The new "Construction Building Area Calculation Specifications" has been implemented for 15 months. The new version of the specifications has changed a lot, and it is very powerful for many current tricks of "stealing area". In order to prevent friends engaged in real estate research and development from violating the norms and not touching the red line, they will steal area as much as possible. The most powerful experts were specially invited to interpret the "New Building Area Calculation Specifications" one by one. I hope everyone likes it:
Part 1: Principles for compiling new area specifications
Revise the overall principle
1. Scope of application: The "full construction process" has been added. This revision will expand the scope of application to the entire construction process, including planning, design, construction, completion settlement, etc. However, the property area of the house does not apply to this specification;
2. The principle that the balcony area is mainly calculated based on the main structure;
3. The building space that can be used (regardless of whether the design is clearly used) is calculated, and the design is cancelled;
4. General calculation principles: In this specification, the general order of determination is: if there is an enclosure structure, the area is calculated according to the enclosure structure; if there is a base plate, the area is calculated according to the base plate (outdoor corridor, overhead corridor); if the base plate is not conducive to calculation, the roof cover (carport shed, cargo shed, etc.) will be taken. The ancillary facilities outside the main structure shall be calculated based on the structural base plate;
5. All building components involved in this specification shall comply with the requirements of the current national design, construction, quality, safety and other specifications.
Part 2: Contents of the revision of the new area specification
1. The building overhead floor was added, and the area calculation of deep infrastructure overhead floor was cancelled;
2. The area calculation with permanent ceiling was cancelled, and the area calculation regulations for unenclosed structures and enclosed facilities were added;
3. The area calculation regulations for floor-to-ceiling windows, door buckets, corridors, etc. were revised;
4. The building area calculation requirements for bay windows were added;
5. The enclosed structure was not The area calculation regulations for buildings that are perpendicular to the horizontal plane and exceed the outer edge of the base plate;
6. The area calculation requirements for the original outdoor stairs emphasized by the original outdoor stairs were deleted;
7. The area calculation regulations for the balcony were revised;
8. The area calculation regulations for the external insulation layer were revised;
9. The area calculation regulations for the equipment layer and pipeline layer were revised;
10. The area calculation regulations for the porch were increased;
11. The area calculation regulations for the lighting well with ceiling were increased.
Part 3: New Area Specification Terms Explanation
Half version specification deleted terms: corridor, enclosing curtain wall , decorative curtain wall, viewing room, permanent ceiling. Removed terms named by using functions. The new terms added to the
new version of the specification: building area, building space, structural height, structural floor, porch, stairs, main structure, terrace, and steps. Some of the original terms modified by
: floor height, overhead floor, corridor, balcony, bay window, arcade, crossing street building, etc.
1. The new term
clearly states that railings, railings, etc. do not belong to enclosure structures. The installation of enclosure facilities should comply with relevant safety standards.
main structure is what we commonly call the load-bearing structure or stress-bearing system, and is a system that bears "all upper loads".
Steps refer to step-type connecting components for people to walk on different elevations at the entrances and exits of buildings or at different elevations on the same floor. The outdoor steps also include a platform at the connection to the entrance and exit of the building.
2. The modified term
Balcony has three main properties: one is that the balcony is a building component attached to the exterior wall of the building; the second is that the balcony should have railings, railings and other enclosure facilities or windows; the third is that the balcony is an outdoor space.
There are two situations for balcony: one is a balcony outside the exterior wall and the main structure, which belongs to the main structure; the other is a balcony outside the exterior wall and the main structure, which belongs to the main structure.
Sometimes, the design also marks the parts inside the exterior wall and the main structure as balcony, but by definition, the balcony is ancillary facilities outside the exterior wall, and the balcony inside the exterior wall should not actually be called a balcony.In order to clearly express the rules of different situations and avoid confusion for everyone, this specification is classified as a balcony within the main structure.
4. New regulations for calculating building area
1. Different floor heights, different area calculations
3.0.1 The building area of a building should be calculated based on the sum of the outer horizontal areas of the natural layer exterior wall structure. If the structural layer height is 2.20m or above, the full area should be calculated; if the structural layer height is below 2.20m, the area should be calculated.
[Old Specification]
3.0.1 The building area of a single-story building should be calculated based on the periphery of the structure above its exterior wall, and should comply with the following regulations:
1 The full area of a single-story building with a height of 2.20m or above; 1/2 of the area should be calculated if the height is less than 2.20m.
3.0.3 The first floor of a multi-story building should be calculated based on the outer horizontal area of the structure above its exterior wall; the floor above its second floor should be calculated based on the outer horizontal area of the structure above its exterior wall. If the floor height is 2.20m or above, the full area should be calculated; if the floor height is less than 2.20m, the area should be calculated.
1. This specification no longer distinguishes between single-story buildings and multi-story buildings, and the rules for calculating the building area are uniformly stipulated.
2. Structural layer height refers to the "vertical distance between the upper surface of the floor or ground structural layer and the upper surface of the upper structure layer".
❶ When both upper and lower are floors, the structural floor height is the vertical distance between the upper surfaces of the structural layers of two adjacent floor slabs.
❷The bottom floor of the building is calculated from the upper surface of the "concrete structure" to the upper surface of the upper floor slab structure layer.
is divided into two situations: one is that if there is a concrete base plate, it starts from the upper surface of the base plate (if there is an upper reverse beam on the base plate, it should start from the upper surface of the upper reverse beam); the other is that if there is no concrete base plate and has a ground structure, it starts from the upper surface of the upper surface of the upper concrete cushion layer or the concrete leveling layer in the ground structure.
❸The top floor of the building is calculated from the upper surface of the floor structural layer to the upper surface of the roof structural layer.
3. Slitting refers to the thickened part of the building's exterior wall and outdoor floor or part of the wall that is in contact with the scattered water. It cannot represent the entire exterior wall structure, so footing is not considered when calculating the building area.
4. When the exterior wall structure itself is not equally thick within a floor height range (excluding the foot, the material of the exterior wall structure remains unchanged within the floor height range), the periphery horizontal area at the elevation of the building ground structure is calculated.
5. The lower part is masonry and the upper part is a building surrounded by color steel plates (commonly known as light steel plant buildings). The calculation of its building area:
When h is below 0.45m, the building area is calculated based on the periphery horizontal area of the color steel plate; when h is above 0.45m and above, the building area is calculated based on the periphery horizontal area of the lower masonry.
2. Calculate the area of the floor with a partial second floor or above on the same floor. When there are local floors in a building, for the second floor or above on the partial floor, if there is a partial floor or above, if there is a closed structure, the horizontal area of the outer peripheral area of the enclosure structure, and if there is no enclosure structure, it should be calculated based on the horizontal area of the structural base plate. If the structural floor height is 2.20m or above, the full area should be calculated. If the structural floor height is less than 2.20m, 1/2 of the area should be calculated.
