... sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3, 25X4, 25X4.5, 25X4.7, 25X5…..40X6, 40X8, 40X10,….90X6….Pitch of Load ... bearding flat bars(mm)12.5,15, 20, 30, 30.6, 32.5, 34, 34.8, 35.3, 40, 60, 80…… ... Pitch of cross bars(mm)38.1, 50, 50.8, 70, 75 ... I type; cross bar: round type and square twisted type. www.cnstrongstar.com Anping Steel Grating(China)