FRP Pultruded Grating — High-Stiffness Span Panel

Fibers all pulling in one direction. Unlike molded grating with its bidirectional mat, pultruded bearing bars pack continuous glass rovings along the load path. The result is a modulus comparable to steel at a quarter of the weight. On clear spans beyond 1.2 metres, the deflection difference is generally noticeable underfoot.

Smooth, pedestrian‑friendly surface. The standard top finish is a bonded grit layer, but the underlying bar profile is flat and even. Maintenance crews walking these walkways commonly notice the difference—no raised nodes to trip on, no ponding of chemical rinse water.

Fewer support beams, lighter substructure. Because the panel itself carries load over longer distances, the supporting steel framework can be spaced further apart. On a large project—a wastewater treatment plant with 300 linear metres of walkway—the steel savings can be significant.

Corrosion resistance without the weight penalty. Standard polyester resin handles most industrial atmospheres; vinyl ester steps up for chlorine dioxide, sodium hypochlorite, and mixed acid fumes. Through it all, the panel weight stays roughly one‑third of an equivalent steel grating. Corrosion resistance is commonly verified under ASTM D543.

Common installations include long straight walkways in water and wastewater plants, cable tray covers in petrochemical facilities, tunnel service gangways, and offshore platform access ways. All share the same requirement: span distance without sag, in a material that generally ignores moisture and salt.

Bearing bar depth typically ranges from 25 mm to 75 mm, with deeper bars for longer spans or higher loads. Panel width is commonly up to 1.5 m, with custom widths available on request. Span capability is typically up to 2.4 m clear span, depending on bar depth and load configuration. Weight ranges from approximately 15–35 kg/m², about one‑third of equivalent steel grating. Resin options include isophthalic polyester as standard, with vinyl ester available for aggressive chemical or chlorine environments. Maximum continuous service temperature is typically 80°C for polyester and 100°C for vinyl ester, with short‑term excursions acceptable. Surface finish is bonded grit top as standard for slip resistance.

Pultruded grating is part of the WayTong FRP Grating range, which also includes standard molded, mini‑mesh, covered, and heavy‑duty grating options. For complete mechanical and corrosion performance data, see the ASTM Standards Summary.