... 100mm 3>Plain,Serrated,I-shape 4>Hot-dipped galvanized,Painted,Untreat Specifications1>Bearing bar pitch:30,40,60mm 2> ... ,Serrated,I-shape 4>Hot-dipped galvanized,Painted,UntreatedWe have wide range of Steel Grating in Plain/Serrated Type, Widely Applied ... manufacture special pitch according to clients material carbon steel,aluminum,stainless steel anti-crossive property anti-acid and alkali corrsion ...