Is it possible to specify the heave + roll and heave – roll in the same load case?You cannot create heave + roll and heave – roll in the same load group. You need to create two different groups with the directional factor as + 1 for heave + roll case and -1 for heave – roll case.In the STAAD file however, you can manually edit the load cases two specify all the load items in the same load case – however, doing that you run the risk of under estimating the inertial forces.