... surfaceI-the section is of ‘I’ type 2. Description:Bearing bar centers at 20mm: This kind of fine ... single-side full welding every 5 bearing bars. Bearing bar centers at 40mm: light grating and very economical. ... bar25x3,25x4,30x3,30x4,30x5,32x5,40x5,50x5,.....75x10mm2Bear bar pitch12.5, 15, 20, 23.85, 25, ... "x 1/4", 1 1/2"x 1/4" etc.3Cross bar pitch38,50,76,100,101.6mm4MaterialQ235 ...