Michael,

Thanks for your reply . I moved the Exj to horizontal and added two spring hanger . I used tied Exj so I modeled simple model expansion joint. Loads on pump are within the limit.
However I have one question: As per CAESAR II application guide , I put transverse stiffness calculated from KTR = (3/2) (KAX) (Deff/L)2 for Tied bellows Expansion Joint-Simple Model . This value is much different from what I see as Lateral Stiffness in a vendor catalog. Since the simple model is based on Finite length Expansion joint model and not zero length expansion joint model , Should I put the value from above formula or the one that vendor gave in its catalog as trans stiffness ?