JP2023136818A - Building - Google Patents

Abstract

To provide a building capable of improving the comfort of an open ceiling space.SOLUTION: A building 1 is provided with a first floor 11 provided on a first story, a second floor 12 provided on a second story, a skip floor 13 provided at a position higher than the first floor 11 and lower than the second floor 12, and a first staircase 14 connecting the first floor 11 to the skip floor 13. The second floor 12 is provided so as to face an open ceiling space ST that opens from the skip floor 13 and the first staircase 14 to a ceiling 6 of the second floor, and has an overhang part 30 that is arranged so as to overlap the first staircase 14 in plan view and overhangs the open ceiling space ST. The overhang part 30 is configured to include a corner part between the wall that abuts the skip floor 13 and the edge that faces the open ceiling space ST on the second floor 12.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD This disclosure relates to buildings.

BACKGROUND ART Buildings having an atrium space are known (for example, Patent Document 1). The atrium space described in Patent Document 1 is provided in the living room. Such an atrium space can promote communication between people in the living room on the first floor and people on the second floor.

JP2016-069938A

There are cases where it is desired to make the atrium space wider due to user requests or from a design perspective. However, increasing the size of the atrium requires reinforcement of the building from the viewpoint of its strength. Such reinforcement may reduce the design of the atrium space. From this point of view, there is room for improvement in buildings with atriums.

(1) A building that solves the above problem has a first floor provided on the first floor, a second floor provided on the second floor, and a building located at a position higher than the first floor and lower than the second floor. A building comprising a skip floor and a first staircase connecting the first floor and the skip floor, wherein the second floor extends from the skip floor and the first staircase to the ceiling of the second floor. It is provided so as to face the atrium space, and has an overhanging portion, and the overhanging portion overhangs the atrium space so as to overlap with the first staircase in a plan view, and is provided to face the skip floor. It is configured to include a corner between a contacting wall and an edge facing the atrium space on the second floor.

According to this configuration, the strength of the frame structure surrounding the atrium space is improved by the overhang portion. This allows the atrium space to be expanded. Then, the overhang is placed above the first staircase. Therefore, the projecting portion does not narrow the atrium space above the skip floor. Further, the overhanging portion is less likely to be an eyesore for people using the atrium space. In this way, the comfort of the skip floor having an atrium space can be improved.

(2) In the building described in (1) above, the first floor is provided along the wall and adjacent to the skip floor via the first stairs, and the first stairs are: The skip floor is provided over half or more of the length of the skip floor in the width direction perpendicular to the wall.

According to this configuration, the first staircase between the first floor and the skip floor is provided over half or more of the length of the skip floor in the width direction, so the first staircase between the first floor and the skip floor is You can easily go back and forth.

(3) The building according to (2) above further includes a second staircase connecting the skip floor and the second floor, the second floor extending along the wall and above the first floor. The second staircase is provided on the second floor, and the second staircase is configured such that the ascending and descending direction of the second staircase is parallel to the wall, and is provided on the second floor on the opposite side of the overhang.

According to this configuration, the second staircase is provided at a location away from the overhang on the second floor. As a result, when looking down on the skip floor from the overhang, the second staircase does not become a visual hindrance, so the entire skip floor can be seen. Therefore, communication between people on the overhang and people on the skip floor can be facilitated.

(4) In the building according to any one of (1) to (3) above, the height of the floor surface of the skip floor is 1 m or more and 1.5 m or less. According to this configuration, it is possible to facilitate communication between people on the second floor and people on the skip floor.

(5) In the building according to any one of (1) to (4) above, the floor of the overhang is supported by a reinforcing member, and the reinforcing member is a first beam forming the wall. and a second beam that supports the second floor and is connected to the first beam. According to this configuration, the overhang portion is reinforced by the reinforcing member. Since the reinforcing member is provided to support the overhang, it is less likely to become an eyesore. Therefore, the framework surrounding the atrium space can be strongly reinforced by the reinforcing member without damaging the appearance of the atrium space.

