... to save in materials under same loading conditions and accordingly in materials of structural rack as well. ... Less labor cost, short time limit, non cleaning and maintance. 3)Convenient operation: One person just is ok ... fix rack. 4)Short time limit: Non reprocessing and being assembled quickly 5)Morden style: Nice shape, ... ,76,80,100,101.6,120mm 4 Grating Style smooth, teeth, I bar, serrated I bar ...