“双变”式住宅,是对单元平面进行修改的灵活设计,目的在改变户型和方厅的大小,以适应各种户室比的需要,满足居住功能上的要求,为住户创造良好的居住条件。由于各地对户室比的调查分析或统计,都还只是一个近似数,同时住宅设计要受规划、地形、居住标准等约束,因此设计的户 “Double variant” type residence is a flexible design for modification of the unit plane. The purpose is to change the size of the unit type and the party hall to meet the needs of various household ratios, meet the requirements of the living function, and create a good living for the residents. condition. Due to the survey analysis or statistics of the ratio of households to households, it is still only an approximate number. At the same time, residential design is subject to constraints of planning, topography, and residence standards.