... state-owned company) ZRHH STEEL GALVANIZED GRATING 1.Comprehensive type and broadest range in dimension. 1.1 Material Q235 , or other equivalent material ... Conformity Standard: YB/T4001, ANSI/NAAMM-MBG531, BS4592, AS1657, JS3101 1.3 Grating Dimension Load Bearing Flat Bar sizeThickness≥3mm, depth ... , 35.3, 40, 60, 80……Pitch of cross bars(mm)38.1, 50, 50.8, 70, 75, 80, 100, 101.6, 102 ...