... bar is 20 x 3 to 100 x 10;the specification of I-section type is 25 ... center:12.5, 15,25, 30, 30.16, 32.5, 34, 40, 41.25, 45, 50, 60, 60.32, 80 ... , also be according to client's requirement and 50, 100mm are recommended, America standard is available.4 ... ×525×5130100G203/30/100G253/30/100G323/30/100G403/30/100G205/30/100G255/30/10050G203/30/50G253/30/50G323/30/50G403/30/50G205/30/50G255/30/50240100G203/40/ ...