Dears,

Is it neccessary to check the system in Occassional stresses while checking system for lift-off case?
As per my understanding,during lift off case we remove support(which are lifting in operating & Ope+Occ.) and check the system in sustained case.
As sustained case allowables are compared with Hot-stresses,if the stresses in Sustained case is within the allowables then in Occassional case where we are having 1.33times the Basic alllowables stress gives us the liniency not to check stresses in Occassional case during lift-off check.
Is my understanding right?,please suggest me.