... Steel Grating (manufacturer) a.Cross bar: round or SQ.twisted b.Top: Plain or serated c.4000 square meter/week Heavy duty welded steel ... gratingFlooring galvanized steel grating is the most widely used.We have 7 ... ,25x4,30x3,30x4,30x5,32x5,40x5,50x5,.....75x10mm2Bear bar pitch12.5, 15, 20, 23.85, 25, 30, 30.16, 30.3 ...