(6) The building according to any one of (1) to (5) above, further comprising a roof having a first slope and a second slope connected to the first slope, The first slope part and the second slope part are configured such that the slope directions of the first slope part and the second slope part are along the wall in plan view, and the ceiling of the second floor is and the second slope, and the skip floor is provided directly below the ceiling along the first slope or the second slope through the atrium space.

The floor of the skip floor is installed at a higher position than the first floor, so if an attic is provided, the height of the atrium space of the skip floor will create a more open feeling than when the atrium space is installed from the first floor. becomes scarce. In this respect, since the ceiling of the second floor is provided along the first slope part and the second slope part, the atrium space can be raised. As a result, the open feeling of the atrium space on the skip floor can be enhanced.

(7) In the building according to any one of (1) to (6) above, the first floor is arranged so as to face a road that can access the building, and the skip floor is A window is disposed on the opposite side of the road to the first floor, and is provided at a height corresponding to the second floor in a wall surrounding the atrium space.

According to this configuration, the skip floor is located within the building at a position far from the road. In this case, if a window is provided on the first floor of the skip floor, it will be easier to see from residents of other buildings on the back side of the building. In this regard, since windows are provided at a height corresponding to the second floor in the wall surrounding the atrium space, the skip floor can be difficult to see from other buildings on the back side of the building.

The building of the present disclosure can improve the comfort of the atrium space.

It is a plan view of a building. 2 is a cross-sectional view of the building taken along line 2-2 in FIG. 1. FIG. 3 is a cross-sectional view of the building taken along line 3-3 in FIG. 2. FIG. 3 is a cross-sectional view of the building taken along line 4-4 in FIG. 2. FIG. It is a schematic diagram of the frame structure of an overhang part. It is a perspective view of the skip floor seen from the 1st floor.

<Buildings>
The building 1 will be explained with reference to FIGS. 1 to 6. Examples of the building 1 include a residence, a detached office, and a community center. In this embodiment, a house is taken as an example.

As shown in FIG. 1, in one example, the building 1 is rectangular in plan view. As shown in FIG. 2, the building 1 has an atrium space ST. As shown in FIGS. 1, 2, and 3, the building 1 includes an outer wall 2, an inner wall 3, and a roof 5. A plurality of floors are provided in an indoor space surrounded by an outer wall 2 and a roof 5.

As shown in FIG. 3, the outer wall 2 includes a first outer wall 2A, a second outer wall 2B parallel to the first outer wall 2A, a third outer wall 2C connecting the first outer wall 2A and the second outer wall 2B, and a third outer wall 2C that connects the first outer wall 2A and the second outer wall 2B. A fourth outer wall 2D parallel to the third outer wall 2C. The third outer wall 2C and the fourth outer wall 2D extend in the width direction DW. The width direction DW is defined as a direction perpendicular to the first outer wall 2A.

The distance between the first outer wall 2A and the second outer wall 2B is shorter than the distance between the third outer wall 2C and the fourth outer wall 2D. Hereinafter, in the building 1, the direction along the first outer wall 2A will be defined as the "longitudinal direction DL" of the building 1.

In the building 1, at least one of the first to fourth outer walls 2A to 2D faces the road 8. In this embodiment, the fourth outer wall 2D faces the road 8. In one example, the building 1 is arranged so that the longitudinal direction DL of the building 1 is along the north-south direction DN in plan view. The building 1 extends in the north-south direction DN. The third outer wall 2C of the building 1 faces north. The fourth outer wall 2D of the building 1 faces south.

As shown in FIGS. 3 and 4, the inner wall 3 includes a first inner wall 3A and a second inner wall 3B. The first inner wall 3A and the second inner wall 3B extend across the ceiling 6 from the first floor to the second floor. The first inner wall 3A and the second inner wall 3B are arranged parallel to the first outer wall 2A. The first inner wall 3A and the second inner wall 3B extend in the north-south direction DN. The second inner wall 3B is arranged on the south side of the first inner wall 3A.

The first inner wall 3A is orthogonal to the third outer wall 2C. The first inner wall 3A faces the skip floor 13. The second inner wall 3B is orthogonal to the fourth outer wall 2D. The second inner wall 3B faces the first floor 11 and the second floor 12.

