The Coast Guard’s Office of Design and Engineering Standards published Policy Letter 01-18: “Equivalency Determination-FRP Gratings Conforming to ASTM F3059,” that provides guidance on the acceptance of Fiber Reinforced Plastic gratings as equivalent to steel on inspected vessels, including mobile offshore drilling units and floating production platforms.
Source: USCG
Link: 5/11/2018: New policy letter available regarding Equivalency Determination – FRP gratings conforming to ASTM F3059