... safe, 2 easy installation,sturdy and durable, ventilated Steel Grating /Steel grid 1) Light weight, great load-bearing capacity, ... factory, transportation, municipal, administration, parking lot etc.3) steel grating may be applied to platform, floor, walkway, stair ... 15,20,25,30,35,40,50mmCross bar pitch38,50,80,100mmmaterialLow carbon steel, stainless steel, aluminumSurface treatmentUntreated, hot ...