<Roof>
The roof 5 is configured as a gable roof. The roof 5 has a first slope part 5A and a second slope part 5B connected to the first slope part 5A. The first slope portion 5A and the second slope portion 5B are configured such that the slope direction DS of the first slope portion 5A and the second slope portion 5B is along the first outer wall 2A in plan view (see FIG. 1). The ridge of the roof 5 extends in the width direction DW. In this embodiment, the first slope portion 5A is provided on the north side of the second slope portion 5B. The first slope portion 5A slopes downward toward the north. The second slope portion 5B slopes downward toward the south.

The attic directly below the roof 5 is omitted. The ceiling 6 of the second floor is provided along the first slope part 5A and the second slope part 5B.

<Building composition>
The building 1 includes a first floor 11 provided on the first floor, a second floor 12 provided on the second floor, a skip floor 13, a first staircase 14, and a second staircase 15.

<1st floor>
The first floor 11 is configured as, for example, a dining room or a living room. In one example, the first floor 11 is configured as a living room. The first floor 11 is arranged in an indoor space within the building 1 so as to face a road 8 that can access the building 1 . In this embodiment, the first floor 11 is provided so as to be in contact with the fourth outer wall 2D.

As shown in FIG. 3, the first floor 11 is provided between the first outer wall 2A and the second inner wall 3B. The first floor 11 is provided along the first outer wall 2A. The first floor 11 faces the fourth outer wall 2D. A first window 21 is provided in a portion of the fourth outer wall 2D corresponding to the first floor. Light is brought into the first floor 11 through the first window 21.

The first floor 11 is adjacent to the skip floor 13 via the first staircase 14. No partition wall is provided at the boundary between the first floor 11 and the skip floor 13. Therefore, the first space SA above the first floor 11 is continuous with the atrium space ST above the skip floor 13. The length of the first floor 11 in the width direction DW is equal to the length of the skip floor 13.

<Skip floor>
The skip floor 13 is configured, for example, as a dining room or a living room. When the first floor 11 is a living room, the skip floor 13 is configured as a dining room. The skip floor 13 may be configured as a dining kitchen. When the first floor 11 is a dining room, the skip floor 13 is configured as a living room.

In one example, the skip floor 13 is arranged on the opposite side of the road 8 with respect to the first floor 11 in the indoor space within the building 1 . In this embodiment, the skip floor 13 is provided so as to be in contact with the third outer wall 2C.

The skip floor 13 is provided between the first outer wall 2A and the first inner wall 3A. The skip floor 13 is provided so as to extend from the first outer wall 2A to the first inner wall 3A. The skip floor 13 is provided at a position higher than the first floor 11 and lower than the second floor 12. The height of the floor surface of the skip floor 13 is 1 m or more and 1.5 m or less, based on the floor surface of the first floor 11. The floor surface of the skip floor 13 is generally located at an intermediate height between the floor surface of the first floor 11 and the floor surface of the second floor 12.

The skip floor 13 is provided directly below the ceiling 6 along the first slope part 5A or the second slope part 5B of the roof 5 via the open-air space ST. In this embodiment, the skip floor 13 is provided on the north side of the first floor 11 and directly below the first sloped portion 5A of the roof 5.

A storage chamber 16 is provided below the skip floor 13. The lower space SC under the skip floor 13 is partitioned into a plurality of storage chambers 16 by several partition walls. An entrance 17 for entering and exiting the storage chamber 16 is provided in the first inner wall 3A. A sliding door is provided at the entrance 17 of the first inner wall 3A.

The skip floor 13 is provided with an atrium space ST. The atrium space ST is configured to extend from the skip floor 13 and the first staircase 14 to the ceiling 6 on the second floor (see FIG. 2).

The atrium space ST is partially surrounded by the first outer wall 2A, the first inner wall 3A, and the third outer wall 2C. The atrium space ST is open toward the first floor 11 and the second floor 12.

The atrium space ST extends upward along the first outer wall 2A and the third outer wall 2C. A second window 22 is provided at the top of the third outer wall 2C. The second window 22 of the third outer wall 2C is provided at a height corresponding to the second floor. The second window 22 is provided under the eaves of the first inclined portion 5A. Light is introduced into the skip floor 13 from a first window 21, a second window 22, and a third window 23.

