FRP Grating vs Galvanized Steel Grating

The most common real-world choice: corrosion-proof fibreglass versus zinc-coated steel. Environment, load and lifetime cost decide.

Factor	FRP Grating	Galvanized Steel Grating
Corrosion	Total — inert to acids, alkalis, chlorides	Zinc barrier; wears in harsh/coastal service
Load capacity	Good; high with pultruded	Highest for the depth
Weight	~1/4 of steel	Heavy
Conductivity	Non-conductive, non-sparking	Conductive
Upfront cost	Higher	Lower
Lifetime cost (corrosive)	Lower — no re-coating, 25+ yr	Rises with re-coating/replacement
Best use	Chemical, water, marine, electrical	Heavy/dry industrial, structural

The verdict

Choose FRP for chemical, water, marine and electrical areas where corrosion or safety rule out steel. Choose galvanized steel for the heaviest loads and lowest upfront cost in dry or moderate environments.

FAQ

Is FRP or galvanised steel cheaper overall?

Galvanised steel is cheaper upfront; FRP is cheaper over its life in corrosive service because it never needs re-coating and lasts 25+ years.

When must I use FRP instead of galvanised steel?

Where the zinc coating would be quickly consumed — strong chemicals, constant salt water — or where non-conductivity is a safety requirement.

Full FRP vs steel · FRP grating · All comparisons

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