JP2016216910A - Building structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a building structure capable of securing a certain wall part on the side below a through-hole formed in a wall, while making an up-grade of piping small.SOLUTION: A building structure of the present invention includes: a top surface 1f of a first slab 1; a top surface 2f of a second slab 2 lower than the top surface 1f of the first slab; a wall 4 that is formed on the top surface 2f of the second slab; and a siphon drain pipe 20 that penetrates the wall 4a through the through-hole 4a formed in the wall 4. A height from the top surface 2f of the second slab at a lower end of the through-hole 4a is 30 mm or more.SELECTED DRAWING: Figure 2

Description

  The present invention mainly relates to a building structure in an apartment house such as a reinforced concrete structure.

  As an example of a conventional construction method mainly in a reinforced concrete apartment house, as shown in FIG. 5, a living room in which a drainage stack 10 is partitioned by a wall 4 (residence, office work, work, assembly, entertainment and other similar purposes) This is the same as the room used continuously for the purpose. In this construction method, in order to discharge the drainage from the watering devices 30a to 30c to the drainage stack 10, respectively, the pipes 40a to 40c as a part of the piping are provided with a gradient and the pipes 40a to 40c are respectively walled. 4 is penetrated.

  Moreover, as a drainage system for a watering device, a siphon drainage system that drains water using siphon force is known (see, for example, Patent Document 1).

JP 2007-315036 A

  In the siphon drainage system, a siphon drainage pipe capable of draining with a small diameter with almost no gradient can be arranged on the upper surface of the slab. For this reason, it is effective when lowering the floor height or expanding the space in the height direction of the living room.

  However, when it is adopted in the conventional building structure shown in FIG. 5, it is necessary to penetrate a part of the siphon drain pipe through the through hole (lateral hole) 4a ′ formed in the wall 4 in the same manner as the pipe body 40a. In this case, there are the following problems.

  For example, as shown in FIG. 6, when the living room part and the outdoor part are partitioned by the wall 4, the outside part of the room opposite to the living room part across the wall 4 is outdoors, so that the upper surface of the slab 50 is waterproof. It is necessary to take measures (waterproofing with urethane, etc.) and raise the end portion 60a of the waterproof measure portion 60 along the side surface of the wall 4. In this case, the through hole 4 a ′ formed in the wall 4 needs to be formed at a position higher than the end portion 60 a of the waterproof measure part 60 so as not to interfere with the waterproof measure part 60.

  When the wall 4 is a so-called conventional RC wall, it may be necessary to reinforce the wall 4 by inserting an opening reinforcing bar around the through hole 4a ′ of the wall 4. In this case, it is necessary to form the through-hole 4a ′ at a position higher than the upper surface 50f of the slab 50 in order to secure a space for inserting the opening reinforcing bars in the wall portion below the through-hole 4a ′ of the wall 4. Further, when the wall 4 is a PC wall such as ALC, it is necessary to fix the wall 4 to the slab 50, so that the fixture is attached to the wall portion below the through hole 4a ′ of the wall 4. It is necessary to secure the space. Also in this case, it is necessary to form the through hole 4a 'at a position higher than the fixture.

  However, as described above, when the through-hole is formed at a position higher than the upper surface 50f of the slab 50, there is a problem that a part of the pipe has an ascending slope and the siphon drainage capacity is deteriorated.

  The subject of this invention is providing the novel building structure which can ensure a fixed wall part below the through-hole formed in the wall, suppressing the climb gradient of piping small.

The building structure according to the present invention includes a first slab, a second slab having an upper surface at a position lower than the upper surface of the first slab, a wall formed on the upper surface of the second slab, and the wall A siphon drain pipe penetrating the wall through the formed through-hole,
The height of the lower end of the through hole from the upper surface of the second slab is 30 mm or more.
According to the building structure according to the present invention, it is possible to keep the climbing slope of the pipe small while securing a certain wall portion below the through hole formed in the wall.

In the building structure according to the present invention, the height of the central axis of the through hole from the upper surface of the first slab is preferably 0 mm or more.
In this case, the wall portion can be more sufficiently secured below the through hole formed in the wall.

In the building structure according to the present invention, the height of the lower end of the through hole from the upper surface of the first slab is preferably 50 mm or less.
In this case, the climbing gradient of the piping can be kept small.

