... platforms, walkways, trench trestle bridge cover, covers, ladders, fence, fence, etc. Specification of steel grid mesh seriesSeries distanceTraverse line distanceLoad flat specifications (wide ... standardYB/T4001, ANSI/NAAMM-MBG531, BS4592, AS1657, JS3101Grating Steel Material:Low Carbon Steel, Mild Steel, Grating Size:3'x20', 3'x24', 3'x30', 1000x1000 ...