Summary of the “Code for Calculating Building Area”!

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Summary of the “Code for Calculating Building Area”! There is a great deal of information related to the calculation of building area as specified in the Standard GB/T50353-2013, and it can be easy to get confused. Below, relevant data on the calculation of building area is summarized for your reference! I. Calculate at full area
1. The building’s floor area, with a structural floor height of 2.20m or more.
2. Partial floors (with enclosures counted as such, without enclosures counted based on the floor slab), with a structural floor height of 2.20m or more.
3. Elevated areas of buildings or areas on sloped land with elevated foundations, with a structural floor height of 2.20m or more.
4. Corridors located in lobbies or halls, with a structural floor height of 2.20m or more.
5. Basements and semi-basements, with a structural floor height of 2.20m or more.
6. Doorways with enclosures, with a structural floor height of 2.20m or more.
7. Stairwells, water tank rooms, and elevator shafts on the top of buildings that have enclosures, with a structural floor height of 2.20m or more.
8. Floors within buildings that serve as equipment levels, pipe layers, or shelter levels, with a structural floor height of 2.20m or more.
9. Sloping roofs that form part of the building’s structure, with a clear structural height greater than 2.1m.
10. Building spaces under stadium stands, with a clear structural height greater than 2.1m.
11. Floors where the enclosure structure is not perpendicular to the horizontal plane, with a clear structural height of 2.10m or more.
12. Light wells with roofs should be calculated as one floor, with a clear structural height of 2.10m or more.
13. Stage lighting control rooms with enclosures, with a structural floor height of 2.20m or more.
14. Floor-to-ceiling display windows attached to the exterior walls of buildings, with a structural floor height of 2.20m or more.
15. Balconies located within the main structural framework of a building.
16. Elevated corridors between buildings, with roofs and enclosures.

II. Calculate at half area
1. The building’s floor area, with a structural floor height of less than 2.20m.
2. Partial floors, with a structural floor height of less than 2.20m.
3. Elevated areas of buildings or areas on sloped land with elevated foundations, with a structural floor height of less than 2.20m.
4. Corridors located in lobbies or halls, with a structural floor height of less than 2.20m.
5. Basements and semi-basements, with a structural floor height of less than 2.20m.
6. Doorways with enclosures, with a structural floor height of less than 2.20m.
7. Stairwells, water tank rooms, and elevator shafts on the top of buildings that have enclosures, with a structural floor height of less than 2.20m.
8. Floors within buildings that serve as equipment levels, pipe layers, or shelter levels, with a structural floor height of less than 2.20m.
9. Stage lighting control rooms with enclosures, with a structural floor height of less than 2.20m.
10. Floor-to-ceiling display windows attached to the exterior walls of buildings, with a structural floor height of less than 2.20m.
11. Bay windows where the height difference between the window sill and the indoor floor is less than 0.45m, with a clear structural height of 2.10m or more.
12. Porches, columned or columnless canopies, with a width between the outer edge of the structure and the outer edge of the exterior wall of 2.10m or more.
13. Floors where the enclosure structure is not perpendicular to the horizontal plane, with a clear structural height ranging from 1.20m to 2.10m.
14. Light wells with roofs should be calculated as one floor, with a clear structural height of less than 2.10m.
15. Sloping roofs that form part of the building’s structure, with a clear structural height of 1.2–2.1m.
16. Building spaces under stadium stands, with a clear structural height of 1.2–2.1m.
17. Stadium stands with roofs but no enclosures.
18. The covered sections of ramps located outside the entrance/exitation walls.
19. Elevated corridors between buildings, either without enclosures or with enclosures.
20. Outdoor corridors with enclosures, or porches with enclosures (or columns).
21. Outdoor staircases.
22. Balconies located outside the main structural framework of a building.
23. Carports, storage sheds, platforms, gas stations, and toll booths with roofs but no enclosures.

III. Do not calculate area
1. Sloping roofs that form part of the building’s structure, with a clear structural height of less than 1.2m.
2. Building spaces under stadium stands, with a clear structural height of less than 1.2m.
3. Floors where the enclosure structure is not perpendicular to the horizontal plane, with a clear structural height of less than 1.20m.
4. Building components that are not connected to the main structure of the building.
5. Open public spaces and building passages on the ground floor of arcades or covered walkways.
6. Walkways and platforms used for hanging curtains and sets on stage and backstage.
7. Terraces, outdoor swimming pools, flower beds, rooftop water tanks, and decorative structural elements.
8. Operational platforms, loading platforms, installation platforms, and platforms for tanks within buildings.
9. Base courses, wall columns, steps, wall plastering, decorative surfaces, tiled surfaces, decorative curtain walls. Air conditioning units placed outside the main structure, columns, components, and accessories. Columnless canopies with a protrusion width of less than 2.10m, as well as columnless canopies with a roof height equal to or exceeding two floors.
10. Bay windows where the height difference between the window sill and the indoor floor is less than 0.45m, with a clear structural height of less than 2.10m; bay windows where the height difference between the window sill and the indoor floor is 0.45m or more.
11. Outdoor ladders and specialized outdoor fire stairs.
12. Observation elevators without enclosures.
13. Underground civil defense passages outside the building, as well as independent chimneys, flues, trenches, oil (water) tanks, gas tanks, water towers, oil (water) storage tanks, warehouses, and piers