In the building structure according to the present invention, the drain trap of the watering device connected to the upstream side of the siphon drain pipe is an upper surface of the first slab as viewed from above the upper surface of the first slab. It is preferable to be installed above.
In this case, by expanding the area of the first slab by minimizing the area of the second slab in the living room, the expansion of the area of the second slab in which the ceiling height falls in the living room can be suppressed. In the present invention, the meaning of the “drainage trap of a watering device connected to the upstream side of the siphon drainage pipe” means that the drainage trap is directly connected to the upstream side of the siphon drainage pipe. The case where other members, such as a storage tank, are interposed between the pipe and the siphon drain pipe is also included.

In the building structure according to the present invention, the wall is preferably installed on the upper surface of the second slab at a distance from an end of the first slab facing the wall.
In this case, for example, in the case of an RC wall, it is easy to insert an opening reinforcing bar, and in the case of a PC wall such as ALC, a space for fixing a wall fixture can be secured on both wall surfaces of the wall.

  ADVANTAGE OF THE INVENTION According to this invention, the novel building structure which can ensure a fixed wall part below the through-hole formed in the wall can be provided, suppressing the climbing slope of piping small.

It is a figure showing typically a building structure concerning one embodiment of the present invention as a partial section. It is a principal part enlarged view of FIG. (A) is the figure which showed typically the through-hole vicinity of the wall installed on the 2nd slab from the wall surface side in the state which made the 2nd slab a cross section, (b) is (a) FIG. 2C is a diagram illustrating a partial cross-sectional view taken along the line II of FIG. 2C, and FIG. 2C schematically illustrates a relationship between a through-hole of a wall installed on the second slab and an upper surface of the first slab. It is sectional drawing, (d) is sectional drawing which shows typically the 1st and 2nd slab and wall which are employ | adopted for the building structure which concerns on other embodiment of this invention. It is a schematic diagram which shows the building structure which concerns on other embodiment of this invention as a partial cross section. It is a schematic diagram which shows the building structure which concerns on the conventional SI type | mold apartment as a partial cross section. It is a schematic cross section which shows the waterproofing measure given to the upper surface of the slab where a wall stands up.

  Hereinafter, building structures according to various embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the vertical direction (vertical direction) means the direction of gravity, and indicates the vertical direction of the drawing. That is, the direction from the upper side to the lower side of the drawing is the direction of gravity acting on the object. Further, the horizontal direction means a direction orthogonal to the vertical direction.

  The building structure according to the embodiment shown in FIG. 1 is employed in a piping system such as a building such as an apartment house mainly composed of a plurality of floors. Hereinafter, the present embodiment will be described using a siphon drainage piping system that uses siphon force to flow the drainage of each floor of an apartment house downward.

As shown in FIG. 1, in the building structure according to the present embodiment, the slab is composed of two parts. Reference numeral 1 is a first slab, and reference numeral 2 is a second slab. The second slab 2 is located at a position lower than the upper surface 1f of the first slab 1, that is, at the same height as the lower surface of the first upper surface 2f ₁ and the upper surface 1f of the first slab 1. And an upper surface 2f ₂ . In the present embodiment, the upper surface 1f of the first slab 1, the first upper surface 2f ₁ and the second upper surface 2f ₂ of the second slab ₂ are each composed of a flat horizontal plane extending in the horizontal direction. That is, a first upper surface 1f of the slab 1 and the first upper surface 2f ₁ and the second upper surface 2f ₂ of the second slab 2 are arranged in parallel. Furthermore, in this embodiment, one end 3 of the first slab 1 (hereinafter also referred to as “end 3 of the first slab 1”) forms a step with the second slab 2. In the present embodiment, the end 3 of the first slab 1 extends in the vertical direction. In the present embodiment, the first slab 1 and the second slab 2 are integrally formed.

Reference numeral 4 denotes a wall installed on the second slab 2. In the present embodiment, the wall 4 is an RC wall that stands up from the first upper surface 2 f _{1 of} the second slab 1. The wall 4 divides the first slab 1 side as a living room part such as a residence, while the second slab 2 side opposite to the living room part across the wall 4 is divided as an outdoor part such as a shared hallway. ing. In this embodiment, the flooring 5 is arrange | positioned at the living room part, and the said living room part is comprised as a double floor. In the present embodiment, the flooring 5 is disposed on the upper surface 1f of the first slab 1 via a support 6 such as a cushioning material or a support bolt. Thus, in the present embodiment, underfloor bosom formed below the flooring 5 includes a first underfloor bosom S ₁ formed between the flooring 5 and the first slab 1, floor material 5 and the second It consists of a second underfloor space S ₂ formed between the slab 2.

