在介绍上述各面积指标前，有必要了解一下什么是住宅的结构面积。简单地说，住宅的结构面积是指住宅的所有承重墙（柱）和非承重墙所占面积的总和。即外墙、内墙、柱等结构件所占面积的总和。下面所要介绍的各类面积中，辅助面积、居住面积、使用面积是不含结构面积的。 （１） Before introducing the above-mentioned area indicators, it is necessary to understand what the residential structure area is. Simply put, the structural area of ​​a dwelling refers to the sum of the area occupied by all the load-bearing walls (columns) and non-load-bearing walls of a dwelling. That is, the total area occupied by structural parts such as exterior walls, interior walls, and columns. Among the various types of areas to be described below, the auxiliary area, living area, and use area do not include structural area. (1)