... or welding, with nosing or not stair tread , steel stair tread , metal stair tread with fixing by steel bolts or welding, ... Galvanizingand stainless grating flooring walkway, platform and steel structures, stair tread, well cover, trench cover, compound gratings, storage shelves, ladder ... -1987 D) Australia: AS1657-1985 E) Japan: JJS. stair tread , steel stair tread , metal stair tread stair tread