In the current input file structure in SACS there is an option to set the buckling length of the bottom flange of wide flange beams separately in the GRUP card. This means that for every physical member separate GRUP cards need to be created to set the correct bottom flange Lb. It would be significantly less time consuming if the Lb of both top and bottom flange could be set on the MEMBER card. This is important for Eurocode checks.