... bar size:I (25-44)×5×3 ,(50-75)×7×4 FB19×4.5,(25-44 ... )×(3-4.5),(50-90)×62.Section type:3.pitch of ... bearing bar:12.5, 15,25, 30, 30.16, 32.5, 34, 40, 41.25, 45, 50 ... , 100 4.pitch of cross bar:38, 50, 76, 100,150,200,300OUR GALVANIZED STEEL GRATING ... 25×5×332×5×338×5×350×7×455×7×465×7×43050/100GI2553/30GI3253/30GI3853/30GI5074/30GI5574/30GI6574/ ...