... welding load flat steel and bars with certain distances.It goes through cutting ,opening ,edging and other processes.The processes. ... safe , skid-proof, easily fixed and dismantled, economical ,long life and durable, ventilated and penetration of light, easily to be ... grating untreated: Allowing quicker delivery to customers whom fabricate and galvanize the grating on their own.Galvanized: Hot ...