A through hole 4 a is formed in the wall 4. In the present embodiment, the through-hole 4a formed in the wall 4, above the upper surface 2f ₁ of the second slab 2, in isocratic, (preferably horizontal) substantially horizontally is formed on. In the present embodiment, the wall 4 is spaced from the end 3 of the first slab 1 facing the wall 4, that is, the wall 4 faces the wall 4 on the first slab 1 side of the wall 4. A distance D is placed between the first slab 1 and the end 3 of the first slab 1 arranged at the position, and the first slab 1 is disposed on the upper surface 2f ₁ of the second slab 2 and extends in the vertical direction. Thereby, as shown in FIG. 1 and FIG. 2, a gap C is formed between the end 3 of the first slab 1 and the wall 4. In addition, the through-hole 4a formed in the wall 4 is not limited to what was formed horizontally like this embodiment, and does not need to be horizontal. In the present embodiment, the wall 4 has been described as an RC wall. However, the wall 4 may be a so-called PC wall in which a factory-produced wall is brought into the site and connected to a slab or the like.

  The 1st slab 1 and the 2nd slab 2 comprise the floor slab which divides each floor of an apartment house up and down. In the present embodiment, the second slab 2 is formed with through holes 2a and 2b that penetrate the second slab 2 up and down.

Reference numeral 10 denotes a drainage stack that allows drainage to flow downward. The drainage stack 10 passes through the second slab 2 on each floor of the apartment house through the through-hole 2a formed in the second slab 2. In the present embodiment, the inside of the through hole 2a where the drainage stack 10 is disposed is sealed with mortar M or the like. Further, in the present embodiment, the wall 4, are depressions formed between the step formed between the first top surface 2f ₁ of the second slab 2 and the second upper surface 2f _2, the The depression is backfilled with mortar M or the like. More specifically, the upper surface of the portion backfilled with mortar M or the like constitutes the floor surface of the space in which the meter box MB or the like is disposed, and the first upper surface 2f ₂ of the second slab ₂ is the common corridor. It constitutes the floor. The upper surface of the portion backfilled with mortar M or the like can be the same surface as the second upper surface 2f _{2 of} the second slab 2, or can be higher than the second upper surface 2f _{2 of} the second slab 2. . In this case, it is possible to suppress the accumulation of water on the upper surface of the portion backfilled with mortar M or the like. Furthermore, by providing a through hole (not shown) that penetrates the mortar M and the second slab in the portion backfilled with the mortar M or the like, it is possible to further suppress the occurrence of water pool.
The depression does not have to be backfilled with mortar M or the like, and in that case, a through hole (not shown) penetrating the second slab is provided to suppress the occurrence of a puddle in which rainwater or the like accumulates in the depression. I can do it.

  In FIG. 1, reference numeral 20 denotes a siphon drain pipe that partially penetrates the wall 4 a through a through hole 4 a formed in the wall 4. In the present embodiment, the siphon drain pipe 20 is formed of a horizontal pull pipe 21 and a soot pipe 22. Reference numeral 30 denotes a watering device such as a washstand or a bathroom (unit bath). In the present embodiment, as shown in FIG. 1, the watering device 30 is illustratively a bathroom (unit bath) 30a. The watering device 30 has a drain trap 31 for preventing the invasion of bad odors and pests immediately below it. In the present embodiment, the drain trap 31 is disposed at the lower end of the watering device 30 below the flooring 5. Moreover, in this embodiment, the drain trap 31 is arrange | positioned above the upper surface 1f of the 1st slab 1 by the planar view which looked at the upper surface 1f of the 1st slab 1 from the upper direction. Preferably, a first wall disposed between the wall 4 and the end 3 of the first slab 1 facing the wall 4, that is, at a position facing the wall 4 on the first slab 1 side of the wall 4. The distance D between the end 3 of the slab 1 is set between the wall 4 and the watering device 30, that is, the wall 4 of the watering device 30 facing the wall 4 and the wall surface of the wall 4 on the first slab 1 side. It arrange | positions so that it may become shorter than the space | interval between the edge of this side. In the present embodiment, the entire bathroom including the watering device 30 is disposed above the first slab 1.

