... or serated c.4000 square meter/week Heavy duty welded steel gratingFlooring galvanized steel grating is the ... year lead to 50,000 tons .The bearing bar comes in the form of a plain surface ... made of flat steel and bars by welding with certain distances. It goes through cutting, opening, ... 1/4" etc.3Cross bar pitch38,50,76,100,101.6mm4MaterialQ235,A36,SS3045Surface treatmentBlack, hot dipped galvanising ...