... 3. Easy installation & saving work time. Advantages of steel grid plank: light weight, strong intensity, big load capacity, ... of which 50 and 100mm arerecommended3) Advantages of steel grid planks: light weight, strong intensity, big load capacity, ... & Low carbon steel, etc5Surface TreatmentBlack, self colour, hot dip galvanized, painted, spray coating 6Grating StylePlain / Smooth, Serrated /teeth, ...