JP5567846B2 - Piping structure of building and building piping construction method - Google Patents

Description

  The present invention relates to a building piping structure and a building piping construction method.

  Conventionally, various structures have been proposed for installing medium transport pipes such as water supply, hot water supply, and air conditioning refrigerant pipes inside buildings.

  For example, Patent Document 1 discloses a building in which a refrigerant pipe connecting an air conditioning indoor unit for an upper floor dwelling unit and an air conditioning outdoor unit provided outside a lower floor dwelling unit is passed through a protective pipe penetrating up and down the pipe space. The piping structure is disclosed.

  According to this configuration, it is possible to attach and remove the refrigerant pipe and the like of the air conditioner indoor unit for the upper floor room by work from the upper floor room and the outside without an operator entering the lower floor room.

JP 2006-170381 A

  However, since the configuration of Patent Document 1 directly accommodates a medium transport pipe such as a refrigerant pipe or a drain pipe in the protective tube, there is a possibility that the medium transport pipe is caught inside the protective pipe and cannot be smoothly inserted. was there. In particular, when the number of medium transport pipes increases, the medium transport pipes are entangled or rubbed with each other and cannot be smoothly inserted.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a building piping structure capable of smoothly inserting a medium transport pipe and a building piping construction method for constructing the building piping structure.

  In order to achieve the above object, a building piping structure according to the present invention is a building piping structure including a medium conveying pipe that is arranged in a building and conveys a medium, and a protective pipe that protects the medium conveying pipe. A sheath tube having a diameter smaller than that of the protection tube and larger than that of the medium transport tube is inserted into the protection tube, and the medium transport tube is inserted into the sheath tube.

  In addition, a plurality of the sheath tubes can be inserted into the protective tube, and the medium transport tube can be inserted into each of the sheath tubes.

  The building has an upper floor portion and a lower floor portion, and a piping space extending from the floor to the ceiling is provided in the lower floor portion, and the floor of the lower floor portion is provided in the piping space. It can be set as the structure by which the said protection pipe penetrated to the floor of the said upper floor part is installed.

  Furthermore, the sheath tube is preferably configured to be bendable.

  And the said protective pipe shall be the structure which has a lower pipe part shorter than the height from the floor of the said lower floor part to a ceiling, and an upper pipe part connected via a joint on the said lower pipe part. Can do.

  The building piping construction method of the present invention is a building piping construction method for constructing the above-described building piping structure, and the lower portion of the lower pipe portion is inserted into a mounting hole provided in the floor of the lower floor portion. The lower pipe portion is installed while standing, and the upper pipe is connected to the lower pipe portion via a fitting through the mounting holes provided in the floor of the upper floor portion and the ceiling of the lower floor portion from the upper floor portion. An upper pipe part connecting step, a sheath pipe installing step for inserting the sheath pipe from the upper floor part into the protective pipe configured by connecting the upper pipe part and the lower pipe part, and the sheath And a medium transport pipe installation step of inserting the medium transport pipe through the pipe from the upper floor portion.

  Thus, the building piping structure of the present invention is a building piping structure including a medium transport pipe and a protection pipe, and a sheath pipe having a smaller diameter than the protection pipe and a larger diameter than the medium transport pipe is inserted into the protection pipe. The medium carrying tube is inserted into the sheath tube.

  Therefore, since each medium conveyance pipe can be guided by the sheath pipe arranged individually for each medium conveyance pipe, the medium conveyance pipe can be smoothly inserted when the medium conveyance pipe is inserted into the protection pipe. .

  In addition, since a plurality of sheath tubes are inserted into the protective tube, and a medium transport tube is inserted into each sheath tube, even when there are a plurality of media transport tubes, each sheath tube is inserted, It can be smoothly inserted in an aligned state.

  In addition, the building has an upper floor and a lower floor. The lower floor is provided with a piping space extending from the floor to the ceiling, and the piping space has a floor from the lower floor to the upper floor. By installing a protective pipe that penetrates to the upper floor, it is possible to maintain and manage the media transport pipe on the upper floor without entering the lower floor.

  Furthermore, since the sheath pipe is configured to be bendable, it becomes possible to install the sheath pipe after building the structural part of the building, so it is necessary to use a seamless sheath pipe from the lower floor to the upper floor. it can.

  And the protective pipe has a lower pipe part shorter than the height from the floor to the ceiling of the lower floor part, and an upper pipe part connected via a joint on the lower pipe part, so that the structural part of the building After the construction, a protective tube that penetrates from the lower floor to the upper floor can be installed.

  Further, the building piping construction method of the present invention is a building piping construction method for constructing the above-described building piping structure, while inserting the lower part of the lower pipe part into the mounting hole provided in the floor of the lower floor part. A lower pipe portion installation step for standing, and an upper pipe portion installation step for connecting the upper pipe portion via a joint on the lower pipe portion through a mounting hole provided in the floor of the upper floor and the ceiling of the lower floor, A sheath tube installation process for inserting the sheath tube from the upper floor into the protective tube configured by connecting the upper tube section and the lower tube section, and a medium transport tube installation process for inserting the medium transport pipe into the sheath tube from the upper floor section. And.

  For this reason, even after the structural part of the building is constructed, the protective tube, the sheath tube and the medium transport tube can be installed.