  The drain trap 31 may be a water-sealed type that blocks the passage with water, a self-sealing type that uses a check valve or the like, and other various types. Further, the drain trap 31 communicates with the storage tank 33 through the connecting pipe 32. As shown in FIG. 1, one end of the siphon drain pipe 20 (end of the horizontal pull pipe 21) 20 a is connected to the storage tank 33. That is, in this embodiment, the watering device 30 having the drain trap 31 is indirectly connected to the upstream side of the siphon drain pipe 20 via the storage tank 33 and the connection pipe 32. The other end of the siphon drain pipe 20 (the end of the soot pipe 22) is connected to the drain stack 10 (not shown here).

As described above, in the present embodiment, the siphon drain pipe 20 has the horizontal pull pipe 21 connected to the storage tank 33. Lateral pulling tube 21, through the through-hole 4a formed in the wall 4, the first upper surface 1f of the slab 1 in the first floor in the bosom S ₁ and the second underfloor bosom S within ₂ (underfloor space), the first slab 1 is disposed along the upper surface 1f. As shown in FIG. 2, the horizontal pulling pipe 21 is horizontally disposed on the upper surface 1 f of the first slab 1 with no gradient. Furthermore, in this embodiment, the soot tube 22 connected to the horizontal pulling tube 21 penetrates in the vertical direction through the through hole 2b formed in the second slab 2. In the present embodiment, the dredger pipe 22 is connected to the drainage stack 10 (not shown here). That is, the dredger pipe 22 joins the drainage stack 10 at a position lower than the horizontal pull pipe 21. The siphon drain pipe 20 may be configured by assembling a plurality of pipe bodies or may be configured as a single pipe body as long as the distribution in the siphon drain pipe 20 is ensured.

  The through-hole 4a can be configured such that one horizontal pulling tube 21 is disposed in one through-hole 4a. However, as described later, a plurality of horizontal pull-out tubes 21 are disposed in one through-hole 4a. You can also Further, a plurality of through holes 4a are formed in the wall 4, one of the horizontal pulling tubes 21 is disposed in at least one of the through holes 4a, and the plurality of horizontal pulling tubes 21 are disposed in the other at least one through hole 4a. It can be configured. In the present embodiment, as an example, as shown in FIG. 3A, the through hole 4 a is formed as an opening having a rectangular appearance when viewed from the wall surface side of the wall 4. Thereby, the horizontal pulling pipes 21 of the siphon drain pipes 20 can be penetrated through the through holes 4a (four in the present embodiment, for example).

In the present embodiment, the height h ₄ from the _first upper surface 2f ₁ of the second slab 2 at the lower end of the through hole 4a (hereinafter also referred to as “through hole lower end height h ₄ ”) is 30 mm or more (h ₄ ≧ 30 mm).
In this case, when waterproofing is applied to the connection surface between the _first upper surface 2f _{1 of} the second slab 2 and the lower end surface of the wall 4, the wall surface of the wall 4 directly below the through hole 4a and the second slab 2 For example, a waterproof material such as urethane resin can be applied to the first upper surface 2f ₁ without interfering with the through hole 4a. Furthermore, if the through hole lower end height h ₄ is 30 mm or more, when the wall 4 is attached to the first upper surface 2f ₁ of the second slab 2, the wall surface of the wall 4 immediately below the through hole 4a and the second slab 2 A fixture (not shown) can be disposed on the first upper surface 2f ₁ without interfering with the through hole 4a. Further, if the through hole lower end height h ₄ is 30 mm or more, the wall 4 is an RC wall and it is necessary to reinforce the periphery of the through hole 4a. For example, as shown in FIGS. As shown, an opening reinforcing bar R can be inserted around the through hole 4a of the wall 4 to partially reinforce the periphery of the through hole 4a of the wall 4.

In addition, in the present embodiment, as shown in FIG. 3C, a gap C is formed between the end 3 of the first slab 1 and the wall 4, so that the gap C (second) in the living room portion. Work such as waterproofing can be performed from the side of the floor floor S ₂ ) and the side of the outside of the room (opposite the gap C across the wall 4).

