DIN 1025-4
DIN 1025-4 Hot rolled I-beams; wide flange I-beams heavy pattern, IPBv-serie; dimensions, masses, sectional properties
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/1994
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/1994