[Old Specification]
3.0.2 If there are partial floors in a single-story building, the second or above of the local floors should be calculated based on the outer horizontal area of the enclosure structure, and those without enclosure structures should be calculated based on the horizontal area of the structural base plate. If the floor height is 2.20m or above, the full area should be calculated; if the floor height is less than 2.20m, the area should be calculated.
1. This specification no longer emphasizes the concept of "setting within single-story buildings". Whether it is single-story or multi-story, this article applies to local floors set up in a natural floor, such as duplex houses.
2. There are local floors in the building, and the first floor area has been included in the original building and cannot be calculated repeatedly. Therefore, the building area of local floors should be calculated from above the second floor.
[Example] The above picture is an example. Assuming that the floor heights of local floors ①, ② and ③ are all more than 2.20m, calculate the building area.
Solution: First floor building area = 50×10=500m2
Local floor with enclosed structure ② Building area = 5.49×3.49=19.16m2
Local floor without enclosed structure (with enclosed facilities) ③ Building area = (5+0.1)× (3+0.1)=15.81m2
Total building area = 500+19.16+15.81=534.97m2
Question: If does not have a railing, can the area be calculated?
3. Calculate the area of sloped roofs for forming a building space. For parts with a net height of 2.10m and above, the full area should be calculated; parts with a net height of 1.20m and above to below 2.10m should be calculated 1/2 of the area; parts with a net height of 1.20m and below should not be calculated.
[Old Specification]
3.0.1 The building area of a single-story building should be calculated based on the periphery of the structure above the exterior wall, and should comply with the following provisions:
3.0.2 When using the space inside the sloped roof, the full area should be calculated at the parts with a net height of more than 2.10m; the area with a net height of less than 1.20m should be calculated at the parts with a net height of 1/2 to 2.10m; the area with a net height of less than 1.20m should not be calculated at the parts with a net height of less than 1.20m.
3.0.4 In the slope roof of a multi-story building and under the stadium, the area where the net height exceeds 2.10m when used in the design should be calculated; the area where the net height is between 1.20m and 2.10m should be calculated 1/2 of the area; the area should not be calculated when the design is not used or the indoor net height is less than 1.20m.
[Example] The size of the building space under a slope roof is shown in the figure. The building is 50m long, and its building area is calculated.
Solution: Full area part: S=50×(15-1.5×2-1.0×2)=500m2
1/2 Area part: S=50×1.5×2×1/2=75m2
Total building area: S=500+75=575m2
4. Calculate the area of the venue stand
3.0.4 For the building space under the venue stand, the total area should be calculated with the structure with a net height of 2.10m and above; the area with a net height of 1.20m and above to below 2.10m should be calculated with the structure with a net height of 1.20m and above to below 2.10m and above, the building area should not be calculated with the structure with a net height of 1.20m. For cantilever stands with enclosure facilities that are separately installed indoors, the building area should be calculated based on the floor of the stand structure horizontal projection area . Stadium stands with roof covers and no enclosures should be calculated as 1/2 of the horizontal projection area of the roof cover.
This article has three meanings, all of which are for venues, but the scope of application is different:
First, for the architectural space under the stands, it is applicable to both the "field" (the roof cover is not closed) and the "house" (the roof cover is closed);
Second, for the indoor single cantilever stands, it is only applicable to the "house";
Third, for the stands with roof covers and no enclosure structures, it is only applicable to the "field".
Note:
The stands with a roof cover without an enclosure must have enclosure facilities.
The cantilever stand with enclosed facilities is set up separately in the room as shown in the figure below. Whether it is a single-story or double-story cantilevered stand, the building area is calculated based on the respective "horizontal projection area of the base plate of the stand structure".
"field" stand
(1) The stand with a roof cover without an enclosure structure, 1/2 of the building area is calculated based on the roof cover. The range for calculating the building area should be the horizontal projection area of the overlapping part of the stand and the roof.
(2) When there is a double-layer stand, the building area of each floor is calculated separately, and the top cover and the upper stand are considered as the covers of the lower stand.
(3) The stand without a roof cover does not calculate the building area (the building space under the stand is calculated according to the first paragraph of this article).
5. Calculation of basement area
3.0.5 Basements and semi-basements should be calculated based on the horizontal area of their structure periphery. The full area should be calculated if the structural layer height is 2.20m or above; the structural layer height is below 2.20m or above, the area should be calculated if the structural layer height is 2.20m.
[Old Specification]
3.0.5 Basements, semi-basements (workshops, shops, stations, garages, warehouses, etc.), including corresponding entrances and exits with permanent ceilings, should be calculated based on the horizontal area surrounding the outer edge of the upper end of the exterior wall (excluding the lighting wells, exterior wall moisture-proof layers and their protective walls). If the floor height is 2.20m or above, the full area should be calculated; if the floor height is less than 2.20m, the area should be calculated.
1. Since the calculation principles of basements and semi-basements are consistent with normal floors, there is no need to strictly divide the basements and semi-basements when calculating the building area.
2. Basements and semi-basements are calculated according to the "level area of the periphery of the structure" and are no longer determined according to the "top entrance of the exterior wall". When the exterior wall is in a variable cross-section, it is calculated based on the peripheral horizontal area at the elevation of the basement and semi-basement floor floor structure.
6. Calculation of outdoor ramp area
3.0.6 The area where the ramp on the outside of the entrance and exit exterior wall has a roof cover should be calculated as 1/2 of the outer horizontal area of the outer wall structure.
[Old Specification]
3.0.5 Basements, semi-basements (workshops, shops, stations, garages, warehouses, etc.), including corresponding entrances and exits with permanent ceilings, should be calculated based on the horizontal area surrounding the outer edge of the upper end of the exterior wall (excluding the lighting wells, exterior wall moisture-proof layers and their protective walls). If the floor height is 2.20m or above, the full area should be calculated; if the floor height is less than 2.20m, the area should be calculated.
1. The calculation of the building area of the entrance and exit ramp should meet two conditions: one is to have a roof cover, and the other is to have a side wall (that is, the "exterior wall structure" mentioned in the specification, but the side walls are not necessarily closed). When calculating the building area, the parts with a roof cover are calculated based on the horizontal area of the outer wall (side wall) structure; even if there is a side wall, the building area is not calculated.
2. This article not only applies to basement and semi-basement entrances, but also to ramp upward entrances and exits.
3. The entrance and exit ramps of this specification only calculate half of the area regardless of the height of the structural layer, which is different from the old specification.
