For floors where the enclosure structure is not perpendicular to the horizontal plane, the calculation shall be based on the horizontal area of the outer wall periphery of its bottom plate..
15.
The building area of the overhead floor of buildings and the overhead floor of the hanging feet of buildings on the slope shall be calculated according to the horizontal projection of the roof.
14.
For outdoor corridors (cantilevered corridors) with enclosure facilities, 1/2 of the area shall be calculated according to the horizontal projected area of the structural floor; For the eaves gallery with enclosure (or column), 1/2 area shall be calculated according to the horizontal area around the enclosure (or column).
The area of the stadium stands with roof but without enclosure shall be calculated as 1/2 of the horizontal projected area of the roof.
If the structural storey height is 2.20m or above, the total area shall be calculated; 1/2 area shall be calculated if the structural floor height is less than 2.20m.
The stage lighting control room with enclosure shall be calculated according to the horizontal area of its enclosure.
(The window is attached to the exterior wall of the building, and the other is on the ground) 13.
The building area of the building shall be calculated according to the sum of the horizontal areas of the outer wall structure of the natural floor.
For cantilevered stands with enclosure facilities set separately indoors, the building area shall be calculated according to the horizontal projection area of the stand structure floor.
Basement and semi basement shall be calculated according to the horizontal area of their structure periphery.
7.
If the structural storey height is 2.20m or above, the total area shall be calculated; 1/2 area shall be calculated if the structural floor height is less than 2.20m.
For the building space under the grandstand of the venue, the full area shall be calculated for the part where the clear height of the structure is 2.10m or more; 1/2 area shall be calculated for parts with clear height of 1.20m and above to 2.10m and below; The building area shall not be calculated for the part with the clear height of the structure below 1.20m.
8.
The floor window attached to the external wall of the building shall be calculated according to the horizontal area of its enclosure.
The building area should be accurately calculated from the beginning of land acquisition, project estimation, design budget estimate, project bidding, construction process, final account of completion, and cost analysis.
The building area of the hall and lobby of the building shall be calculated on the basis of the first floor, and the building area of the corridor set in the hall and lobby shall be calculated on the basis of the horizontal projection area of the corridor structure floor.
If there is no structural layer, it shall be calculated as one layer, and if there is structural layer, it shall be calculated separately according to its structural layer area.
If the structural storey height is 2.20m or above, the total area shall be calculated; 1/2 area shall be calculated if the structural floor height is less than 2.20m.
If the structural storey height is 2.20m or above, the total area shall be calculated; 1/2 area shall be calculated if the structural floor height is less than 2.20m.
The area of the part with top cover on the ramp outside the entrance and exit external wall shall be calculated as 1/2 of the horizontal area of the external wall structure.
If the structural storey height is 2.20m or above, the total area shall be calculated; 1/2 area shall be calculated if the structural floor height is less than 2.20m.
If the structural storey height is 2.20m or above, the total area shall be calculated; 1/2 area shall be calculated if the structural floor height is less than 2.20m.
(With enclosure facilities) (with enclosure structure) 10.
For stereoscopic bookstores, stereoscopic warehouses and stereoscopic garages, if there is an enclosure structure, the building area shall be calculated according to the horizontal area around the enclosure structure; If there is no enclosure structure or enclosure facilities, the building area shall be calculated according to the horizontal projection area of the structural floor.
6.
(If there is only one floor, the building area will not be calculated separately) 12.
16.
(The cloister is a kind of corridor.
For the sloping roof forming the building space, the full area shall be calculated for the part with the clear height of the structure of 2.10m and above; 1/2 area shall be calculated for parts with clear height of 1.20m and above to 2.10m and below; The building area shall not be calculated for the part with the clear height of the structure below 1.20m.
（1） The scope and rule of the building area to be calculated 1.
with enclosure on the top of the building, if the structural floor height is 2.20m or above, the full area shall be calculated; 1/2 area shall be calculated if the structural floor height is less than 2.20m.
The building area of the porch shall be calculated as 1/2 of the horizontal projected area of its roof; The building area of the canopy with columns shall be calculated as 1/2 of the horizontal projected area of its structural plate; If the width from the outer sideline of the structure without column canopy to the outer sideline of the external wall structure is 2.10m or more, the building area shall be calculated as 1/2 of the horizontal projected area of the canopy structural plate.
4.
Whether you are in the construction unit, construction unit, or consulting company, you need to know this calculation rule.
If the structural storey height is 2.20m or above, the total area shall be calculated; 1/2 area shall be calculated if the structural floor height is less than 2.20m.
11.
5.
The lobby is calculated by the first floor.) 9.
17.
For overhead corridors between buildings with roof and enclosure structure, the total area shall be calculated according to the horizontal area around the enclosure structure; If there is no enclosure structure or enclosure facilities, 1/2 of the area shall be calculated according to the horizontal projection area of the structural floor.
The building area of the gate bucket shall be calculated according to the horizontal area of its enclosure, and the full area shall be calculated if the structural floor height is 2.20m or above; 1/2 area shall be calculated if the structural floor height is less than 2.20m.
(The plinth is not considered when calculating the building area) 2.
18.
When there are local floors in the building, for the second floor and above of local floors, the horizontal area around the enclosure structure shall be calculated if there is an enclosure structure, and the horizontal area of the structural floor shall be calculated if there is no enclosure structure, and the full area shall be calculated if the structural floor height is 2.20m or above, and 1/2 area shall be calculated if the structural floor height is below 2.20m.
For staircases, water tank rooms, elevator machine rooms, etc.
3.
For the projecting (floating) window with the height difference between the windowsill and the indoor floor below 0.45m and the clear height of the structure above 2.10m, 1/2 of the area shall be calculated according to the horizontal area of the perimeter of the enclosure.