... ,25x5mm. 2. cross bar : 6mm, 8mm. 3.Plain,Serrated,I-shape Series 1 (pitch 30mm) steel grating is the most common type ... the strongest impact on the surface resistance in the whole series.It is widely used in power plants, refineries, sewage ... ball mill, processing plant and operating stations.Steel Grating Specifications Series Article vertical spacing Bar spacing Load flat steel specification (width ...