4. Since the ramp extends from the inside of the building to the outside of the building, the part inside the building is calculated normally with the building, and the part outside the building is implemented in accordance with this article. The inside and outside of the building are divided by the outer edge of the building's exterior wall structure. See the picture on the next page.
In the above picture, the red line indicates the outer edge of the exterior wall structure of the building. The left and lower parts of the line belong to the entrance and exit of the ramp, and follow this article.
7. Calculation of overhead floor area
3.0.7 The overhead floor of a building and the stilt building stilt floor empty floor should be calculated based on the horizontal projection of its roof panel. If the structural layer height is 2.20m or above, the full area should be calculated; if the structural layer height is below 2.20m, the area should be calculated.
[Old Specification]
3.0.6 If the stilt building stilt empty layer and deep infrastructure empty layer are designed and utilized and have an enclosed structure, the full area should be calculated where the floor height is 2.20m or above; 1/2 of the area should be calculated where the floor height is less than 2.20m. The design of building stilt empty layers without enclosure structures should be calculated based on 1/2 of the horizontal area of the use part; the design of the design of deep infrastructure stilt empty layers, slope stilt empty layers, multi-story building sloping roofs, and under the stadium stands should not be calculated.
1. Overhead floors are common in overhead floors where school teaching buildings, residential projects and other projects are set up on the ground floor. Some buildings have overhead floors on one or more floors or even multiple floors. Some buildings have deep infrastructure overhead floors or stilt floors using slopes to set up stilt floors as public activities, parking, greening and other spaces.
2. The overhead layer refers to "an open space layer with only structural support but no outer structure". As long as the available state is available, the building area is calculated. The "stilt empty layer" mentioned in the
specification is also without a envelope structure, as shown in the figure below.
3. This specification only applies to the old specifications for stilted buildings and deep infrastructure stilted buildings, and expands them into stilted buildings and stilted buildings stilted buildings. At the same time, the calculation rules were adjusted, and the building area of the overhead floor was changed to be calculated based on the horizontal projection of the roof panel. The area with a floor height of 2.20m and above should be calculated for the full area, and the area with a floor height of less than 2.20m should be calculated for 1/2 of the area.
4. The horizontal projection area of the roof panel refers to the horizontal projection area of the roof panel of the overhead layer structure, and does not include the outer lifting parts such as balcony, air conditioning board, and horizontal lifting board outside the main structure of the overhead layer.
[Example] Calculate the building area of the overhead floor of the teaching building in the right picture.
Solution: S=15×(4.5+1.8)=94.5m2
[Example] Calculate the building area of the empty floor of the stilt in the right picture.
Solution: S=5.44×2.8=15.23m2
8. Calculate the area of the hallway and hall of a building
3.0.8 The building area of the building should be calculated based on the first floor, and the corridors set up in the hallway and hall should be calculated based on the horizontal projection area of the corridor structure base plate. If the structural layer height is 2.20m or above, the full area should be calculated; if the structural layer height is below 2.20m, the area should be calculated.
[Old Specification]
3.0.7 The building area is calculated on the first floor of the building. When there are corridors in the foyer and lobby, they should be calculated based on the horizontal area of the structural base plate. If the floor height is 2.20m or above, the full area should be calculated; if the floor height is less than 2.20m, the area should be calculated.
This article is exactly the same as the actual content of the old specification. It only changes the "corridor" to "corridor" (the corridor is a type of corridor), and the expression is more comprehensive. The yellowed part in the picture below is classified as a corridor.
9. Calculate the area of overhead corridors
3.0.9 If the overhead corridors between buildings have roof covers and enclosed structures, the full area should be calculated based on the horizontal area of the outer periphery of the enclosed structure; if there is no enclosed structure or enclosed facilities, 1/2 of the area should be calculated based on the horizontal projection area of the structural base plate.
[Old Specification]
3.0.8 Overhead corridors with enclosure structures between buildings should be calculated based on the horizontal area of the outer periphery of its enclosure structure. If the floor height is 2.20m or above, the full area should be calculated; if the floor height is less than 2.20m, the area should be calculated. If a permanent top cover or no enclosure structure should be calculated as 1/2 of the horizontal area of its structural base plate.
1. Overhead corridor refers to "a space specially set on the second or above of a building as a horizontal traffic space between different buildings."
2. Regarding the meaning of "top cover and enclosed structure" in the specification:
The old specification only mentioned "enclosed structure". This specification was modified to "top cover and enclosed structure". The two specifications are expressed in different ways, but the essential meaning has not changed.
3. The calculation of the building area of an overhead corridor is divided into two situations:
. One is that there is an enclosed structure and a roof cover, which calculates the full area; the other is that there is no enclosed structure and an enclosed facility. Regardless of whether there is a roof cover, it is calculated by 1/2 of the area.
If there is an enclosure structure, the area shall be calculated according to the enclosure structure; if there is no enclosure structure, the area shall be calculated according to the base plate.
4. Since there is no cover in the overhead corridor, sometimes the structural layer height cannot be calculated, so the standard does not consider the layer height factor.
10. Calculate the area of the "three libraries"
3.0.10 If there is a three-dimensional library, three-dimensional warehouse, and three-dimensional garage, if there is an enclosed structure, the building area should be calculated based on the horizontal area of the outer periphery of the enclosed structure; if there is no enclosed structure or enclosed facilities, the building area should be calculated based on the horizontal projection area of the structural base plate. Those without structured layers should be calculated as one layer, and those with structured layers should be calculated as their structural layer area. If the structural layer height is 2.20m or above, the full area should be calculated; if the structural layer height is below 2.20m, the area should be calculated.
[Old Specification]
3.0.9 For three-dimensional library, three-dimensional warehouse, and three-dimensional garage, those without structural layers should be calculated as one layer, and those with structural layers should be calculated as their structural layer area. If the floor height is 2.20m or above, the full area should be calculated; if the floor height is less than 2.20m, the area should be calculated.
1. This specification adds three-dimensional library, three-dimensional warehouse, and three-dimensional garage without enclosure structures and enclosure facilities. As shown in the figure below:
2. If there is an enclosure structure, the area shall be calculated according to the enclosure structure; if there is no enclosure structure, the area shall be calculated according to the base plate.
Note: The lifting equipment in the three-dimensional garage does not belong to the structural layer and does not calculate the building area.
The above two figures can only calculate the building area of one floor.
The three-dimensional shelves in the warehouse and the three-dimensional bookshelf in the library are not considered structural layers.
11. Calculation of special building area
3.0.11 A stage lighting control room with an enclosed structure should be calculated based on the horizontal area of its enclosed structure. If the structural layer height is 2.20m or above, the full area should be calculated; if the structural layer height is below 2.20m, the area should be calculated.