As shown in FIG. 2, the skip floor 13 is configured to be spatially continuous with the first floor 11. Specifically, a partition wall or a sliding door that separates the atrium space ST of the skip floor 13 from the first space SA of the first floor 11 is not provided.

<Stairs>
The first staircase 14 connects the first floor 11 and the skip floor 13. The first staircase 14 is provided so as to form a boundary between the first floor 11 and the skip floor 13. The ascending/descending direction DE of the first staircase 14 is parallel to the first outer wall 2A. The first staircase 14 extends in the width direction DW. The first staircase 14 is provided over half or more of the length of the skip floor 13 in the width direction DW. The first staircase 14 is connected to the first outer wall 2A. The first staircase 14 is not provided with a handrail.

The second staircase 15 connects the skip floor 13 and the second floor 12. The second staircase 15 extends so that the ascending and descending direction DE of the second staircase 15 is parallel to the first outer wall 2A. The ascending/descending direction DE of the second staircase 15 is equal to the ascending/descending direction DE of the first staircase 14. The second staircase 15 is provided on the second floor 12 on the opposite side of the overhang 30.

<2nd floor>
The second floor 12 is configured as a study, a hall (also called a hall), or a children's room. The second floor 12 is provided so as to face the atrium space ST. No partition wall is provided at the boundary between the second floor 12 and the atrium space ST. Therefore, the second space SB above the second floor 12 is continuous with the atrium space ST above the skip floor 13. The length of the second floor 12 in the width direction DW is equal to the length of the skip floor 13.

As shown in FIG. 4, the second floor 12 is provided along the first outer wall 2A. The second floor 12 is provided between the first outer wall 2A and the second inner wall 3B. The second floor 12 is provided above the first floor 11. The height of the floor surface of the second floor 12 is 2.2 m or more and 3.0 m or less, based on the floor surface of the first floor 11.

The second floor 12 faces the fourth outer wall 2D. A third window 23 is provided in a portion of the fourth outer wall 2D corresponding to the second floor. Light is brought into the second floor 12 through the third window 23. The second floor 12 is provided directly below the second inclined portion 5B of the roof 5.

<Protruding part>
The second floor 12 has an overhang 30. The projecting portion 30 projects into the atrium space ST so as to overlap with the first staircase 14 in a plan view.

The overhang portion 30 is configured to include a corner portion 12B. The corner 12B is an inner corner between the first outer wall 2A in contact with the skip floor 13 and the edge 12A facing the atrium space ST on the second floor 12.

As shown in FIG. 4, in one example, the overhang portion 30 has a first edge 31 in contact with the first outer wall 2A, a boundary line 33 that is an extension of the edge 12A of the second floor 12, and a second floor The second end edge 32 extends diagonally from the end of the second end edge 12A toward the first outer wall 2A. The second edge 32 may be straight or curved. When the second edge 32 is a straight line, the projecting portion 30 has a triangular shape in plan view. In one example, the projecting portion 30 is configured to have an isosceles triangle shape in plan view. The triangular projecting portion 30 in plan view is also called an oblique floor.

In one example, the overhang 30 is wide enough for a person to stand on. The length of the boundary line 33 and the first edge 31 of the overhanging portion 30 is 1 m or more and 3 m or less. A chair may be placed on the overhang 30. A foliage plant may be placed on the overhang 30. A shelf may be placed on the overhang 30.

<Frame structure of overhang>
Referring to FIG. 5, the frame structure around the projecting portion 30 will be described. The floor of the overhang 30 is supported by a reinforcing member 40. The reinforcing member 40 not only supports the overhang portion 30 but also has a function of reinforcing the frame structure surrounding the atrium space ST.

The reinforcing member 40 is diagonally connected to a first beam 41 that constitutes the first outer wall 2A and a second beam 42 that supports the second floor 12. The second beam 42 is connected to the first beam 41. In this embodiment, the second beam 42 is connected to the first beam 41 via a column 43 that constitutes the first outer wall 2A. The second beam 42 is orthogonal to the first beam 41. The floor of the overhang 30 may be supported by a plurality of reinforcing members 40. In one example, the reinforcing member 40 is connected to the first beam 41 and the second beam 42 at 45 degrees.

