Specifications1.steel grating for bridge decks 2.ISO9001:2000 3.Good drain of water ... quality 4.Hot dipped galvanized 5.High intensitysteel grating for bridge decks ,Website:http://www.jsbaileybridge.com, Heavy Duty trench ... is applied on walkway, carriageway, courtyard etc; used as cover for drainage trench, wire ditch, subway, and air pit, hot-dip ...