[Old Specification]
3.0.10 A stage lighting control room with an enclosed structure should be calculated based on the horizontal area of its enclosed structure. If the floor height is 2.20m or above, the full area should be calculated; if the floor height is less than 2.20m, the area should be calculated.
12. Window area calculation
3.0.12 Floor-to-ceiling windows attached to the exterior wall of a building should be calculated based on the horizontal area of the outer periphery of its enclosure structure. If the structural layer height is 2.20m or above, the full area should be calculated; if the structural layer height is below 2.20m, the area should be calculated.
[Old Specification]
3.0.11 Floor-to-ceiling windows, door buckets, corridors, corridors, and eaves corridors with enclosure structures outside the building should be calculated based on the horizontal area of the outer periphery of the enclosure structure. If the floor height is 2.20m or above, the full area should be calculated; if the floor height is less than 2.20m, the area should be calculated. If a permanent top cover or no enclosure structure should be calculated as 1/2 of the horizontal area of its structural base plate.
1. Definition of floor-to-ceiling windows, this specification has been adjusted from the old specification "floor-to-ceiling windows with enclosure structures outside the building" to "floor-to-ceiling windows attached to the exterior walls of the building."
windows are inside the main structure of the building and outside the main structure of the building. The windows in the main structure of the building are shown in the picture on the right:
The windows in the main structure of the building have a building area calculated with the natural floor and these terms are not implemented.
The window outside the main structure of the building belongs to the attached structure of the building, and "attached to the exterior wall of the building" clearly reflects this meaning.
"Floor-standing" means that there is a foundation set up under the window.
Since the elevation of the roof and bottom plates of "floor-to-ceiling windows attached to the exterior walls of the building" is not necessarily consistent with the division of the natural layer, this line is single and not specified with the natural layer.
2. This specification applies only to "floor-to-ceiling windows". If the window has no foundation and is cantilevered, the building area is calculated according to the rules of 3.0.13 convex (floating) windows.
13. Calculate the area of convex (floating) windows
3.0.13 Convex (floating) windows with a height difference between the windowsill and the indoor floor below 0.45m and a net structural height of 2.10m or above should be calculated 1/2 of the area based on the horizontal area of the outer peripheral area of its enclosure structure.
1. Currently commonly known as bay windows or bay windows, there are two main types from the facade: intermittent and continuous ones, as shown in the picture on the right.
From the indoor view, it is also divided into two categories: one is that the floor of convex (floating) windows and the floor of the indoor floor is the same elevation, and the other is that there is a height difference between convex (floating) windows and the floor of the indoor floor (when there is a height difference, the height difference may be above 0.45m or below 0.45m).
2. If there is no height difference or the height difference is below 0.45m, the convex (floating) window actually has certain usage functions, so this specification calculates the building area.
This specification height difference refers to the structural height difference. The structural height difference is determined by 0.45m, which is determined based on design specifications.
3. Two conditions must be met at the same time before the building area can be calculated: one is the structural height difference below 0.45m, and the other is the structural net height of 2.10m and above.
is as shown in the figure below:
height difference is 0.6m0.45m, the net height of the structure is 1.9m2.1m, and both conditions are not met, so the convex (floating) window is not calculated for the building area.
The following figure is, the height difference is 0.3m＜0.45m, the net structure height is 2.2m＞2.1m, and both conditions are met, so the building area of this convex (floating) window should be calculated.
[Example] A convex (floating) window plane size that can calculate the building area is as shown in the figure below, calculate the building area of convex (floating) window.
Solution: S=[1/2×(1.2+2.6)×0.6]×1/2=0.57m2
14. Calculate the area of corridor (slide)
3.0.14 Outdoor corridors (slide) with enclosed facilities should be calculated based on the horizontal projection area of its structural base plate; 1/2 of the eaves corridors with enclosed facilities should be calculated based on the horizontal projection area of its structural base plate; 1/2 of the area should be calculated based on the outer horizontal area of its enclosed facilities (or columns).
[Old Specification]
3.0.11 Floor-to-ceiling windows, door buckets, corridors, corridors, and eaves with enclosure structures outside a building should be calculated based on the horizontal area of the outer periphery of the enclosure structure. If the floor height is 2.20m or above, the full area should be calculated; if the floor height is less than 2.20m, the area should be calculated. If a permanent top cover or no enclosure structure should be calculated as 1/2 of the horizontal area of its structural base plate.
1, outdoor corridors (including pick-up corridors) and eaves are all outdoor horizontal traffic spaces. Among them, the picking corridor is a cantilever horizontal traffic space; the eaves corridor is a horizontal traffic space at the bottom, with eaves or eaves as the top cover, and generally has columns or railings, railings, etc.Outdoor corridors with no enclosure facilities on the ground floor but with columns can be calculated by referring to the rules of the eaves.
No matter which type of corridor, in addition to the ground structure, it must also have railings, railings and other enclosure facilities or columns. Both of these conditions are indispensable. If any condition is missing, the building area will not be calculated.
Horizontal traffic spaces on the first to fourth floors in the figure belong to outdoor corridors.
on the left picture on the second and third floors are the corridor. Although the ground floor has a ground structure, there are no railings, railings or columns, and they do not belong to outdoor corridors and do not calculate the building area. Although there are no railings, railings and other enclosure facilities on the left side of the picture on the right, they have columns and ground structures. The building area is calculated according to the rules of the eaves. The right part has no railings, railings, and columns. It does not belong to the outdoor corridor and does not calculate the building area.
2. Although outdoor corridors (selected corridors) and eaves are all calculated as 1/2 of the area, the calculated calculation parts are different: outdoor corridors (selected corridors) are calculated based on the structural base plate, and eaves are calculated based on the periphery of enclosure facilities (or columns).
15. Calculate the area of the door bucket
3.0.15 The door bucket should calculate the building area based on the horizontal area of the outer periphery of its enclosure structure. If the structural layer height is 2.20m or above, the full area should be calculated. If the structural layer height is less than 2.20m, 1/2 of the area should be calculated.
[Old Specification]
3.0.11 Floor-to-ceiling windows, door buckets, corridors, corridors, and eaves with enclosure structures outside a building should be calculated based on the horizontal area of the outer periphery of the enclosure structure. If the floor height is 2.20m or above, the full area should be calculated; if the floor height is less than 2.20m, the area should be calculated. If a permanent top cover or no enclosure structure should be calculated as 1/2 of the horizontal area of its structural base plate.
1. The door bucket is "the space between the two doors at the entrance and exit of the building". It is a fully enclosed space with a roof cover and an enclosure structure.
