Glass-fiber reinforced plastic (GFRP) deck plates are a structure that covers the top surface of a grate with a glass-fiber reinforced plastic plate, creating a design where the lower layer is a grate and the upper layer is a flat plate. Hence, it is called a grate deck plate. Compared to standard glass-fiber reinforced plastic grating panels, grate deck plates offer greater functionality than regular grating panels. They have superior load-bearing capacity, making them widely used in various applications.