Welded Bar Grating It's extension product are mainly stair tread,trench cover,flooring,dock,suspended ceiling and catwalk ,etc. Bar Grating Certification:ISO9001:2000 1.Bearing bar pitches may be 15to22,25,30,32.5,34,40,50,60,80,90mm,of which 25,30,34,and 40mm are recommended.2.Cross bar pitches may be 24-200mm,of which 50mm,76mm and100mm are recommended.3.Surface-treatment:Galvanized ,black4. ...