2. The door bucket is fully enclosed, and at least one side of the porch and awning are not enclosed.
16. Calculate the area of the canopy
3.0.16 The porch should calculate the building area based on 1/2 of the horizontal projection area of the roof panel; the canopy with columns should calculate the building area based on 1/2 of the horizontal projection area of the structural plate; if the width of the outer edge line of the structural outer edge line of the column-free canopy to the outer edge line of the outer wall structure is 2.10m or more, the building area should be calculated based on 1/2 of the horizontal projection area of the awning structural plate.
[Old Specification]
3.0.16 If the width of the outer edge line of the canopy structure to the outer edge line of the exterior wall structure exceeds 2.10m, it should be calculated as 1/2 of the horizontal projection area of the canopy structure plate.
1. The awning refers to a building component that is set up above the entrance and exit of the building, protruding from the wall, and is separately established to block rainwater. The canopy is divided into columned canopy (including independent column canopy, multi-column canopy, column-wall mixed support canopy, wall-supported canopy) and columnless canopy (cantilever canopy).
2. The calculation area rules for columned awnings and columnless awnings are different
(1) There is no limit on the width of the pole-outlet; if the columnless awnings are outstretched, the building area can only be calculated when the width of the pole-outlet is ≥2.10m. The width of the extruded width refers to the width of the outer edge of the canopy structure to the outer edge of the exterior wall structure. When curved or irregular, it is the maximum width (b in the figure).
(2) The columned canopy is not limited by the number of layers spanned, and the building area can be calculated. As shown in the picture on the right, the roof panel with column canopy spans the layer, reaching the elevation of the second floor roof panel, and the building area can still be calculated.
(3) The column-free canopy cannot cross the layer. If the roof slab spans the floor, the building area is not calculated.
3. Porch refers to a part that has no doors, walls on three or two sides, and has a board (or borrowed from the upper floor slab) to maintain it. The porch is divided into fully concave and semi-concave and semi-convex. When it is fully convex, it is classified as a wall supporting awning.
4. The roof cover is not set up separately, and the upper structural panels (such as floor slabs and balcony floor slabs) are used for cover. They are not considered as a canopy and the building area is not calculated.
5. Principle of judgment of mixing situations
judgment principle:
is based on the principle of not recalculating the area. When an attached building component has two or more functions and the calculated building area is different, the building area is only calculated once and the larger area is taken.
5. Mixed situation judgment
is divided into three situations:
1. The correct judgment method for the picture on the upper right: the second floor is a balcony, and 1/2 of the building area is calculated according to the base plate; the entrance and exit of the first floor is blocked by the upper balcony floor, and it is not considered a canopy and the building area is not calculated. 2. The correct judgment method for the picture below right: the lower part is a columned canopy, and 1/2 of the building area is calculated based on the top cover; the upper part is a terrace set on the canopy, and the terrace does not calculate the building area.
3. The correct judgment method for the right picture: the third floor part of
is the terrace on the roof, and the building area is not calculated. The second layer of
is the balcony within the main structure, and the full area is calculated according to the periphery of the structure.
The bottom floor is blocked by the upper balcony floor, and is not considered a canopy and does not calculate the building area.
17. Calculate the area of stairwells in three situations:
. First, the stairwells, etc. are on the top of the building
3.0.17. Stairwells, water tank rooms, elevator machines, etc. with enclosed structures are located at the top of the building. If the structural floor height is 2.20m or above, the full area should be calculated; if the structural floor height is less than 2.20m, 1/2 of the area should be calculated.
Secondly, stairwells, etc. on other floors of the building
3.0.19 The indoor stairs, elevator shafts, lifting wells, pipeline shafts, ventilation and exhaust shafts, and flue shall be incorporated into the natural floor of the building to calculate the building area. A lighting well with a ceiling should calculate the building area based on the first floor, and if the structural net height is 2.10m or above, the full area should be calculated; if the structural net height is below 2.10m, 1/2 of the area should be calculated.
1. This specification changes the "indoor stairwell" of the old specification to "indoor stairwell", including stairways forming shafts (i.e. indoor stairwells) and stairways without shafts (i.e. indoor stairways). It is clear that indoor stairways without shafts should also be calculated. For example, the building area should be calculated in the lobby of a building, the indoor staircase of a jump (or duplex) house, etc.
2. Indoor stairwell is incorporated into the natural floor of the building to calculate the building area.
Take the picture on the right as an example, with 15 floors above ground and 1 floor underground, so the stairwell is calculated based on 16 floors. The stairwell at the top of the building is also calculated according to Article 3.0.17. 3. The indoor staircase without a stairwell is calculated based on the horizontal projection area of the stairs.
4. Note when calculating the building area of indoor stairs: If the stairs are drawn in the drawings, regardless of whether the user takes care of themselves, the building area will be calculated based on the horizontal projection area of the stairs; if no stairs are drawn in the drawings and are only represented by the hole symbol, the area of the hole will not be deducted when calculating the building area.
5. Indoor public stairwells for leaping and duplex houses: leaping and duplex houses are calculated based on two natural floors; duplex houses are calculated based on one natural floor. A leap house refers to the fact that the house occupies two natural layers, and the bedroom, living room, living room, bathroom, kitchen and other auxiliary rooms are arranged in layers.
Duplex houses are conceptually a natural floor, but the floor height is higher than that of ordinary houses. Take out the mezzanine floor in part and arrange the bedroom or study room and other content.
6. When the natural number of layers on both sides of the indoor public stairwell is different, calculate based on the number of layers with more floors. The stairwell in the figure should calculate the building area of 6 natural floors.
7. Although the equipment pipeline layer is not included in the number of layers described in the design, when calculating the stairwell building area, one natural layer should be calculated.
8. Use the building space at the lower part of the indoor stairs to calculate the building area without repeatedly counting. For example, when using the bathroom or warehouse below the ladder section, the bathroom or warehouse will not calculate the building area separately.
9. The elevator shaft and sightseeing elevator shaft of this specification are merged and are uniformly called elevator shafts.
10, shafts (including elevator shafts, lifting wells, pipeline shafts, ventilation and exhaust shafts, and flue), regardless of the inside and outside of the building, the building area is calculated based on the natural floor, such as wall-mounted flue. However, independent flue does not calculate the building area.
11. Holeways (including indoor stairs, elevator shafts, lifting wells, pipeline shafts, ventilation and exhaust shafts, and flue) calculate the building area according to the natural floor of the building.If the natural layer structure is below 2.20m and the floor itself calculates 1/2 of the area, the corresponding shaft should also calculate 1/2 of the area.
