Marine & Coastal
Why Marine & Coastal Needs FRP
Saltwater is the most unforgiving environment for conventional materials. Steel corrodes, timber rots, and concrete spalls. FRP grating — impervious to saltwater, UV-stabilized and lightweight — is the long-term answer for coastal and marine structures.- Saltwater corrosion of steel and rebar
- Timber rot and marine borer attack
- UV degradation of unprotected materials
- Weight limits on piers and floating structures
ZeAllgrate Solutions for Marine & Coastal
ZeAllgrate marine-grade grating, handrail and structural profiles are UV-stabilized, saltwater-immune and engineered for coastal service — with documented 20+ year performance in marine atmospheres.
Typical Applications
Marina decks & finger piers
Coastal walkways & boardwalks
Port access platforms
Boatyard work platforms
Seawall access systems
Floating dock walkways
Project Gallery
Real ZeAllgrate FRP grating products and installations in service across this industry.
FRP helideck access walkways on an offshore marine platform
FRP grating platform on a marine vessel process deck
Anti-slip FRP dock walkway in a saltwater splash zone
Solutions for Every Process Area
Engineered FRP solutions mapped to each stage of your facility — from corrosive process zones to high-traffic access routes.
Saltwater-immune decking for piers, jetties and marina walkways.
Non-slip gangways, stairs and companionways for vessels.
Covers and grating for coastal structures exposed to spray zone.
UV-stabilized boardwalks that resist salt and sun for decades.
Technical Specifications & Compliance
Application-specific engineering reference for Marine & Coastal — corrosion rating, load criteria, governing codes and the recommended ZeAllgrate configuration. Use this as the specification starting point; final design must be verified against certified load/span charts and the project's governing codes.
| Parameter | Specification for Marine & Coastal |
|---|---|
| Corrosion Level | High Continuous saltwater spray/immersion splash zone, UV degradation and freeze-thaw in temperate climates. |
| Typical Load Requirements | Marina decking & finger piers 60 psf (2.9 kN/m²) pedestrian; gangways & boarding platforms for crew + equipment; floating-dock decks additionally designed for buoyancy & wave uplift. |
| Applicable Standards & Regulations | USCG (33 CFR) for small passenger structures, IMO / SOLAS where vessel-adjacent, ABYC (marine products), ASTM D7029, NFPA 302 (marine motor craft fire), ADA accessibility for public boardwalks. |
| Recommended Resin System | ZeAll VE UV-stabilized for splash zone & immersion; ZeAll ISO UV-stabilized for atmospheric coastal exposure; gel-coat topcoat recommended for long-term UV color retention. |
| Recommended Grating Type | Molded 38.1/50.8 mm grit-top for piers & gangways; Pultruded I5020 for long-span boardwalks & finger piers; UV-stabilized color (gray/black) to minimize fade. |
Resin systems: ZeAll VE (vinyl ester — severe corrosion), ZeAll ISO (isophthalic polyester — general service), ZeAll FDA (food/potable grade), ZeAll FR (extra flame-retardant), Phenolic (fire/smoke-critical). Grating types: Molded (bi-directional), Pultruded (long-span), Mini-Mesh (fine openings), HLC (high-load capacity).
Typical System Configuration
A UV-stabilised, saltwater-rated FRP deck package for piers, finger piers and coastal walkways — molded grating, handrail, pultruded stair treads and all-A4 stainless fasteners. Built for splash-zone exposure and crowd loading. Confirm wave uplift, buoyancy and coastal building code on floating structures.
Component List
| Component | Product / Model | Material / Resin | Key Spec | Quantity / Ratio |
|---|---|---|---|---|
| Grating panels | ZeAllgrate Molded 38mm | ZeAll VE UV-stabilised, grit-top, gray | 38.1 mm thick, ~70% open, UV-stable gray | Main pier / deck surface |
| Handrail system | ZeAll VE tube handrail | ZeAll VE tubes, SS316 fittings | 42.4 mm posts, mid-rail, toeboard | Perimeter and open edges |
| Stair treads | Pultruded stair treads | ZeAll VE, grit-top | Grit nosing, wet-surface grip | Stair flights and gangways |
| Clips & fasteners | G-type clips + all fasteners | SS316 (A4-80) | Marine-grade, passivated | 2 clips per panel |
| Edge banding | FRP edge banding | ZeAll VE, UV-stabilised | 3 mm protective trim | Panel perimeter |
Design Parameters Summary
| Design Parameter | Value for Marine & Coastal |
|---|---|
| Load rating | Pedestrian 5.0 kN/m² (~105 psf) crowd/assembly |
| Span | 1.0 m panel span |
| Deflection limit | L/200 under design load |
| Resin selection rationale | ZeAll VE UV-stabilised for saltwater immersion and UV resistance |
| Surface type | Grit-top, wet coefficient of friction > 0.7 |
| Fastener material | SS316 (A4-80) marine-grade stainless |
Applicable Standards & Codes
- ISO 14122-1/-2/-3/-4 (permanent machinery access)
- ASTM E84 (surface burning characteristics, Class A)
- IMO FTP Code (Parts 2-5, where vessel-adjacent accommodation applies)
- USCG 33 CFR (small passenger / maritime structures, where applicable)
- Applicable coastal / waterfront building codes
Marine service demands three things at once: saltwater immunity, long-term UV colour retention and crowd-rated stiffness. A vinyl-ester UV-stabilised resin base with A4-80 stainless hardware prevents the pitting and crevice corrosion that plague marine fixtures, while the stricter L/200 deflection limit and 5.0 kN/m² crowd rating keep public piers and finger piers comfortable under dense, dynamic foot traffic. The grit top is specified for decks that spend half their life wet.
Marine Service Requirements
| Condition | ZeAllgrate Response |
|---|---|
| Seawater immersion & spray | No galvanic corrosion; vinyl ester in splash zones |
| UV exposure | UV-stabilised grades |
| Wet slip risk | Grit-top surfaces on decks and ramps |
| Boatyard / pier traffic | High strength-to-weight; SS316 hardware |
Specification Guidance
Marine decks are specified against salt, UV and wet traffic: vinyl ester for splash-zone panels, SS316 clips and fasteners throughout (never mixed alloys on one deck), grit-top where the surface stays wet. Boardwalks and piers use molded or pultruded grating on pultruded or FRP framing for a fully non-metallic structure. The case library documents marina decking and coastal walkway installations; request the load and UV data for the exact grade before specifying long exposed spans.
Marine decks are specified against salt, UV and wet traffic: vinyl ester for splash-zone panels, SS316 clips and fasteners throughout (never mixed alloys on one deck), grit-top where the surface stays wet. Boardwalks and piers use molded or pultruded grating on pultruded or FRP framing for a fully non-metallic structure. The case library documents marina decking and coastal walkway installations; request the load and UV data for the exact grade before specifying long exposed spans.Go Deeper with the ZeAllgrate Knowledge Base
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