... spacing and cross bar (twisted square steel, square steel, round steel, flat steel, etc.) to cross arranged, and welded into the ... is mainly used to do the ditch cover plate, steel flat pallet, steel ladder step plate, etc. Through the ... explosion-proof performance, etc.galvanized steel gratingApplication Specification Load Bearing Flat Bar sizeThickness≥3mm, depth ≥19mm19X3,19X5,20X3, 20X5, 25X3, ...