JP2016044418A - Foundation airtight structure for building, and building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foundation airtight structure for a building in which exterior pillars of the building are arranged so as to prevent an airtight line from being discontinued, and to provide the building.SOLUTION: A foundation airtight structure is provided, in which, between an exterior pillar 22 and an exterior pillar 22 arranged next to each other in a building 14, a sealer 70 arranged between a lower flange 26B of a floor girder 26 and an upper end face 12A of a foundation 12, is provided so as to stretch around an exterior surface 22A of the exterior pillar 22 at a peripheral part the exterior pillar 22. By this, the sealer 70 can be continuously arranged over the entire periphery of the building 14, and thereby an airtight line can be secured over the entire periphery of the building 14.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a basic airtight structure of a building and a building.

  For example, in the invention described in Patent Document 1, packing is sandwiched between a foundation of a building and a base (floor beam), a foundation and a wall surface material (outer wall), and thereby an airtight line is formed on the foundation. The technology of forming is disclosed.

JP 2003-247282 A

  However, in this prior art, there is no suggestion about the airtight structure in the column (outer pillar) portion arranged outside in the building, so-called an airtight line for ensuring airtightness between the building and the foundation. May be interrupted at the pillar.

  In view of the above facts, the present invention has an object to obtain a basic airtight structure of a building and a building in which an airtight line is not interrupted in an outer column of the building.

  The basic airtight structure of a building according to the invention described in claim 1 is provided along the entire circumference of the building, a foundation that supports the building, and an outside that is placed on the foundation and arranged on the outer periphery of the building A column and an airtight material disposed between the outer columns adjacent to each other and around the outer surface of the outer column and disposed between the building and the foundation.

  In the basic airtight structure of the building according to the first aspect of the present invention, a foundation is provided along the entire circumference of the building, and an outer column disposed on the outer periphery of the building is placed on the foundation. Here, between the building and the foundation, an airtight material is disposed around the outer surface of the outer column and disposed between the adjacent outer columns.

  In general, a floor girder is arranged between columns that are adjacent to each other, but since a gap is provided between the floor girder and the foundation, it is not possible to arrange an airtight material. Easy. On the other hand, since the column portion is placed on the foundation, it is difficult to dispose an airtight material. For this reason, a so-called airtight line may be interrupted in the column portion.

  However, according to the present invention, since the airtight material is disposed around the outer surface of the outer pillar of the building, the airtight material can be continuously disposed over the entire circumference of the building. That is, an airtight line can be secured over the entire circumference of the building, and the intrusion of outside air can be blocked from the gap between the building and the foundation.

  The basic airtight structure of a building according to the invention described in claim 2 is the basic airtight structure of the building according to claim 1, wherein the space between the adjacent outer pillars is between the building and the foundation. Is provided with a heat insulating material on the foundation for insulating between the outside and the inside of the building.

  In the basic airtight structure of a building according to the invention described in claim 2, a heat insulating material on the foundation is provided between the building and the foundation between the adjacent outer pillars, and the building is coupled with the airtight effect of the airtight material. The heat insulation effect can be improved.

  The basic airtight structure of the building according to the invention described in claim 3 is the basic airtight structure of the building according to claim 1 or 2, in which the building is surrounded by the outer column of the airtight material. It is set in the outer wall so as to come into contact with the heat insulating material in the outer wall that insulates between the outside and the inside of the building.

  In the basic airtight structure of the building according to the invention described in claim 3, the airtight material is in contact with the heat insulating material in the outer wall provided in the outer wall around the outer pillar. Since at least a heat insulation effect can be obtained by providing the airtight material, a heat insulation line can be secured in the height direction of the building by bringing the airtight material and the heat insulating material in the outer wall into contact with each other around the outer pillar.

  The basic airtight structure of a building according to the invention described in claim 4 is the basic airtight structure of the building according to claim 2, wherein the heat insulating material on the foundation is disposed outside the building of the airtight material. .

  In the basic airtight structure of the building according to the invention described in claim 4, the heat insulating property is secured between the inside and the outside of the building by the heat insulating material on the foundation, and is disposed inside the heat insulating material on the basic material. By securing the airtightness with the airtight material, the heat insulating effect of the building can be further improved.

