Steel grating manufacturer Material:carbon/stainless steel Top:plain/serrated Finished:untreated,painted,hot dip galvanzied Heteng Steel ... tons .The bearing bar comes in the form of a plain surface flat bar, commonly used for platforms, trenchgratings, and ... 1000mm,1100mm6.Finished:untreated,painted or hot dip galvanized7.Top:plain or serrated8.Standard:ANSI/NAAMM(MBG531-88),BS4592-1987,AS1657 ...