Molded vs Pultruded FRP Grating — Selection Guide
Two manufacturing routes, two best-fit applications. Choose by span, load direction and corrosion exposure.
Comparison
| Dimension | Molded grating | Pultruded grating |
|---|---|---|
| Manufacturing | One-piece molded, bidirectional roving | Assembled from pultruded bars + rods |
| Load direction | Two-way | One-way (bars carry load) |
| Typical spans/loads | Walkways, light-medium platforms | Longer spans, heavier point loads |
| Corrosion behavior | Resin-rich surface, excellent | Good; bar-joint area needs care |
| Weight vs steel | ~1/4 of steel grating | ~1/4 of steel grating |
| Cost for walkways | Economical | Higher for equivalent span |
| Best for | Chemical platforms, decks, trenches | Forklift lanes, long-span structures |
Industry-typical reference values, subject to our confirmed products and mill test reports. Do not treat as guaranteed specification.
Mechanical Ranges
| Property | Industry-typical range |
|---|---|
| Barcol hardness | 40–50 |
| Flexural strength (bars, longitudinal) | 200–400 MPa |
| Flexural modulus | 10–20 GPa |
| Open area (38×38 mesh) | ~70–75% |
Industry-typical reference values, subject to our confirmed products and mill test reports. Do not treat as guaranteed specification.
Standards We Reference
| Standard | Title / status |
|---|---|
| JC/T 1026-2007 | Load-bearing glass fiber reinforced thermosetting resin grating |
| GB/T 13096-2022 | General specification for FRP grating panels |
| BS 4592-4:2006 | Industrial flooring — GRP open-bar gratings specification |
| BS 4592-0:2006+A1:2012 | Common design requirements; slip resistance |
| ASTM F3059-18 | FRP gratings for marine construction and shipbuilding |
| ASTM E84 | Surface burning characteristics |
Standards are industry-common references; actual compliance stated on the mill test report. Certificates held:【TBD】.
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