... .steel grating Materials:Q235, Q255,Q305,Q355,Q405, etc.2. steel grating Standard Sizes:Our grating is manufactured to the following sizes ... (hot sale)/30x3 galvanized steel grating/serrated bearing bar grating3. Standard Description: NoItemDescription1Bearing bar25x3,25x4,30x3,30x4,30x5,32x5,40x5,50x5 ... .16, 30.3, 34.3, 35, 40,41,60mm. US standard: 1"x3/16", 1 1/4"x3/16", 1 1 ...