a) China: YB/T4001-1998 b) USA: ANSI/NAAMM (MBG531-88) c) UK: BS4592-1987 d) Australia: AS1657-1985 1) Type of bearing bar: induction in the each product show.2) Pitch of bearing bar: induction in the each product show.3) Pitch of cross bar: induction in the each product show.4) Material: mild steel or stainless steel.5) Finish: hot dip galvanizing or painted or untreated.6) Steel grating standards:     a) China: YB/T4001-1998    b) USA: ANSI/NAAMM (MBG531-88)    c) UK: BS4592-1987    d) Australia: AS1657-1985