The operation of this embodiment will be explained.
The thicknesses of the columns, beams, and girders that make up the building 1 are determined by standards. For this reason, when providing the rectangular atrium space ST in the building 1, there is a structural design limit to the width of the atrium space ST in the horizontal section. On the other hand, there are cases where it is desired to widen the atrium space ST due to user requests or from a design standpoint. In such a case, the atrium space ST can be expanded by reinforcing the frame structure surrounding the atrium space ST. However, depending on the method of reinforcement, there is a possibility that the usability or design of the atrium space ST may be reduced.

In this embodiment, the second floor 12 has a projecting portion 30 projecting into the atrium space ST. The overhang 30 is configured to include a corner 12B between the first outer wall 2A and the edge of the second floor 12. This reinforces the frame structure surrounding the atrium space ST, so that the atrium space ST can be expanded in the horizontal direction. By expanding the atrium space ST, the skip floor 13 provided under the atrium space ST can be enlarged, so the value of using the skip floor 13 increases.

As shown in FIG. 6, an overhang 30 is placed above the first staircase 14. Therefore, the projecting portion 30 does not narrow the atrium space ST above the skip floor 13. During activities on the skip floor 13, the overhanging portion 30 is unlikely to become an eyesore. Further, since the projecting portion 30 is provided so as to be in contact with the first outer wall 2A, it does not get in the way of ascending and descending the first staircase 14. Further, the atrium space ST is configured to extend from the skip floor 13 and the first staircase 14 to the ceiling 6 on the second floor. That is, the first staircase 14 is partially included in the atrium space ST. Therefore, it is easy to go back and forth from the first floor 11 to the skip floor 13.

The projecting portion 30 projects from the edge 12A of the second floor 12 into the atrium space ST. In this way, the overhanging portion 30 constitutes a floor portion close to the skip floor 13. Such an overhang 30 makes it easier to communicate between people on the second floor 12 and people on the skip floor 13. Moreover, the overhang part 30 has a second end edge 32 that extends diagonally from the end edge 12A facing the atrium space ST toward the first outer wall 2A. The projecting portion 30 having such a second edge 32 allows the design around the projecting portion 30 to be neatly arranged.

As described above, the overhang part 30 of the second floor 12 can provide a spacious skip floor 13 with high design around the atrium space ST, and also provide a spacious skip floor 13 between the second floor 12 and the skip floor 13. can improve the ease of communication.

The effects of this embodiment will be explained.
(1) The second floor 12 is provided so as to face the atrium space ST. The second floor 12 has a projecting portion 30 projecting into the atrium space ST. The projecting portion 30 is configured to overlap the first staircase 14 in plan view and include the corner portion 12B. The corner 12B is an inside corner between the first outer wall 2A and the edge 12A facing the atrium space ST on the second floor 12.

According to this configuration, the strength of the frame structure surrounding the atrium space ST is improved by the overhanging portion 30. This allows the atrium space ST to be expanded. Then, the overhang 30 is arranged above the first staircase 14. Therefore, the projecting portion 30 does not narrow the atrium space ST above the skip floor 13. Moreover, the overhanging portion 30 is unlikely to become an eyesore for people using the atrium space ST. In this way, the comfort of the skip floor 13 having the atrium space ST can be improved.

Moreover, according to such an overhang part 30, the atrium space ST can be expanded in the direction along the first outer wall 2A. Therefore, it is particularly effective under the following conditions. For example, in a building 1 that is rectangular in plan view and long in the direction along the first outer wall 2A, if the floor cannot be expanded in the width direction DW, the atrium space ST can be expanded along the first outer wall 2A.

(2) The first staircase 14 is provided over half or more of the length of the skip floor 13 in the width direction DW. According to this configuration, it is possible to easily move back and forth between the first floor 11 and the skip floor 13. Furthermore, since the first staircase 14 extends in the width direction DW in this way, it can be used as a space for placing books, artwork, plants, and ornaments.

