5B=直径为25MM二级钢,G4B16=构造腰筋4根16MM二级钢LL(1)为梁构件代号40*80=梁的截面A12@15/20(4)=箍筋为一级12MM 间距为15和20交替4B25,4B25=面底筋均为:4根25MM二级钢G6B16=同上4B25,4B25+2B22 4/2 这点看好了4B25=面筋为:4根25MM二级钢;4B25+2B22 4/2=底筋4根25MM二级钢+二排通长筋2根25MM二级钢