  The basic airtight structure of a building according to the invention described in claim 5 is the basic airtight structure of the building according to any one of claims 1 to 4, wherein a lower end portion of the outer column is provided on the foundation. The hermetic material is disposed around the outer surface of the connected base plate.

  In the basic airtight structure of the building according to the invention described in claim 5, the base is provided with an outer pillar base plate to which the lower end portion of the outer pillar is connected. A material is disposed. In other words, the airtight material can be disposed on the outer column pace plate in a state where the position of the airtight material is set by the outer column base plate, so that the airtight material can be disposed on the outer column pace plate. .

  The basic airtight structure of a building according to the invention described in claim 6 is the basic airtight structure of the building according to claim 5, wherein a corner portion is formed inside the building in the outer pillar base plate, and is close to the corner portion. A hooked portion around which the airtight material is wound is provided at a position where the airtight material is to be pulled.

  In the basic airtight structure of the building according to the invention described in claim 6, since the corner portion is formed inside the building in the base plate for the outer pillar and the hooked portion is provided at a position close to the corner portion, In a state where the airtight material is disposed around the outer surface of the column base plate, the airtight material can be easily disposed by hooking the airtight material on the hooked portion.

  The building according to the invention described in claim 7 is applied with the basic airtight structure of the building described in any one of claims 1 to 6.

  In the building according to the invention described in claim 7, by applying the basic airtight structure in the present invention to the foundation of the building, it is possible to ensure airtightness with the foundation along the entire circumference of the building. it can.

  As described above, the basic airtight structure of the building according to the present invention according to claim 1 has an excellent effect that the airtight line can be prevented from being interrupted in the outer column of the building.

  The basic airtight structure of a building according to the present invention according to claim 2 has an excellent effect that the heat insulating effect of the building can be improved.

  The basic airtight structure of a building according to the present invention according to claim 3 has an excellent effect that a heat insulation line can be secured in the height direction of the building.

  The basic airtight structure of a building according to the present invention according to claim 4 has an excellent effect that the heat insulating effect of the building can be further improved.

  In the basic airtight structure of the building according to the present invention as set forth in claim 5, when the airtight material is disposed around the outer surface of the outer column, no extra cost is generated by using the base plate for the outer column. It has the outstanding effect that it can be made.

  In the basic airtight structure of the building according to the sixth aspect of the present invention, the airtight material can be positioned by the outer pillar base plate and the hooked portion when the airtight material is disposed between the building and the foundation. Therefore, it has an excellent effect that workability is improved.

  The building according to the present invention described in claim 7 improves the airtightness between the building and the foundation by preventing the airtight line from being interrupted in the outer column of the building, and as a result, improves the heat insulating effect of the building. It has an excellent effect of being able to.

It is a top view which shows the basic airtight structure which concerns on this Embodiment. It is sectional drawing which shows the state cut | disconnected along 2-2 line in FIG. It is sectional drawing which shows the state cut | disconnected along 3-3 line in FIG. It is a top view which shows the basic airtight structure which concerns on this Embodiment. It is an enlarged plan view which expands and shows the area | region of A in FIG.

  Hereinafter, an embodiment of a building according to the present invention will be described with reference to the drawings.

(Structure of the basic airtight structure of the building)
1 and 4 show plan views of the foundation 12. Since the building 14 is fixed on the foundation 12, in FIG. 1, a part of the building unit 16 and the half unit 18 constituting the building 14 are indicated by a two-dot chain line. 2 and 3, the building 14 is shown by a solid line for convenience of explanation.

  The principal part expanded sectional view which shows the 1st floor part of the foundation 12 to which the foundation airtight structure 10 of the building which concerns on this embodiment was applied, and the building 14 fixed on the foundation 12 is shown by FIG. As an example of the building 14, a unit building is employed in the present embodiment. For example, the building 14 includes two building units 16 and a short side of the building unit 16 as illustrated in FIG. 1. The two half units 18 halved in the direction are connected to each other.

  Although not shown, the building unit 16 has a rectangular parallelepiped shape, and pillars 20 (20A, 20B, 20C, 20D) are disposed at the four corners of the building unit 16. Here, the pillars 20 </ b> A, 20 </ b> B, and 20 </ b> C are disposed on the outer periphery of the building 14, and the pillar 20 </ b> D is disposed on the inside 17 of the building 14. For this reason, the pillars corresponding to the outer pillars in the present invention refer to the pillars 20A, 20B, and 20C, and these pillars may be described as the outer pillars 22 in the following. Further, the column 20D may be described as the inner column 24 corresponding to the outer column.

