the area of the structure (if any) should not be included in the construction area.

1. Excerpt from Terminology Standard for Civil Building Design (GB51514---2119):

2.1.4 The space and entity constructed by building materials are places for people to live and carry out various activities.

2.1.5 an engineering entity or affiliated building facility built for the purpose of use, in which people generally do not directly carry out production and living activities.

2. Excerpt from Standard for Basic Terminology of Engineering Structure Design GB/T51183-2114:

2.1.1 All achievements of human construction activities in buildings. Such as buildings, bridges, docks and dams. Buildings other than houses are sometimes called structures.

iii. Extract from Code for Calculation of Building Area of Building Engineering (GB51353---2113):

2.1.1 Floor area formed by buildings (including walls).

Interpretation of the clause: The construction area includes the areas of outdoor balcony, awning, eaves gallery, outdoor

corridor and outdoor stairs attached to the building.

2.1.5 the building space is defined by the building interface, which is a place for people's life and activities.

interpretation of the provisions: enclosed spaces with conditions that can be used by people (the use purpose may be indicated in the design, but it may not be indicated or the use purpose is unclear) belong to the building space.

3.1.27 The construction area should not be calculated for the following items:

1 Building components that are not connected with the building;

2. Open public space and building access on the ground floor of arcade and street building;

3. Overbridges and platforms with curtains and scenery hanging on the stage and backstage;

4 terraces, outdoor swimming pools, flower stands, roof water tanks and decorative structural members;

5 platforms for operating platforms, feeding platforms, installation boxes and tanks in buildings;

6. Legs, wall posts, cribs, steps, wall plastering, decorative surfaces, surface layers with pasted blocks, decorative curtain walls, shelves (boxes), components and accessories of outdoor air conditioners outside the main structure, and the columnless awnings with a width of less than 2.11m and the columnless awnings with a top cover height of two floors or more are selected;

7 convex (floating) windows with the height difference between the window sill and the indoor floor below 1.45m and the structural clear height below 2.11m, and convex (floating) windows with the height difference between the window sill and the indoor floor above 1.45m;

8 outdoor ladders and outdoor dedicated fire-fighting steel stairs;

9 sightseeing elevator without enclosure structure;

11 underground civil air defense passages outside buildings, independent structures such as chimneys, flues, trenches, oil (water) tanks, gas holders, water towers, oil (water) storage pools, warehouses, bridges, etc.