In addition, the first staircase 14 may be configured to be connected to the first outer wall 2A. In this configuration, the handrail of the first staircase 14 may be provided on the first outer wall 2A. On the contrary, when the first staircase 14 is configured to be connected to the first outer wall 2A, the handrail on the first outer wall 2A side may be omitted. In this case, the end of the first staircase 14 on the first outer wall 2A side can be used as a space for placing books, artwork, plants, and ornaments.

Furthermore, the skip floor 13 and the first floor 11 may not be provided with a partition wall or a partition sliding door. With such a configuration, it is possible to reduce the number of obstacles from the first floor 11 to the skip floor 13, thereby increasing the continuity between the first floor 11 and the skip floor 13. This allows for smooth movement between the first floor 11 and the skip floor 13, and increases the sense of unity and openness between the first floor 11 and the skip floor 13. Moreover, the ventilation between the first floor 11 and the skip floor 13 is increased. In addition, the brightness of the skip floor 13 increases due to the sunlight passing through the first floor 11.

(3) The second staircase 15 is configured such that the ascending/descending direction DE of the second staircase 15 is parallel to the first outer wall 2A. The second staircase 15 is provided on the second floor 12 on the opposite side of the overhang 30.

According to this configuration, the second staircase 15 is provided at a location away from the overhang 30 on the second floor 12. Thereby, when looking down on the skip floor 13 from the overhanging part 30, the second staircase 15 does not become a visual hindrance, so the entire skip floor 13 can be seen. Therefore, communication between people on the overhang 30 and people on the skip floor 13 can be facilitated.

(4) The height of the floor surface of the skip floor 13 is 1 m or more and 1.5 m or less. According to this configuration, it is possible to facilitate communication between people on the second floor 12 and people on the skip floor 13.

(5) The floor of the overhang 30 is supported by the reinforcing member 40. The reinforcing member 40 is diagonally connected to a first beam 41 that constitutes the first outer wall 2A and a second beam 42 that supports the second floor 12 and is connected to the first beam 41. According to this configuration, the overhang portion 30 is reinforced by the reinforcing member 40. Since the reinforcing member 40 is provided to support the overhang portion 30, it is less likely to become an eyesore. Therefore, the frame structure surrounding the atrium space ST can be strongly reinforced by the reinforcing member 40 without damaging the appearance of the atrium space ST.

(6) The ceiling 6 of the second floor is provided along the first slope 5A and the second slope 5B of the roof 5. The skip floor 13 is provided directly below the ceiling 6 along the first slope portion 5A or the second slope portion 5B via the atrium space ST.

Since the floor of the skip floor 13 is provided at a higher position than the first floor 11, when an attic is provided, the height of the atrium space ST of the skip floor 13 is such that the atrium space ST is provided from the first floor 11. The sense of openness will be less than in the case. In this regard, since the ceiling 6 on the second floor is provided along the first slope part 5A and the second slope part 5B, the atrium space ST can be raised. Thereby, the open feeling of the open-air space ST in the skip floor 13 can be enhanced.

(7) The first floor 11 is arranged to face the road 8. The skip floor 13 is arranged on the opposite side of the road 8 with respect to the first floor 11. A second window 22 is provided in the outer wall 2 surrounding the atrium space ST at a height corresponding to the second floor.

According to this configuration, the skip floor 13 is placed in the building 1 at a position far from the road 8. In this case, if a window is provided on the first floor of the skip floor 13, it will be easier to see from residents of other buildings 1 on the back side of the building 1. In this regard, since the second window 22 is provided at a height corresponding to the second floor in the outer wall 2 surrounding the atrium space ST, the skip floor 13 can be made difficult to see from other buildings 1 on the back side of the building 1.

(8) The building 1 may be configured to have a rectangular shape in plan view. The building 1 may be arranged such that the longitudinal direction DL of the building 1 is along the north-south direction DN. In this case, the skip floor 13 is arranged on the north side of the first floor 11 and the second floor 12. The first floor 11 is configured as an open floor with respect to the skip floor 13. The second floor 12 is configured as an open floor with respect to the skip floor 13. Furthermore, in the outer wall 2 of the building 1, a second window 22 is provided in the third outer wall 2C on the north side at a position corresponding to the second floor. In the fourth outer wall 2D on the south side, a first window 21 is provided at a position corresponding to the first floor, and a third window 23 is provided at a position corresponding to the second floor. With such a configuration, the ventilation and lighting of the atrium space ST can be improved.

