Steel rusts in salt air. Fiberglass grating does not. Here is how FRP Grating Master supplied vinyl ester walkway and platform grating for a South Korean ferry harbor, an Australian marina terminal, and a Norwegian offshore platform — three marine environments, one material decision.

Why FRP grating wins in marine environments

Marine and offshore decks face constant salt spray, splash zones, and wet footwear. Steel grating corrodes within years and requires repainting; aluminum is vulnerable to galvanic attack. FRP (fiberglass-reinforced plastic) grating is immune to saltwater corrosion, non-conductive, and roughly one-quarter the weight of steel — which matters when every kilogram lifted onto an offshore rig costs money. For these three projects, vinyl ester resin was specified because it outperforms polyester in continuous saltwater and splash-zone exposure.

Case 1: Vinyl ester walkway at a South Korean ferry harbor

A ferry terminal on the South Korean coast needed anti-slip walkway grating that would hold up to saltwater spray and high foot traffic from boarding passengers. FRP Grating Master supplied molded and pultruded FRP grating in vinyl ester with a grit-top anti-slip surface. The molded panels provided the walking surface; pultruded I-bar sections carried the structural spans. Vinyl ester resin was chosen over polyester specifically for its resistance to continuous saltwater immersion and the chloride-rich atmosphere of a working harbor. The grit-top surface delivers R13-class slip resistance even when the deck is wet from rain or spray.

Case 2: Salt-proof grating at an Australian marina terminal

An Australian marina and ferry terminal required decking and walkways that would not degrade in the spray zone. The specification called for marine-grade FRP grating with salt-water resistance. Vinyl ester molded panels were supplied in standard 1220 x 3660 mm sections, cut to fit the marina's existing support steel. The light weight of FRP meant the existing substructure — designed for steel grating loads — had reserve capacity after a full replacement. No welding, no hot work on the dock, and panels bolted down with SS316 grating clips.

Case 3: Cold-climate walkway on a Norwegian offshore platform

A Norwegian offshore operator needed non-slip walkway grating rated for low-temperature exposure in the North Sea. The challenge was not just saltwater — it was cold. FRP Grating Master supplied marine-grade FRP walkway grating formulated for low-temperature service, with a UV-stabilized resin system that resists embrittlement in sub-zero conditions. The pultruded profile design maintained specified load ratings at temperatures where steel becomes brittle and slip risk rises because decks stay wet and icy. Non-conductivity was an added benefit on an electrically complex platform.

Product types and resin systems used

Across these three marine projects, the product mix was consistent: molded grating 38 mm thick with 38 x 38 mm mesh for general walkways, pultruded I-bar grating for longer spans and heavier loads, and vinyl ester resin grade throughout. Grit-top surfaces for high-traffic boarding areas; concave surfaces for exterior decks where water must drain. SS316 clips for fastening. For your own marine or offshore project, confirm the exposure zone (splash, immersion, atmospheric) and the deck load requirement — FRP Grating Master supplies load tables and third-party test data for every grade.

How to start your FRP grating project

Send us your site drawings or a simple description of the environment: exposure zone, required load, span between supports, and the chemicals or climate conditions. Our engineering team will recommend the resin grade, panel thickness and surface type, and send a quotation within 24 working hours. Free samples are available for evaluation. Because FRP Grating Master is a direct factory — not a trader — you get factory-direct pricing, full CAD engineering support, and quality control at every production stage from raw resin to finished panel.

Standard specifications and supply

FRP Grating Master supplies standard molded panels in 1220 x 3660 mm and 1220 x 2440 mm sizes, in 25, 30, 38 and 50 mm thicknesses. Standard mesh is 38 x 38 mm; mini-mesh 19 x 19 mm is available where small debris must not pass. Pultruded I-bar profiles come in 25 to 100 mm depths. All panels are manufactured under ISO 9001 quality management and exported to 40+ countries. Typical lead time is 15 to 25 days after drawing approval, with 15-25 day production and global shipping. Cut-to-size fabrication, CAD engineering and third-party test reports are available on request.

Key takeaways

Vinyl ester is the default resin for continuous saltwater exposure; molded grating suits walkways while pultruded grating carries heavier spans. Grit-top surfaces handle passenger and foot traffic; concave surfaces drain standing water. The same corrosion-resistant, non-conductive, lightweight material works from a temperate marina to a North Sea rig. Read more about FRP grating for offshore and marine applications or our vinyl ester chemical resistance guide.