... production capability 3. Best Price 4. Reliable manufacturer 1. Comprehensive type and broadest range in dimension.1.1 Material Q235 , or ... sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3, 25X4, 25X4.5, 25X4.7, 25X5…..40X6, 40X8, 40X10,….90X6….Pitch of Load ... limited to above.1.4 Grating type: Serrated I type,with square twisted cross bar.1.5 Finishing treatment: a. Galvanized, b. Untreated ...