<Modified example>
The above embodiment is an example of the form that the building 1 can take, and is not intended to limit the form. The building 1 may take a different form from the form illustrated in the above embodiment. An example of this is a configuration in which a part of the configuration of the embodiment is replaced, changed, or omitted, or a configuration in which a new configuration is added to the embodiment. Modifications of the embodiment are shown below.

In this embodiment, the projecting portion 30 may partially overlap the skip floor 13 in plan view. The projecting portion 30 may partially overlap the first floor 11 in a plan view.

In this embodiment, the overhang portion 30 is configured to include a corner portion 12B. On the other hand, the projecting portion 30 may be configured to include a corner on the opposite side to the corner 12B. The corner on the opposite side to the corner 12B is an inside corner between the first inner wall 3A in contact with the skip floor 13 and the edge 12A facing the atrium space ST on the second floor 12. In this case, the second staircase 15 is arranged along the first outer wall 2A on the skip floor 13.

In this embodiment, the second floor 12 may have two overhangs 30. The first projecting portion 30 is configured to include the corner portion 12B, as in the present embodiment. The second overhang 30 is configured to include a corner on the opposite side of the corner 12B. According to this configuration, the atrium space ST can be further expanded.

In this embodiment, instead of the second staircase 15, a third staircase that directly extends from the first floor 11 to the second floor 12 may be provided. For example, the third staircase is provided adjacent to the first floor 11. In this case, the atrium space ST can be used more widely.

DE...Elevating direction, DS...Inclination direction, DW...Width direction, ST...Atrium space, 1...Building, 5...Roof, 5A...First slope, 5B...Second slope, 6...Ceiling, 8...Road , 11...first floor, 12...second floor, 12A...edge, 12B...corner, 13...skip floor, 14...first staircase, 15...second staircase, 30...overhang, 40...reinforcement member , 41...first beam, 42...second beam.

Claims (7)

A first floor provided on the first floor, a second floor provided on the second floor, a skip floor provided at a position higher than the first floor and lower than the second floor, the first floor and the skip floor. A building comprising: a first staircase connecting the
The second floor is provided so as to face an atrium space that extends from the skip floor and the first staircase to the ceiling of the second floor, and has an overhang,
The overhang extends into the atrium space so as to overlap with the first staircase in a plan view, and is between a wall in contact with the skip floor and an edge facing the atrium space on the second floor. configured to include the corners of the
Building. The first floor is provided along the wall and adjacent to the skip floor via the first staircase,
The first staircase is provided over half or more of the length of the skip floor in the width direction perpendicular to the wall.
The building according to claim 1. Furthermore, a second staircase connecting the skip floor and the second floor is provided,
The second floor is provided along the wall and above the first floor,
The second staircase is configured such that the ascending and descending direction of the second staircase is parallel to the wall, and is provided on the second floor on the opposite side of the overhang.
The building according to claim 2. The height of the floor surface of the skip floor is 1 m or more and 1.5 m or less,
The building according to any one of claims 1 to 3. The floor of the overhang is supported by a reinforcing member,
The reinforcing member is diagonally connected to a first beam forming the wall and a second beam supporting the second floor and connected to the first beam.
The building according to any one of claims 1 to 4. Furthermore, a roof having a first slope part and a second slope part connected to the first slope part,
The first slope portion and the second slope portion are configured such that the slope directions of the first slope portion and the second slope portion are along the wall in a plan view,
The ceiling of the second floor is provided along the first slope and the second slope,
The skip floor is provided directly below the ceiling along the first slope or the second slope through the atrium space.
The building according to any one of claims 1 to 5. The first floor is arranged so as to face a road that can access the building,
The skip floor is located on the opposite side of the road with respect to the first floor,
A window is provided at a height corresponding to the second floor in the wall surrounding the atrium space,
The building according to any one of claims 1 to 6.

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