... 200,300,400 series Stair Walkway Checkered plates 1. Grade: SS 304, 321, 304L, 316L; aluminum 1060, 1070, 3003, 50522. ... . Standard: AISI, ASTM5. Packing: standard export packing.Checkered plates Features:Checkered plate is light, durable, making projects easier to cut and ... used in place of traditional, heavy-gauge tread plate. Application of Checkered plates :Footplate of the carElevators, light rail, ...