  The upper ends of the columns 20 of the building unit 16 are connected by four ceiling beams (not shown), and the lower ends of the columns 20 are connected by four floor beams 26. The column 20 is formed of square tubular square steel in plan view, and the ceiling beam and floor beam 26 are grooved steel having a U-shaped cross-section when cut along the height direction of the building 14. Is formed.

  As shown in FIG. 3, the floor girder 26 includes an upper flange 26A, a lower flange 26B, and a web 26C that connects the lower flange 26B and the upper flange 26A. The U-shaped openings formed by these are arranged inward in the horizontal direction of the building unit 16.

  On the other hand, as shown in FIG. 1, the configuration of the half unit 18 is substantially the same as that of the building unit 16, and therefore will be briefly described. The upper end of each column 28 is connected by four ceiling beams (not shown), and the lower end of each column 28 is connected by four. Here, the pillars corresponding to the outer pillars in the present invention refer to the pillars 28A, 28B, and 28C. Hereinafter, these pillars may be described as the outer pillars 32 in the same manner as the building unit 16, and the pillars 28D. May be described as the inner pillar 34.

  The building unit 16 and the half unit 18 as described above are fixed on the foundation 12. As shown in FIG. 3, the foundation 12 is formed of a reinforced concrete cloth foundation, and includes a footing portion 36 embedded in the floor base plate 19 and a rising portion 38 extending upward. It is configured.

  An outer heat insulating material 40 is provided on the outer surface of the rising portion 38, and an inner heat insulating material 42 is provided on the inner surface of the rising portion 38. The upper end surface 40A of the outer heat insulating material 40 and the upper end surface 42A of the inner heat insulating material 42 are set to be substantially flush with the upper end surface of the rising portion 38 (the upper end surface 12A of the foundation 12). A moistureproof sheet 44 is applied to the outer surface of the outer heat insulating material 40.

  As shown in FIG. 1, the foundation 12 is continuously provided along the entire circumference of the building 14, and the inner space surrounded by the foundation 12 is an underfloor space 46. In the underfloor space 46, pillar support foundations 48 are provided corresponding to the installation positions of the inner pillar 24 of the building unit 16 and the inner pillar 34 of the half unit 18.

  The pillar 20 of the building unit 16 and the pillar 28 of the half unit 18 are base plates 50 and 52 as outer pillar base plates fixed to the upper end surface 12A of the foundation 12 (the upper end surface of the rising portion 38) by the floor beams 26, and the columns. Each is fixed to a base plate 54 fixed to the upper end surface 48A of the receiving base 48. That is, the column 20 of the building unit 16 and the column 28 of the half unit 18 are placed on the upper end surface 12A of the foundation 12 via the outer column base plate.

  The outer shape of the base plate 50 is set to be substantially the same as or slightly larger than the outer shape of the outer columns 22 and 32, and the base plate 54 is substantially the same as or slightly larger than the outer shape of the inner columns 24 and 34. The outer shape is set as follows. On the other hand, since the base plate 52 is set so that the outer column 22 of the building unit 16 and the outer column 32 of the half unit 18 can be placed, the outer column 22 and the outer column are at least formed on the outer columns 22 and 32. The outer shape is set so as to be a size obtained by adding the gap between the two.

  As shown in FIG. 3, outer walls 56 constituting parts of the building unit 16 and the half unit 18 are respectively provided on the outer periphery of the building unit 16 and the half unit 18. This outer wall 56 is an outer wall inner heat insulation provided between an outer wall panel 58 provided on the outside (outdoor) 15 side of the building 14 and an inner wall panel (not shown) that partitions the inside (indoor) 17 of the building 14. The material 64 is comprised.

  The outer wall panel 58 includes an outer wall material 60 that forms the outer wall surface of the building unit 16 and the half unit 18, and a base material 62 provided on the back side of the outer wall material 60. The outer wall inner heat insulating material 64 is made of glass wool and is provided on the inner wall panel side of the outer wall 56. By providing the outer wall heat insulating material 64 in the outer wall 56, heat insulation is secured between the outer wall 56 and the outside 15 of the building 14.

