... by the customers,is made of load flat steel bar and cross rods,placed ,horizontally and vertically, ... bar25x3,25x4,30x3,30x4,30x5,32x5,40x5,50x5,.....75x10mm2Bear bar pitch12.5, 15, 20, 23.85, 25, ... 1 1/2"x 1/4" etc.3Cross bar pitch38,50,76,100,101.6mm4MaterialQ235,A36,SS3045Surface ... NAAMM(MBG531-88)UK: BS4592-1987Australia: AS1657-1985 Steel gratings are ususllly used in: Chemical plant;Power plant; ...