... ,Type:Plain,Serrated,"I",Press-Locked 2,FB405/30/100, 3,Surface:Untreatment,Galvanized,Painted...... 1.Steel Grating 1).Bearing bar pitches ... ,50,76mm and 100mm are recommended. 3).Type: Plain, Serrated ,"I", Press-locked. 4).Materia specification: ASTM A36, BS4360, JIS G3101 ...