12, Lighting Well
Due to the diversified building designs, the structure of the Lighting Well has also undergone great changes. This specification adds provisions for calculating the building area of a covered daylight well (capped daylight wells include daylight wells in buildings and basement daylight wells). The light well with a ceiling is shown below. Lighting wells without ceiling covers still do not count the building area. No matter how deep or how many floors of lighting are, only one floor is built. The picture on the right is a light-up of two floors, but only one floor is calculated.
3.0.20 Outdoor stairs should be incorporated into the natural floor of the attached building, and the building area should be calculated at 1/2 of its horizontal projected area.
[Old Specification]
3.0.17 Outdoor stairs with permanent ceilings should be calculated as 1/2 of the horizontal projection area of the natural layer of the building.
3.0.24 The following items should not be calculated in area:
7 Overhead corridors without permanent roof covers, outdoor stairs, outdoor steel stairs and ladders for maintenance, fire protection, etc.
This specification cancels the condition that outdoor stairs must have permanent roof covers to calculate the building area, and half of the building area should be calculated whether outdoor stairs have or have no covers.
[Example] The following figure is used as an example. Assuming that the horizontal projection area of the stairs is S=10m2, calculate the outdoor stairs building area.
3. Use the building space at the lower part of the outdoor stairs to calculate the building area without repeatedly counting.
18. Calculate the area of the non-vertical enclosure structure
3.0.18 The floor where the enclosure structure is not perpendicular to the horizontal plane should be calculated based on the horizontal area of the outer wall of its base plate surface. For parts with a net height of 2.10m or above, the full area should be calculated; for parts with a net height of 1.20m or above to below 2.10m, the 1/2 area should be calculated; for parts with a net height of 1.20m or below, the building area should not be calculated.
[Old Specification]
3.0.14 Buildings with enclosure structures that are not perpendicular to the horizontal plane and exceed the outer edge of the base plate should be calculated based on the peripheral horizontal area of the base plate surface. If the floor height is 2.20m or above, the full area should be calculated; if the floor height is less than 2.20m, the area should be calculated.
1. The old specification only stipulates the situation where the enclosure structure is tilted outward, and this specification applies to both inward and outward tilts. In terms of height division, this article uses "clear height", which is different from other normal flat floors divided by floor height, but is consistent with the division principle of sloped roofs. Since many architectural designs are currently pursuing novelty, odd and uniqueness, and the shapes are becoming more and more complex, we cannot clearly distinguish what is an enclosure structure and what is a roof. For example, the eggshell-shaped shell of the National Grand Theater, we cannot accurately say whether it is a wall or a roof. Therefore, in this specification, the same calculation rules are used for inclined enclosure structures and inclined roofs, that is, as long as the shell is inclined, the building area is calculated according to the net height.
Note:
Because the enclosure structure itself should calculate the building area, if we determine it is an inclined enclosure structure, the enclosure structure itself should calculate the building area, and if we determine it is a sloping roof, the roof structure does not calculate the building area. Therefore, although it is sometimes difficult to clearly distinguish the two, in order to achieve the principle of unified calculation, the following provisions are made for the inward inclination of the enclosure structure:
(1) Top floor of a multi- (high)-story building, the outside of the above-floor slabs are considered as roofs, and the area is calculated or not area is calculated according to the net height.
(2) Other floors of multi- (high)-story buildings, the inclined parts are considered as enclosure structures, and the enclosure structure at the bottom plate surface should be calculated for the full area.
(3) For single-story buildings, the calculation principle is the same as other layers of multiple (high)-story buildings, that is, the inclined parts are considered as enclosure structures, and the enclosure structure at the bottom plate surface should be calculated for the full area.
How to calculate the single-layer oblique top?
2. The calculation rules of this clause are relatively complicated. The building area is calculated based on the "horizontal area of the outer wall of the base plate". This is because the enclosure structure is not vertical, it may tilt inward or outward. The horizontal area of the outer wall at each elevation may be different. Therefore, this specification defines it as the horizontal area of the outer wall at the structural base plate.
19. Calculate the balcony area
3.0.21 The balcony within the main structure should calculate the full area based on the horizontal area of its structure peripheral structure; the balcony outside the main structure should calculate the 1/2 area based on the horizontal projection area of its structural base plate.
[Old Specification]
3.0.18 All balconies of buildings should be calculated as 1/2 of their horizontal projected area.
1. The balcony is an outdoor space attached to the exterior wall of a building, equipped with railings or railings, and can be used for people to move around. (From the "Civil Building Design Term Standard"
The old specification is defined as "a building space for users to engage in activities and dry clothes". It is defined only from the use function. This specification clearly defines the essential properties of the balcony.
Balcony has three main attributes:
1. 1. The balcony is a building component attached to the exterior wall of the building;
2. The balcony should have railings, railings and other enclosure facilities or windows;
3. The balcony is an outdoor space.
This specification divides the balcony into two categories: the balcony within the main structure and the balcony outside the main structure, and its building area is different: the main structure The balcony is calculated for the full area, and the balcony outside the main structure is calculated for 1/2 of the area.
The balcony in the two figures above are the balcony inside the main structure, and the full area should be calculated.
2. Judgment of the main structure
(1) Brick-concrete structure: Usually judged by the outer wall (i.e., the enclosure structure, including walls, doors, and windows), the outer wall is the main structure inside, and the outer wall is the outside of the main structure outside.
(2) Frame structure: The column and beam system is the main structure, and the column and beam system is the main structure outside.
(3) Shear wall structure: The situation is relatively complex, divided into four categories.
0①If the balcony is surrounded by the shear wall, it belongs to the main structure and the full area should be calculated.
②If both sides are shear walls, it also belongs to the main structure and the full area should be calculated.
③If only one side of the opposite side is a shear wall, it belongs to the main structure and the half area should be calculated.
④If there is no shear wall on both sides, it belongs to the main structure and the half area should be calculated. As shown in the figure above, the right of the above.
(4) When the shear wall and the frame are mixed in the balcony, there are two situations: ①The corner column is a stressed structure and the foundation is the ground, the balcony is the main structure and the full area should be calculated.
② The corner columns are only shapes and have no foundations. If the balcony is outside the main structure, 1/2 of the area is calculated.
3. The roof cover is no longer a necessary condition for judging a balcony. Whether there is a cover or not, as long as the three main attributes of the balcony are met (attached to the exterior wall of the building, with railings or railings, and outdoor spaces for people to move around) should be classified as a balcony.
4. Regardless of whether the upper and lower layers are aligned, as long as the three main attributes of the balcony are met, it should also be classified as a balcony
5. Other typical situations of the balcony
1. The balcony attributes are not changed due to its name
In the above picture, both balconies should be regarded as balconies surrounded by shear walls, belonging to the main structure, and the full area is calculated.
