... StandardSteel grating standards: CHINA: YB/4001-1998, U.S.A:ANSI/NANMM (MBG531-88),U.K: BS4592-1987.Steel product standard: CHINA: ... GB700-88, U.S.A: ASTM(A36), U.K:BS4360(43A).Hot galvanized standard: CHINA: GB/ ... T13912, U.S.A:ASTM(A123), U.K:BS729Applicationplatform, floor, walkway, fence, They widely used ...