  A draining member 66 made of metal or resin is fixed to the lower end side outside the outer wall panel 58 along the height direction of the building 14 so as to face the outer wall panel 58. It is provided over the entire circumference of the building 14. The lower end portion of the draining member 66 is set to be lower than the upper end surface 12 </ b> A of the foundation 12, and suppresses the entry of water into the underfloor space 46.

  Further, a metal mesh member 68 is disposed on the back side of the draining member 66, and the metal mesh member 68 is fixed to the base material 62, whereby the lower end portion of the base material 62 and the upper end surface 12A of the foundation 12 are connected. The gap between them is blocked. As a result, it is possible to prevent soot and the like from entering the underfloor space 46.

  Here, in this embodiment, between the building unit 16 and the half unit 18 (see FIG. 1) and the upper end surface 12A of the foundation 12, for example, as an airtight material made of a rubber member mainly composed of EPDM rubber. A sealer 70 is provided. The half unit 18 has substantially the same contents as the building unit 16 and will not be described here.

  As shown in FIGS. 1 and 4, the sealer 70 is disposed on the inner side (inner side of the building) of the foundation 12 between the outer column 22 and the outer column 22 adjacent to each other in the building unit 16. That is, the sealer 70 is disposed in a compressed state between the lower flange 26 </ b> B of the floor girder 26 and the upper end surface 12 </ b> A of the foundation 12. On the other hand, around the outer column 22, the sealer 70 is disposed around the outer surface 22 </ b> A (see FIG. 5) of the outer column 22, and the sealer 70 is disposed outside the foundation 12.

  Specifically, as shown in FIG. 5, the base plate 50 is provided on the upper end surface 12 </ b> A of the base 12, but the sealer 70 is arranged around the base plate 50 so as to be hooked on the end surface 50 </ b> A of the base plate 50. Established. An anchor bolt 74 as a hooked portion is provided on the upper end surface 12A of the foundation 12 at a position close to the inner corner portion 50B of the base plate 50 located inside the building 14. The sealer 70 is wound around the upper end portion 74A of the anchor bolt 74. Although the base plate 50 has been described here, the base plate 52 is substantially the same as the base plate 50.

  The sealer 70 is disposed in a state in which the entire circumference of the foundation 12 is continuous on the upper end surface 12A of the foundation 12. The dimension in the height direction of the sealer 70 is set to be higher than the plate thickness of the base plate 50, and as shown in FIG. 2, the outer column 22 (see FIG. 5) is joined to the base plate 50. In this state, the sealer 70 is arranged around the outer surface 22A of the outer pillar 22. The upper part of the sealer 70 located around the outer pillar 22 is in contact with the outer wall heat insulating material 64 provided on the inner wall panel (not shown) side of the outer wall 56.

  Further, as shown in FIGS. 1 and 5, a base heat insulating material 76 made of glass wool is disposed outside the sealer 70 between the outer column 22 and the outer column 22 in the building unit 16. As shown in FIGS. 3 and 5, the inner portion 76 </ b> A of the foundation heat insulating material 76 is disposed between the lower flange 26 </ b> B of the floor girder 26 and the upper end surface 12 </ b> A of the foundation 12 in a compressed state. Has been. On the other hand, the outer side portion 76B of the foundation heat insulating material 76 is located outside the lower flange 26B of the floor girder 26, is arranged in an uncompressed state, and is provided between the outer wall panel 58 and an inner wall panel (not shown). It is in contact with the outer wall heat insulating material 64.

(Operation and effect of the building's basic airtight structure)
Next, the operation and effect of the basic airtight structure of the building according to the present embodiment will be described.

  As shown in FIG. 1, in the present embodiment, between the outer column 22 and the outer column 22 adjacent to each other in the building 14, the floor 14 is disposed between the lower flange 26 </ b> B and the upper end surface 12 </ b> A of the foundation 12. The sealed sealer 70 is disposed around the outer column 22 so as to go around the outer surface 22A (see FIG. 5) of the outer column 22.

  Here, as shown in FIG. 2, since a gap is provided between the floor girder 26 and the foundation 12, it is easy to dispose the sealer 70. On the other hand, as shown in FIG. 2, since the outer column 22 is placed on the foundation 12 via the base plate 50, it is difficult to dispose the sealer 70 on the outer column 22.

