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