... capability 3. Best Price 4. Reliable manufacturer 1. Comprehensive type and broadest range in dimension.1.1 Material Q235 , ... 34.8, 35.3, 40, 60, 80……Pitch of cross bars(mm)38.1, 50, 50.8, 70, 75, ... .4 Grating type: Bearing bar: Plain type, Plain I type, Serrated type, Serrated I type; Cross bar: Round cross bar, Square twisted cross bar.1. ... according to site requirement. Steel Grating_Serrated I type