Dear Mr.Richard Ay,

For a Hot-sustained Case,

As per Caesar-II recommendations the following are the load cases,

L1 = W+T+P - Operating
L2 = W+P - Sustained
L3 = L1-L2 - Expansion
L4 = T - Expansion
L5 = L1-L4 - Hot Sustained

My query - Is it necessary to check for the expansion stress (i.e.) L4=T also during the hot sustained or only the hot sustained stress is sufficient (i.e.) L5 = L1-L4?

Please clarify.....