Load Cases and Load Combinations

Each of the nodal loads, point loads, line loads, surface loads, and self weights must be assigned to a load case.  The enforced displacements of supports are special loads and are considered in each load combination.  The load cases are used as bases for the load combinations and are not solved directly.  If you desire to solve for a particular load case, you may form a load combination with a unit load factor for that load case and 0s for all other load cases.  

P-Delta analyses may be performed on one or more load combinations.