DIN 1025-2
DIN 1025-2 Hot rolled I-beams - Part 2: Wide flange I-beams, IPB-serie; dimensions, masses, sectional properties
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 11/01/1995
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 11/01/1995