Does the Steel Design to Eurocode 3 [EN 1993-1-1:2005] (EC3) support Tapered section design?
Yes, the design of tapered I sections (tapering in depth) is implemented in the STAAD.Pro for EN 1993-1-1:2005. Some additional design parameters should be used when a tapered sections are designed, i.e. EFT, HGT or LY. These design parameters are used for the lateral-torsional buckling checks as per Annex BB 3.2 of EN 1993-1-1 which are specific for the tapered sections.
A detailed explantion on the specific check of the tapered sections as per EN 1993-1-1:2005 can be found in the STAAD.Pro Help section Design > D. Design Codes > D5. European Codes > D5.C. European Codes - Steel Design to Eurocode 3 [EN 1993-1-1:2005] > D5.C.5 Member Design > D5.C.5.2 Members Subject to Bending Moments: