... clip , galvanized steel grating fixing clips ,Type A, B, C of grating clips---composed of a top board with ... 6) Steel grating standards: A) China: YB/T4001-1998 B) USA: ANSI/NAAMM (MBG531-88) C) UK: BS4592 ... 15-w-4, 11-w-4, 19-w-2, 15-w-2 etc. (Mr. David Huang) 3Twisted Cross Bar Pitch38.1, ... 50, 60, 76, 80, 100, 101.6, 120mm, 2'' & 4'' etc (Mr. David Huang) 4Material GradeASTM A36, A1011, A569, Q235, ...