Electric hot-dipped galvanized steel grating bearing bar:19*3 ... galvanized steel grating1.Comprehensive type and broadest range in dimension.1.1 Material Q235 , or other equivalent material1.2 Grating ... ANSI/NAAMM-MBG531, BS4592, AS1657, JS31011.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ... twisted type. 1.5 Finishing treatment: a. Galvanized, b. Untreated (black self-color), c. ...