... 1''x3/16'', 1 1/4''x3/16'', 1 1/2''x3/16'', 1''x1/4'', 1 1/4''x1/4'', 1 1/2''x1/4'', 1''x1/8'', 1 1 ... /4''x1/8'', 1 1 ... 15-w-2 etc. 3Twisted Cross Bar Pitch38.1, 40,50, 60, 76, 80, 100 ... & Low carbon steel, etc5Surface TreatmentBlack, self colour, hot dip galvanized, painted, spray coating 6Grating StylePlain / Smooth, ...