In addition, as shown in FIG. 1, in the present embodiment, since the upper surface 1 f of the first slab 1 is higher than the first upper surface 2 f _{1 of} the second slab 2, the horizontal pulling tube of the siphon drain pipe 20. Even when 21 is arranged along the upper surface 1f ₁ of the first slab 1, the first slab is smaller than the height from the first upper surface 2f _{1 of} the second slab 2 to the through hole 4a in the living room portion. The horizontal pulling pipe 21 of the siphon drain pipe 20 may be raised by the height from the upper surface 1f of 1 to the through hole 4a and passed through the through hole 4a. That is, in this embodiment, the horizontal pulling pipe 21 of the siphon drain pipe 20 is connected to the wall 4 from the first upper surface 2f _{1 of} the second slab 2 as in a conventional building structure in which the living room portion is composed only of the second slab. There is no need to make it rise along the through hole 4a. Thereby, in this embodiment, even if it arrange | positions along the upper surface 1f of the 1st slab 1 and the horizontal draw pipe 21 of the siphon drain pipe 20 passes through the through-hole 4a of desired height, it ensures drainage performance. can do. In the most preferred embodiment of the present invention, the horizontal pulling pipe 21 of the siphon drain pipe 20 is set to be horizontal as in this embodiment.

Furthermore, in this embodiment, the height from the upper surface 1f of the first slab 1 of the central axis O of the through hole 4a is set to 0 mm or more. That is, the central axis O of the through-hole 4a is at a height position equal to or higher than the height of the upper surface 1f of the first slab 1. Referring to FIG. 3C, the height h ₀ from the _first upper surface 2f ₁ of the second slab 2 of the central axis O of the through hole 4a (hereinafter referred to as “the through hole center height h ₀ ”). say) is, the height h ₁ of the first upper surface 2f ₁ of the second slab 2 of the first slab 1 of the upper surface 1f (hereinafter, also referred to as "first slab height h ₁ ') or (h ₀ ≧ h ₁ , i.e., h ₀ −h ₁ ≧ ₀ mm), the through hole 4 a is formed. In this case, the wall portion can be more sufficiently secured below the through hole 4 a formed in the wall 4.

Furthermore, when the horizontal pulling pipe 21 of the siphon drain pipe 20 is disposed along the upper surface 1f of the first slab 1, the lower end of the through hole 4a formed in the wall 4 is as shown in FIG. The through hole lower end height h ₄ is the same as the first slab height h ₁ (h ₄ = h ₁ ). More preferred. Thereby, as shown in FIG. 2, the horizontal pulling pipe 21 of the siphon drainage pipe 20 passing through the through hole 4 a is disposed with no gradient substantially horizontally (preferably horizontal) with the upper surface 1 f of the first slab 1. The

Further, the present invention is through-hole lower height h ₄ is allowed to exceed the first slab height h _1, in the present embodiment, the first slab 1 of the upper surface 1f of the lower end of the through-hole 4a The height is set to 50 mm or less. That is, the through hole 4a is formed so that the height obtained by subtracting the first slab height h ₁ from the through hole lower end height h ₄ is 50 mm or less (h ₄ −h ₁ ≦ 50 mm).
In this case, efficient siphon drainage capacity can be maintained. In the present invention, the lower end of the through hole 4a may be located below the upper surface 1f of the first slab 1 (h ₄ <h ₁ , h ₄ −h ₁ <0).

  As described above, according to the new building structure according to the present embodiment, the climbing gradient of the horizontal pulling pipe (pipe) 21 of the siphon drain pipe 20 is suppressed to be small and lower than the through hole 4a formed in the wall 4. A certain wall portion can be secured on the side.

  Moreover, in the building structure which concerns on this embodiment, as shown in FIG. 1, the upper part 1f of the 1st slab 1 is made upward, the drain trap 31 of the watering device 30 connected in the upstream of the siphon drain pipe 20 is connected upward. It is arranged above the upper surface 1f of the first slab 1 in a plan view as viewed from above. In this case, the region of the second slab 2 in the living room (that is, the space region defined by the ceiling height hr on the right side of the drawing) is minimized to the wall 4 side, and the region of the first slab 1 (that is, the left side of the drawing). By enlarging the space area defined by the ceiling height hr to the wall 4 side, it is possible to suppress the expansion of the area of the second slab 2 in which the ceiling height hr falls in the living room. As a result, as shown in FIG. 1, a large area with a high ceiling height hr can be secured in the living room without increasing the floor height H itself.