  For this reason, a so-called airtight line may be interrupted in the outer pillar 22. However, in the present embodiment, as shown in FIG. 5, the sealer 70 is disposed around the outer surface 22 </ b> A of the outer pillar 22, so that the sealer 70 is attached to the entire building 14 as shown in FIG. 4. It becomes possible to arrange continuously over the circumference.

  That is, according to this embodiment, an airtight line can be secured over the entire circumference of the building 14, and intrusion of outside air can be blocked from the gap between the building 14 and the foundation 12. Thus, by improving the airtightness of the building 14, a gap can be eliminated between the building 14 and the foundation 12.

  Further, by preventing air from entering and exiting from the gap, it is possible not only to improve heat insulation, but also to prevent the outside air from entering the outer wall and causing condensation. Further, by improving the airtightness of the building 14, it is possible to eliminate a temperature unevenness in the room and obtain a comfortable space with a uniform temperature. Thereby, heating / cooling load can be reduced and energy saving measures can be taken.

  Here, the configuration in the present embodiment will be specifically described. As shown in FIG. 1, a sealer is provided on the inner side (inside the building) of the foundation 12 between the outer pillars 22 and 22 adjacent to each other in the building 14. As shown in FIG. 2, the sealer 70 is disposed in a compressed state between the lower flange 26 </ b> B of the floor girder 26 and the upper end surface 12 </ b> A of the foundation 12. On the other hand, as shown in FIG. 5, around the outer column 22, the sealer 70 is disposed around the outer surface 22 </ b> A of the outer column 22, and the sealer 70 is disposed outside the foundation 12. (Described later). In this way, an airtight line is secured over the entire circumference of the building 14.

  As shown in FIG. 2, the sealer 70 around the outer pillar 22 is in contact with the outer wall heat insulating material 64 provided in the outer wall 56. Although the heat insulation is ensured between the interior 17 and the exterior 15 of the building 14 by the outer wall heat insulating material 64, at least a heat insulating effect can be obtained by providing the sealer 70. By bringing the sealer 70 and the outer wall heat insulating material 64 into contact with each other, a heat insulating line can be secured in the height direction of the building 14.

  Further, as shown in FIG. 1, a heat insulating material 76 on the foundation is disposed outside the sealer 70 between the outer pillars 22 adjacent to each other. By ensuring the airtightness by the sealer 70 disposed inside the foundation heat insulating material 76 in a state in which the heat insulation is ensured between the inside 17 and the outside 15 of the building 14 by the foundation heat insulating material 76. Moreover, the heat insulation effect of the building 14 can be further improved.

  Here, as shown in FIG. 3, the inner portion 76 </ b> A of the foundation heat insulating material 76 is disposed between the lower flange 26 </ b> B of the floor girder 26 and the upper end surface 12 </ b> A of the foundation 12 in a compressed state. Has been. On the other hand, since the outer portion 76B of the foundation heat insulating material 76 is disposed outside the lower flange 26B of the floor beam 26, it is disposed in an uncompressed state between the outer wall panel 58 and an inner wall panel (not shown). It is in contact with the outer wall inner heat insulating material 64 provided in the outer wall. Thereby, a heat insulation line can be secured in the height direction of the building 14.

  That is, by restricting the position of the inner portion 76A of the foundation heat insulating material 76 by the sealer 70, a volume that is not compressed by the foundation heat insulating material 76 in the outer portion 76B of the foundation heat insulating material 76 is secured. Line continuity is guaranteed. In addition, the outer side heat insulating material 40 and the outer wall inner heat insulating material 64 are connected via the upper heat insulating material 76 by wrapping the outer portion 76B of the upper heat insulating material 76 with at least a part of the upper end portion 40A of the outer heat insulating material 40. It is possible to ensure the continuity of the heat insulation line.

  By the way, in this embodiment, as shown in FIG. 5, the sealer 70 is disposed around the outer pillar 22 around the outer surface 22 </ b> A of the outer pillar 22. The sealer 70 is disposed around the base plate 50 so as to be hooked on the end surface 50A of the base plate 50 provided on the upper end surface 12A of the twelve.

  Thus, since the sealer 70 can be disposed around the outer surface 22A of the outer column 22 on the base plate 50 in a state where the position of the sealer 70 is set by the base plate 50, the workability is good. Further, when the sealer 70 is disposed around the outer surface 22A of the outer pillar 22, the use of the base plate 50 can prevent extra costs.

