2 Take the connection point as the dividing line.

If the outdoor elevator shaft is attached to a building with a retaining structure, the construction area should be calculated according to the natural layer of the building. If there is no enclosure structure, that is, there is no shaft, such as outdoor sightseeing elevators and other outdoor elevators that run up and down by guide rails, they can only be regarded as ancillary equipment and cannot calculate the construction area.

4 Construction area calculation rules

First, calculate the scope of the building area.

1. Single-storey buildings, regardless of height, are calculated as one floor, and their construction area is calculated as the horizontal area above the external wall of the building. If there are several floors in a single-story building, the building area should also be calculated.

2. For single-story buildings with high and low spans, if the construction area needs to be calculated separately, when the high span is a side span, the construction area shall be calculated by multiplying the horizontal length between the outer surfaces of gables at both ends above the foot by the horizontal width from the outer surface of the outer wall above the foot to the edge of the high-span column; When the high span is a middle span, its construction area is calculated by multiplying the horizontal length between the outer surfaces of gables at both ends above the foot by the horizontal width of the outer edge line of the central column.

3. The construction area of multi-storey buildings is calculated according to the sum of the construction areas of each floor, the bottom floor is calculated according to the peripheral horizontal area above the external wall of the building, and the second floor and above are calculated according to the horizontal area of the external wall.

4. The construction area of basements, semi-basements, underground workshops, warehouses, shops, underground headquarters and corresponding entrances and exits shall be calculated according to the horizontal area of the periphery of the upper external wall (excluding light wells, moisture-proof layers and their protective walls).

5. Use deep foundation as underground overhead floor. If the height exceeds 2.2 meters, the construction area shall be calculated according to half of the horizontal area outside the overhead floor.

6. The building on the slope is an overhead floor with hanging feet. If the height exceeds 2.2 meters, the construction area shall be calculated according to the horizontal area of the retaining structure.

7. No matter the height of the passage through the building, the entrance hall in the building and the entrance hall, the construction area is calculated as one floor. Halls and corridors in hallways should be calculated according to their horizontal projection area.

8. The stacks of the library should calculate the construction area according to the bookshelves.

9. The construction area of elevator shaft, elevator shaft, garbage chute and pipeline shaft shall be calculated according to the natural floor of the building.

10. The construction area of the stage lighting control room is calculated by multiplying the horizontal area of the peripheral protection by the actual number of floors.

1 1. If the technical height in the building exceeds 2.2m, the construction area shall be calculated.

12. The construction area of the awning with columns is calculated according to the horizontal area around the columns; The construction area of the independent column awning is calculated according to half of the horizontal projection area of its top cover.

13. The construction area of carports, carports and platforms with columns shall be calculated as half of the horizontal projection area of their roofs.

14, stairwell, water tank room, elevator machine room with protruding roof envelope, etc. The construction area is calculated according to the horizontal area around the envelope.

15, the door hopper protruding from the wall is calculated according to the horizontal area of the periphery of the retaining structure.

16, closed balcony, gallery, construction area is calculated according to its horizontal projection area. The construction area of concave balcony and cantilever balcony is calculated according to half of its horizontal projection area.

17. The construction area of the corridor and eaves gallery with a top cover and columns outside the building wall is calculated according to the horizontal area of the exterior line of the column, and the construction area of the corridor and eaves gallery without columns is calculated according to half of its projected area.

18. The overhead corridor with a roof between two buildings shall be calculated according to the projected area of the corridor. The construction area of overhead corridor without roof is calculated as half of its projected area.

19, the outdoor staircase is used as the main passage and used for evacuation, calculated according to the horizontal projection area of each floor; The construction area of stairs in the building and outdoor stairs is calculated according to half of their horizontal projection area.

20, across other buildings, structures of elevated single-storey building, according to its horizontal projection area calculation of construction area, multi-storey calculation.

Second, do not calculate the scope of the construction area

1. Components, fittings and artistic decorations that highlight the wall surface, such as columns, cribs, footholds, steps, pillar-free awnings, etc.

2. Outdoor ladders for maintenance and fire fighting.

3. The height of the technical layer is within 2.2m..

4 independent chimneys, flues, oil tanks, water towers, oil (water) storage tanks, silos, circular warehouses, underground civil air defense trunk lines, branch lines and other structures.

5. Operating platform, feeding platform in the building, and platform for placing boxes and cans in the building space.

6. Roof water tank with closed structure. Overpass and platform, stage and backstage are hung with curtains and scenery.

7. Single-storey rooms such as operation room, control room and instrument room separated in a single-storey building.

8, the height is less than 2.2 meters deep foundation underground overhead layer, inclined building hanging scaffolding overhead layer.

Third, others.

When calculating the construction area of a building, if there are circumstances other than the above, it can be handled with reference to the spirit of the above provisions.

Attachment: Code for Design of Residential Buildings by the Ministry of Construction

(BGJ96-98) excerpt

Article 2.5.2 The calculation of usable area in the suite shall meet the following requirements:

1. The usable area of the suite includes the total area of bedroom, living room, lobby, aisle, kitchen, bathroom, toilet, storage room and wardrobe.

Two, duplex apartment indoor stairs according to the total area of natural floors included in the use area.

3 chimneys, ventilation pipes and pipe wells not included in the structural area are included in the use area.

Four, the interior wall decoration thickness is included in the use area.