Secondly, the area of the balcony combined with the inside and outside of the main body is calculated separately.
In the above picture, part of the balcony is inside the main structure and part is outside the main structure. The building area should be calculated separately. Taking the outside of the column as the boundary, the upper part belongs to the main structure, calculates the full area, and the lower part belongs to the outside of the main structure, calculates 1/2 of the area. Third, the area of the flower trough attached to the balcony can also be calculated.
The balcony in the right picture is surrounded by a shear wall, which belongs to the main structure and the full area should be calculated.Although the following part is designed as a flower trough, there is a sliding door between it and the balcony. The flower trough is connected to the interior, has the function of use, and meets the three main attributes of the balcony. Therefore, it should be regarded as a balcony and calculates 1/2 of the area (if the flower trough is not connected to the balcony, the building area should not be calculated).
It is the fourth, the platform connected to the balcony panel.
The structural base plate in the right picture has two uses. The part surrounded by the railing is a balcony, and the outside of the railing (on the left side of the picture) is the equipment platform. According to regulations, 1/2 of the area of the balcony should be calculated, but the equipment platform is not connected to the balcony and the building area is not calculated.
When calculating the balcony building area, the front end is determined according to the outer edge of the structural base plate, and the left side is bounded by the outer edge of the railing. The equipment platform on the left side of the railing does not calculate the building area.
Fifth, the sky garden has balcony attributes.
The part marked as "Air Garden" in the picture above is based on the judgment principle of the balcony and belongs to the main structure. Whether it is closed or not, the full area should be calculated. In other projects, if a situation similar to a house entrance garden occurs, it is also judged according to the principle of the balcony.
6. To sum up, determining whether the balcony is inside or outside the main structure has nothing to do with the following four aspects:
(1) Is there a partition between the balcony and the indoor space;
(2) Whether the balcony is closed;
(3) Whether the balcony is heated;
(4) Where is the insulation layer made.
7. When the balcony is outside the main structure, the building area is calculated based on the structural base plate. At this time, regardless of whether the enclosure facilities are perpendicular to the horizontal plane, the building area is calculated based on the structural base plate, and the protruding part at the base plate should be included.
8. If the height of the natural layer structure is below 2.20m, the balcony in the main structure will be calculated as the floor. However, the balcony outside the main structure will still be calculated by 1/2 of the area, and 1/4 of the area should not appear.
20. Calculate the area of the carport, etc.
3.0.22 Carports, carports, cargo sheds, platforms, gas stations, toll stations, etc. with roof covers and no enclosure structures should be calculated based on 1/2 of the horizontal projection area of the roof cover.
[Old Specification]
3.0.19 Car sheds, cargo sheds, platforms, gas stations, toll stations, etc. with permanent roof covers and no enclosure structures should be calculated as 1/2 of the horizontal projection area of the roof cover.
1. This specification is exactly the same as the old specification. Only the "permanent top cover" is changed to "top cover".
2. No matter the material of the top cover, no single or double columns, no rectangular columns or special columns, all the building area is calculated based on 1/2 of the horizontal projection area of the top cover
3. When there are other buildings under the top cover that can calculate the building area, 1/2 of the area is still calculated based on the horizontal projection area of the top cover, and the building area under the top cover will be calculated separately.
There are buildings below the gas station in the picture above, and their area is still calculated as A×B×0.5, and the building area will be calculated separately.
21. Calculate the exterior wall area of a curtain wall
. First, the situation of the curtain wall as an enclosure structure
3.0.23 Buildings with curtain wall as an enclosure structure should calculate the building area according to the outer line of the curtain wall.
[Old Specification]
3.0.21 For buildings with curtain walls as enclosure structures, the building area should be calculated according to the outer edge of the curtain wall.
Intelligent breathing glass curtain wall (double-layer curtain wall), the two curtain walls and the space between the two layers together form the exterior wall structure, so the building area should be calculated based on the outer edge of the outer curtain wall.
Second, the curtain wall is decorative.
Decorative curtain wall: A curtain wall that is set up as a decorative effect outside the building wall, and the area is not calculated.
22. Calculate the exterior wall area with insulation layer
3.0.24 The exterior insulation layer of a building should be calculated based on the horizontal cross-sectional area of its insulation material and incorporated into the natural floor building area.
The building area is only calculated by the insulation material itself (for example, when the external synthetic board is applied, only the insulating material is considered by the insulation material), and the plastering layer, waterproof (wet) layer, adhesive layer (air layer) and protective layer (wall), etc. are not included in the building area.
that is, the building area of the building is still calculated first according to the exterior wall structure, the building area of the external insulation layer is calculated separately, and incorporated into the building area.
Specific calculation method is:
(1) The insulation layer is multiplied by the net thickness of the insulation material by the length of the outer edge of the exterior wall structure and calculated the building area according to the natural layer of the building.
(2) The length of the outer edge of its exterior wall does not deduct the length of doors and windows and components whose building area has been calculated outside the building (such as balcony, outdoor corridor, door bucket, floor-to-ceiling window and other components).
(3) When components that have calculated the building area outside the building (such as balconies, outdoor corridors, door buckets, floor-to-ceiling windows and other components) have insulation layers, the insulation layer will no longer be calculated for the building area.
Note: 1. "Horizontal cross-sectional area of insulation material" is based on the state where the insulation material is placed vertically and is calculated according to the thickness of the insulation material itself. When the enclosure structure is not perpendicular to the horizontal plane, it should still be calculated based on the thickness of the insulation material itself, rather than the inclined thickness, see the figure below.
2. The calculated building area of the external insulation layer is based on the full laying along the height direction. If the laying height of the outer insulation layer such as the basement does not reach the full height of the floor, the insulation layer will not be calculated for the building area.
3. The composite wall (as shown below) does not belong to the external insulation layer of the exterior wall. It is regarded as an exterior wall structure as a whole. It is implemented in accordance with Article 3.0.1.
23. Calculation of deformation joint area
3.0.25 Deformed joints connected to the interior should be calculated according to their natural layers and within the building area. For buildings with high and low spans, when the high and low spans are connected internally, their deformation joints should be calculated within the low span area.
[Old Specification]
3.0.20 Buildings with high and low spans should be calculated separately based on the outer edges of the high span structure; when the high and low spans are connected internally, the deformation joints should be calculated within the low span area.
3.0.23 The deformation joints in a building should be calculated based on their natural layers and are combined within the building area.
Deformed joints that are not connected to the interior are not calculated for the building area. As shown in the figure below: When the high and low spans are connected internally or partially connected, the area of the deformation joints of the connecting part is calculated within the low span area.
