"A wise man does not need advice and a fool won't take it."
Fiberglass grating is available in different grades and thickness's.
Fiberglass grating is used in many harsh environments. It replaces the traditional steel and galvanized grating which doesn't last. In some case the traditional steel grating corroded with-in a very short time. Now with fiberglass grating (FRP) the corroding concerns are gone.
FRP grating is also very light weight compared to steel or galvanized grating. It also much easier to cut using just standard tools.