  Further, the sealer 70 hooked on the end surface 50A of the base plate 50 is wound around the upper end portion 74A of the anchor bolt 74 provided at a position close to the inner corner portion 50B of the base plate 50 on the upper end surface 12A of the foundation 12. It has become. Thus, since the sealer 70 can be positioned on the foundation 12 by the base plate 50 and the anchor bolt 74, workability is improved.

  In addition, as shown in FIG. 1, the sealer 70 is disposed on the inner side of the foundation 12 between the outer pillars 22 and 22 adjacent to each other in the building unit 16. The sealer 70 is disposed around the outer surface 22 </ b> A of the column 22 and is disposed outside the foundation 12.

  By hooking the sealer 70 with the anchor bolt 74 and the base plate 50, a predetermined tension is applied to the sealer 70, and loosening when the sealer 70 is disposed can be suppressed. Furthermore, when an adhesive or the like is used to dispose the sealer 70 on the foundation 12, the cost can be reduced by reducing the amount of the adhesive.

(Supplement of this embodiment)
In the present embodiment, as shown in FIG. 3, the upper portion of the sealer 70 located around the outer pillar 22 is in contact with the outer wall inner heat insulating material 64 provided in the outer wall 56. It is not always necessary to contact the heat insulating material 64 in the outer wall.

  In the present embodiment, the foundation heat insulating material 76 is disposed outside the sealer 70. However, the sealer 70 may be disposed outside the foundation heat insulating material 76.

  Furthermore, in this embodiment, the base plate 50 has a rectangular shape, but the shape of the base plate 50 is not limited to this.

  In the present embodiment, the anchor bolt 74 is described as an example of the hooked portion. However, the anchor bolt 74 is not necessarily required because the sealer 70 may be hooked.

  Furthermore, in this embodiment, the cloth foundation is applied as the foundation of the building 14, but it goes without saying that a solid foundation may be applied.

  Moreover, although this embodiment demonstrated the example applied to a unit type building, this invention is applied also to buildings of other structures, such as the building constructed | assembled by the steel frame construction method, the building constructed | assembled by the conventional wooden construction method, etc. May be applied.

  As described above, the present invention has been described with reference to one embodiment. However, the present invention is not limited to the embodiment, and the above-described embodiments are within the scope of the present invention. Various modifications and substitutions can be made to the embodiment.

10 Foundation airtight structure 12 Foundation 12A Upper end surface 14 Building 15 Outside (outside of building)
17 Interior (inside the building)
20A pillar (outer pillar)
20B pillar (outer pillar)
20C pillar (outer pillar)
22 outer pillar 22A outer surface 26 floor girder 28A pillar (outer pillar)
28B pillar (outer pillar)
28C pillar (outer pillar)
32 outer column 50 base plate (base plate for outer column)
50B Inner corner (corner)
52 Base plate (base plate for outer column)
56 Outer wall 64 Heat insulation material in outer wall 70 Sealer (airtight material)
74 Anchor bolt (hooked part)
76 Thermal insulation on foundation

Claims (7)

A foundation provided along the entire circumference of the building and supporting the building;
An outer pillar placed on the foundation and arranged on the outer periphery of the building;
An airtight material disposed between the outer pillars adjacent to each other and around the outer surface of the outer pillar and disposed between the building and the foundation;
The basic airtight structure of buildings.   2. The building foundation airtightness according to claim 1, wherein a base heat insulating material is provided between the outer pillars adjacent to each other between the building and the foundation to insulate between the outside and the inside of the building. Construction.   The surroundings of the said outer pillar in the said airtight material are set so that it may contact with the heat insulating material in an outer wall provided in the outer wall of the said building, and thermally insulating between the exterior and the inside of the said building. 2. Basic airtight structure of the building described in 2.   The building base airtight structure according to claim 2, wherein the foundation heat insulating material is disposed outside the building of the airtight material.   The building according to any one of claims 1 to 4, wherein the hermetic material is disposed around an outer surface of a base plate for an outer column provided on the foundation and connected to a lower end portion of the outer column. Basic airtight structure.   The building foundation according to claim 5, wherein a corner portion is formed inside the building in the outer pillar base plate, and a hooked portion around which the airtight material is hung is provided at a position close to the corner portion. Airtight structure.   A building to which the basic airtight structure of a building according to any one of claims 1 to 6 is applied.

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