Substructure provides all load groups as defined in IRC specifications Table 3.22.1A . You can use these load groups directly, or create your own load groups (e.g., you may need to create seismic load groups).

Each load in the load group is given as either unidirectional or reversible. A reversible load is where both positive and negative values are considered in the load combinations. A unidirectional load only considers its positive value in the load combination. In IRC, only W, WL, LF, and EQ are reversible loads. The rest of the loads are unidirectional. Note that self-weight (SW) of structure is always associated with dead loads (G). If you do not select a dead load, the self-weight will not be considered in the results of load combinations and envelopes.