DIN 1025-3
DIN 1025-3 Hot rolled I-beams; wide flange I-beams, light pattern, IPBl-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