24. Calculate the same area of the equipment layer
3.0.26 For floors with structural layers such as equipment layer, pipeline layer, shelter layer, etc. in a building, if the structural layer height is 2.20m or above, the full area should be calculated; if the structural layer height is less than 2.20m, 1/2 of the area should be calculated.
1, equipment layer and pipeline layer have different specific functions from ordinary floors, but there is no essential difference in structure and construction consumption. In addition, this specification defines natural floor as "floors layered according to the floor structure", so equipment and pipeline layers are also classified as natural floors, and their calculation rules are the same as ordinary floors.
2. If pipes and horse roads are installed in the ceiling space, the ceiling space part cannot be regarded as equipment layer or pipeline layer, and the building area is not calculated. As shown in the picture on the right:
25. The content of the building area should not be calculated
1. Building components that are not connected to the building;
[Old Code]
3.0.24 The following items should not be calculated
6 Legs, wall columns, stacks, steps, wall plasters, decorative surfaces, inlaid material surface layers, decorative curtain walls, air-conditioning outdoor unit shelves (boxes), bay windows, components, accessories, awnings with a width of 2.10m or less, and decorative balcony and gallery that are not connected to the building.
"Not connected to the building" means there is no normal entrance and exit. That is, if you enter and exit through a door, it is considered "connected", and if you turn it out through a window or railing, it is considered "not connected".
2 Open public spaces and building passages on the ground floor of the arcade and crossing buildings
3 Stage and backstage hanging curtains and sets, etc.; [Old Standard]
3.0.24 The following items should not be calculated in the area:
3 Single-story room separated in the building, stage and backstage hanging curtains, sets, etc.
4 Terrace, open-air swimming pool, flower rack, roof water tank and decorative structural components;
[Old Specification]
3.0.24 The following items should not be calculated in area:
4 Roof water tank, flower rack, pergola, terrace, open-air swimming pool.
terrace refers to "a platform with enclosed facilities for people to outdoor activities that are set on the roof, first floor or awning." The terrace must meet four conditions at the same time: one is the location, which is set on the roof, ground or canopy roof, two is the entry and exit, three is the enclosure facilities, and four is the coverless.
5 The operating platform, feeding platform, installation box and tank body platform in the building;
[Old Specification]
3.0.24 The following items should not calculate the area:
5 The operating platform, feeding platform, installation box and tank body platform in the building.
The loading platforms in the figure below do not calculate the building area.
The operating platforms in the figure below do not calculate the building area.
6 Legs, wall columns, stacks, steps, wall plasters, decorative surfaces, inlaid surface layers, decorative curtain walls, air-conditioning outdoor unit shelves (boxes), components, accessories, pick-out column-free awnings with a width below 2.10m and column-free awnings with a ceiling height of or more than two floors;
[Old Specification]
3.0.24 The following items should not be calculated in area:
6 Slitting, wall columns, stacks, steps, wall plasters, decorative surfaces, inlaid material surface layers, decorative curtain walls, air-conditioning outdoor unit shelves (boxes), bay windows, components, accessories, canopies with a width of 2.10m or less, and decorative balcony and corridors that are not connected to the building.
1. The building area should be calculated for structural columns. "Wall-attached columns" that do not calculate the building area refer to non-structural decorative columns.
2. Steps are "stair-shaped steps set up in connection with indoor and outdoor floors or different elevations on the same floor". The outdoor steps also include a platform at the connection with the entrances and exits of the building.
(1) Steps may be built using terrain.
(2) If the steps may use the lower space, the area is calculated based on the roof of the building.
(3) Steps may also be overhead (the height from the starting point to the end point is within a natural floor). 3. Since the stairs are architectural components of "vertical traffic between floors", the height from the starting point to the end point reaches one natural floor or above is called a staircase.
7 Convex (floating) windows with a height difference between the windowsill and the indoor floor and a net height of 2.10m and below, convex (floating) windows with a height difference between the windowsill and the indoor floor and a height difference between the windowsill and the indoor floor and above;
[Old Specification]
3.0.24 The following items should not be calculated in the area:
6 Legs, wall columns, stacks, steps, wall plasters, decorative surfaces, inlaid material surface layers, decorative curtain walls, air-conditioning outdoor unit shelves (boxes), bay windows, components, accessories, canopies with a width of 2.10m and below, and decorative balcony and corridors that are not connected to the building.
8 Outdoor ladders, outdoor special fire-fighting steel stairs;
[Old specifications]
3.0.24 The following items should not be calculated in area:
7 Overhead corridors without permanent roof covers, outdoor stairs, outdoor steel stairs and ladders for maintenance, fire protection, etc.
This specification adjusts the word "used" to the word "special", that is, the dedicated fire-fighting steel stairs do not calculate the building area.
When the steel staircase is a building passage and takes into account fire protection purposes, the building area should be calculated.
Question: Is it reasonable to use
to distinguish the area from the material used to calculate it?
9 A sightseeing elevator without enclosure structure;
1. A sightseeing elevator without enclosure structure is shown in the picture on the right, that is, the elevator car is directly exposed, there is no well wall on the outside, and the building area is not calculated.
2. If the sightseeing elevator is running in the elevator shaft (the well wall is not limited to material), the sightseeing elevator shaft shall implement Article 3.0.19 to calculate the building area according to the natural floor.
3. The content of this specification that does not calculate the building area does not mention "escalators, automatic sidewalks". The building area should be calculated for escalators and automatic sidewalks.
Escalator calculates the building area according to the natural floor according to Article 3.0.19.
When the automatic sidewalk is in a building, the building area should not be deducted from the area occupied by the automatic sidewalk.
10 Underground civil defense passage outside the building, independent chimneys, flues, trenches, oil (water) tanks, gas cabinets, water towers, oil (water) pools, storage silos, trestles and other structures.
1. This specification adjusts the language order and moves the "underground civil defense channel" to the front. Whether it is independent or connected to the building, the building area is not calculated. The original specification is easily understood as an independent underground civil defense passage.
2. Cancel the "subway tunnel". Subway tunnels are municipal projects and are very clear that they do not calculate the building area, so this code will not be mentioned anymore.
3. Independent flue belongs to structures and does not calculate the building area; however, the building area should be calculated based on the natural floor (see Article 3.0.19).
4. Independent oil storage (water) pool belongs to the structure and does not calculate the building area.
's insights on the "New Area Code"
1. The new building area specification has not curbed the stealing of area
2. The bidding control price of engineering projects compiled using international lists is not affected by the rules for calculating the building area.
3. The technical and economic indicators of engineering cost are related to the rules for calculating building area.
4. The new version of the building area calculation specification does not uniformly calculate the building area for the entire process of building engineering construction.
5. The new version of the building area calculation specification is the product of a limited combination of technology and policies.
