... bar:6mm 3.Casting way:pressure welded 4.Steel grating machines:4 Specification1).Steel grating bearing bar:35x5,32x5,32x4.5,32x3 ... ,30x5,30x3,25x5,25x3,etc.2).Steel grating cross bar diameter:6mm,8mm3).Type for casting: ... locked4).Grating surface treatment:By electro-galvanized coated,hot-dipped galvanized coated,stainless steel,untreated5).Raw material:Iron or stainless steel6).Material ...