... bar:6mm 3.Casting way:pressure welded 4.Steel grating machines:4 Specification1).Steel grating bearing bar:35x5,32x5,32x4.5 ... /T deposit,and also L/C is acceptable10).Our grating machines number:30,about 4 big machines11).Our daily supply ability ... :500 to 1000 square metersUsage12).Used as platform,trench cover,building,transportations ...