Standard covers are available in 1/4″ thickness and above rated at 300 Lbs pedestrian load rated. The steel covers in a 10GA material will not be rated. Steel covers are of a smooth surface available in a non-corrosive enamel finish, powder coating, epoxy coating, or galvanized finish. The fiberglass covers and the aluminum covers are complete with a diamond plate finish. The fiberglass covers have a UV inhibitor to protect against fading or chaulking. All covers provided by AK Industries carry a one-year warranty against defects in material and/or workmanship.