Material and product decision guide
FRP vs Galvanized Steel Grating
FRP and galvanized steel solve corrosion in different ways and have different structural, fire, electrical, fabrication and inspection considerations.
Compare an exact FRP resin and construction with an exact steel section and coating—not generic material labels—and include every governing project requirement.
Side-by-side decision matrix
This matrix is a screening aid. It identifies what must be compared; it is not a substitute for the approved design or product data.
| Decision | FRP grating | Galvanized steel grating |
|---|---|---|
| System | Fiber reinforcement, resin, construction and surface work together. | Steel panel plus a specified zinc coating. |
| Load path | Molded and pultruded products can differ. | Bearing bars span between supports. |
| Exposure | Chemical compatibility needs product-specific evidence. | Coating suitability depends on atmosphere, wetting and damage. |
| Electrical | Nonmetallic behavior may be a project driver; verify the assembly. | Conductive metal; bonding and electrical requirements are project matters. |
| Fire | Resin, smoke and flame requirements must be stated and evidenced. | Steel and coating behavior must be checked within the complete design. |
Choose FRP grating when
- The exact resin system is compatible with the documented chemicals.
- Electrical or handling requirements favor a nonmetallic panel.
- Load, fire, surface and installation evidence all match.
All conditions still need confirmation against the exact panel, support, load case and governing specification.
Choose Galvanized steel grating when
- The steel section and zinc coating suit the load and exposure.
- Metal fabrication and connection practices fit the project.
- Coating inspection and repair can be maintained.
Ask the supplier to identify any qualification, exception or missing evidence before treating the option as equivalent.
Inputs required for a defensible comparison
A quotation cannot resolve the choice unless both suppliers receive the same technical basis. Include the following in the RFQ and record assumptions explicitly.
- Exact FRP resin/construction or steel/coating
- Chemical and temperature exposure
- Load, support, span and deflection
- Fire, smoke and electrical requirements
- Cuts, clips, coating repair and maintenance
Related product information: FRP grating · Galvanized steel grating. For preliminary sizing, use the load and deflection guide.
What this guide does not decide
It does not approve structural capacity, slip resistance, fire performance, chemical compatibility, electrical suitability, accessibility or legal compliance. Those decisions depend on the installed system, jurisdiction, test method and order-specific evidence reviewed by the responsible project team.
Primary references
Checked 2026-09-04. Confirm the edition and scope accepted by your project.