Charlot,

If you model your pressure thrust as a force in CAESAR II, you will have to add that load group (e.g., F1) to the load cases by hand. By default, CAESAR II does not consider these force sets as part of the sustained or expansion loads.

If you specify an effective ID for an expansion joint, CAESAR II will automatically include the calculated P*(effective area) on either end of the joint in load cases that include pressure.