grating panels are commonly supplied in dimensions such as 1220×3660mm (4ft×12ft) and 1000×3000mm or 1000×4000mm in metric markets. Pultruded grating is often supplied as 1220×3660mm panels or as loose bearing bars with separately supplied cross bars. Exact stock sizes vary by line, so confirm the standard panel dimension with ZeAllgrate for your market.

Tolerances and cut-to-size

Composite grating is manufactured to practical tolerances on length, width and thickness (commonly ±1.5% or ±3mm, whichever is greater, on length). Panels are easily cut to size with a circular saw or abrasive wheel, and ZeAllgrate can supply pre-cut panels to your exact drawing, including cut-outs around columns and pipe penetrations.

Weight and planning

Panel weight depends on thickness, mesh and resin — roughly 25mm panels weigh around 14–20kg/m² and 50mm panels around 28–38kg/m². Factor in weight for transport, lifting and support design. Use the standard sizes to space support beams at or below the rated span and to estimate total material for your FRP grating project.