... :6mm 3.Casting way:pressure welded 4.Steel grating machines:4 Specification1).Steel grating bearing bar:35x5,32x5,32x4.5, ... treatment:By electro-galvanized coated,hot-dipped galvanized coated,stainless steel,untreated5).Raw material:Iron or stainless steel6).Material model: ... ).Our daily supply ability:500 to 1000 square metersUsage12).Used as platform,trench cover,building,transportations and so on. ...