JIPlKIC 箱构设计原黑 $9.1.3 The characteristics of normal use (compared with the ultimate limit state) Calculated according to different:Ultimate limit state is the failure stage(II a)of the state schema for the establishment of the basis of calculation;and use phase generally refers to the first stage II, thebeam with a crack session. §9.1.3 The characteristics of normal use (compared with the ultimate limit state) ⚫ Calculated according to different: Ultimate limit state is the failure stage (Ⅲ a) of the state schema for the establishment of the basis of calculation; and use phase generally refers to the first stage Ⅱ, thebeam with a crack session