HM440×300×11×18 HM440×300×11×18 Medium-flange H-section (GB/T 11263) I 121 440 300 18 11 13 15389 120.8072 547328849 2487858 2756602 188.5874 81055963 540373 823444 72.574 1345641 3608692547485 2.0357 Pending verification – nominal dimensions entered by the application developer GB/T 11263:2017 Hot-rolled H and cut T section steel 2017 2017 2026-10-12 UNVERIFIED Nominal dimensions require verification against the current edition of GB/T 11263:2017 Hot-rolled H and cut T section steel and the manufacturer catalogue before design use. Properties are calculated by this application from the nominal dimensions.