... -dipped Galvanized Use:platform,ladders,floor drain,floor drain ISO9001 Serrated Steel Welded Grating Material:steel grating is made of low ... dip galvanized, painted, spray coating 6Grating StylePlain / Smooth, Serrated /teeth, I bar, serrated I bar 7StandardUSA: ANSI/NAAMM(MBG531-88),UK: BS4592 ...