Is FRP grating more expensive than steel?
Quick answer
FRP usually costs more upfront, but in corrosive service its lifetime cost is lower because it needs no re-coating and lasts 25+ years without corroding. In dry structural use, galvanized steel is the more economical choice.
The higher purchase price of FRP is often recovered through lower installation cost (it is light enough to handle without cranes) and near-zero maintenance — no grinding, re-galvanizing or replacement in aggressive environments.
A simple lifetime-cost comparison usually favours FRP in chemical, coastal and water-treatment plants, and favours galvanized steel for dry, heavy, indoor or low-corrosion structural work.
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