Further, in the building structure according to the present embodiment, the wall 4 is installed on the first upper surface 2f _{1 of} the second slab 2 at a distance D from the end 3 of the first slab 1 facing the wall 4. . In this case, a space for waterproofing measures or the like can be secured on both wall surfaces of the wall 4. Note that the value of the distance D can be arbitrarily determined, but it is preferable to keep it small as long as a space for waterproofing measures can be secured on both wall surfaces of the wall 4. However, according to the present invention, the wall 4 is not spaced from the end 3 of the first slab 1 (without creating a gap C), as in the other embodiment shown in FIG. It is also possible to install on the upper surface 2f of the second slab 2 in a state where it is in contact with the end 3 of the first slab 1. In the present embodiment, the upper surface 2f of the second slab 2 is formed as a flat surface having no step as shown in FIG.

Further, according to the present invention, the ceiling height hr can be increased by specializing in the position of the siphon drain pipe 20. For example, the building structure according to the embodiment of FIG. 1 mainly assumes a barrier-free structure, and the floor material 5 has a top surface as a horizontal plane without providing a step. On the other hand, FIG. 4 is a building structure according to still another embodiment of the present invention. In the present embodiment, it is allowed to provide a step in the flooring 5. More specifically, the step of the flooring 5 is formed in the vicinity of the storage tank 33. In this case, it is possible to further reduce (lower) only the underfloor place (the first underfloor place S ₁ ′) where the siphon drain pipe 20 is disposed.

  What has been described above is merely illustrative of some embodiments of the invention, and various modifications are possible according to the claims. For example, the siphon drain pipe 20 (lateral pull pipe 21) can be at least one. Further, in each of the above embodiments, for example, the washing machine 30b illustrated in FIG. Moreover, in each said embodiment, although the drain trap 31 was comprised separately from the watering device 30, like the washstand 30c (watering device 30) of FIG. It can be provided integrally at the lower end. Moreover, in each said embodiment, although the siphon drain pipe 20 is connected with the storage tank 33, the storage tank 33 can be abbreviate | omitted. Further, in each of the above-described embodiments, the siphon drain pipe 20 is described as being joined to the drain stack 10, but the siphon drain pipe 20 is not joined to the drain stack 10, and the siphon drain capacity is maintained. It can also be made. Furthermore, in each of the above-described embodiments, the description has been given for the apartment house, but the present invention can be applied to various buildings such as general buildings. Moreover, each structure employ | adopted by said each embodiment can be used in combination with another embodiment suitably.

  Even in various buildings, a through-hole is formed in a wall formed on the slab by applying the structure in the new building structure according to the present invention, and the through-hole is disposed through the wall through a siphon drain pipe. It is possible.

DESCRIPTION OF SYMBOLS 1 1st slab 1f Upper surface of 1st slab 2 2nd slab 2f Upper surface of 2nd slab 2f ₁ Upper surface of 2nd slab 2f ₂ Upper surface of 2nd slab 3 End of 1st slab 4 Wall 4a Through-hole 5 Floor material 6 Support Material 10 Drainage pipe 20 Siphon drain pipe 20a One end 21 Horizontal pull pipe (Siphon drain pipe (pipe))
22 竪 pipe (siphon drain pipe)
30 Watering equipment 31 Drain trap 32 Connection pipe 33 Reservoir C Crevice D Interval O Center axis of through hole R Reinforcing bar H Floor height h ₀ Height of upper axis of second slab from center axis of through hole (through hole Center height)
h ₁ Height from the top surface of the first slab to the top surface of the second slab (first slab height)
h ₄ Height from the bottom of the through hole to the top of the second slab (through hole bottom height)
h _r Ceiling height S ₁ 1st floor bottom S ₁ '1st floor bottom S ₂ 2nd floor bottom

Claims (5)

The first slab,
A second slab having an upper surface at a position lower than the upper surface of the first slab;
A wall formed on the upper surface of the second slab;
A siphon drain pipe penetrating the wall through a through hole formed in the wall;
The building structure characterized in that a height of the lower end of the through hole from the upper surface of the second slab is 30 mm or more.   The building structure according to claim 1, wherein a height of the central axis of the through hole from the upper surface of the first slab is 0 mm or more.   The building structure according to claim 1 or 2, wherein a height of the lower end of the through hole from the upper surface of the first slab is 50 mm or less.   4. The drain trap of a watering device connected to the upstream side of the siphon drain pipe according to claim 1, wherein the drain trap of the first slab is viewed from above in a plan view. Building structure installed above the upper surface of the slab.   5. The building structure according to claim 1, wherein the wall is installed on an upper surface of the second slab at a distance from an end of the first slab facing the wall. 6.

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