It is a perspective view explaining the structure of the piping structure of the building of this invention. It is explanatory drawing explaining the whole structure of a building. It is sectional drawing explaining the structure of the piping structure of the building of this invention. It is a front view explaining the structure of a cap. (A) is a case where the diameter of a sheath pipe is equal, (b) is a case where the diameter of a sheath pipe is different. It is explanatory drawing explaining the piping construction method of a building. (A) is a lower pipe part installation process, (b) is an upper pipe part installation process. It is explanatory drawing explaining the piping construction method of a building. (A) is a sheath tube installation step, and (b) is a medium transport tube installation step.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, the whole structure of the unit building 5 as a building provided with the piping structure 4 of the building of this invention is demonstrated using FIG.

  As shown in FIG. 2, the unit building 5 as a building including the piping structure 4 of the building of the present invention is installed on the floor lower part 90 surrounded by the floor 81 of the base part and the lower floor part 80, and the foundation. The lower floor part 80 and the upper floor part 70 installed on the lower floor part 80 are provided.

  This unit building 5 is constructed by transporting a plurality of building units manufactured in a factory to the site by a trailer or the like and arranging them side by side on a foundation by a crane.

  Each building unit, as a building structure, has four columns arranged at the top of a rectangle, four floor beams connecting the lower ends of the columns, and four connecting the upper ends of the columns. It has a frame structure consisting of a ceiling beam of books.

  The lower floor portion 80 is formed by a floor 81, a ceiling 82, and a wall. The floor 81 and the ceiling 82 are provided with mounting holes 81a, 82a having a diameter slightly larger than the outer diameter of the protective tube 2. ing.

  Similarly, the upper floor portion 70 is formed by a floor 71, a ceiling 72, and a wall. The floor 71 is provided with an attachment hole 71a having a diameter slightly larger than the outer diameter of the protective tube 2.

  Further, the unit building 5 is configured as an apartment house, and baths 73 and 83, kitchens (not shown), toilets, and washrooms are arranged on the upper floor 70 and the lower floor 80, respectively.

  Therefore, in order to supply water or hot water to the upper floor portion 70, it is necessary to install the medium transport pipe so as to pass through the lower floor portion 80 where others live. For this reason, piping space A1, A2 which is a common space is formed in the lower floor part 80 and the upper floor part 70. As shown in FIG.

  The piping spaces A1 and A2 are formed on the back sides of the washstands of the upper floor portion 70 and the lower floor portion 80, and are separated from the living space by walls. The wall is provided with an inspection port that can be opened and closed for maintenance of the medium transport pipe.

  As shown in FIGS. 1 and 3, the building piping structure 4 of the present embodiment includes a water supply pipe 11, a hot water supply pipe 12, a hot water supply pipe 13 as a medium transport pipe arranged in the building, and This is a building piping structure 4 including a return pipe 14 and a protective pipe 2 that houses and protects the plurality of medium transport pipes.

  Further, a sheath tube 31, 32, 33, 34 having a diameter smaller than that of the protection tube 2 and larger than that of the medium carrying tube is inserted into the protection tube 2, and the sheath tubes 31, 32, 33, 34 are inserted into the sheath tube 31, 32, 33, 34. Each medium transport tube is inserted.

  The protective tube 2 is formed in a cylindrical shape from a flame-retardant synthetic resin such as hard vinyl chloride, and includes a cap 21 that closes the upper end, an upper tube portion 22 having a length of about 600 mm, and an upper tube portion 22. And a lower pipe portion 24 having a length of about 2400 mm, and a cap 25 that closes the lower end, and as a whole from the floor 81 of the lower floor portion 80. It is formed to have a length that penetrates to the floor 71 of the floor 70.

  The caps 21 and 25 are formed in a cylindrical container shape from a flame-retardant synthetic resin such as hard vinyl chloride, and through holes 21a to 21d for inserting the medium transport pipe are formed in the bottom plate portion and the medium transport pipe. The same number or more.

  When the diameters of the medium transport pipes accommodated in the protective pipe 2 are equal, all the insertion holes 21a-21d are formed in the same size and rotated by 90 degrees as shown in FIG. Evenly arranged at the positions.

  On the other hand, when only one medium transport pipe is larger than the other medium transport pipes among the medium transport pipes accommodated in the protective tube 2, as shown in FIG. 4B, one insertion hole 21a. However, the other insertion holes 21b-21d are formed small, the large-diameter insertion holes 21a are arranged slightly closer to the center, and the small-diameter insertion holes 21b-21d are evenly arranged.

  The length of the lower pipe portion 24 is formed by subtracting the margin from the height from the floor 81 to the ceiling 82 of the lower floor portion 80, and the length of the upper pipe portion 22 is the lower pipe portion 24. It is formed in a length that protrudes from the floor 71 of the upper floor 70 and reaches the position of the upper surface of the holder 26 in a state of being connected to the top.

  As shown in FIGS. 1 and 3, the sheath tube 31-34 is housed in the protective tube 2 and guides the medium transport tube. The sheath tube 31-34 has a loose structure made of a flexible synthetic resin such as polyethylene. It is formed in a bendable long cylindrical shape.

  In addition, since the sheath tube 31-34 is configured to be bendable and can be inserted from above after the construction of the protection tube 2, it is continuously continuous inside the protection tube 2, and the tube is connected with the loose structure. Improves sex.

  Further, the sheath pipe 31-34 is formed so that the inner diameter is larger than the outer diameter of the medium transport pipe so that the medium transport pipe can be accommodated, and the outer diameter is smaller than the inner diameter of the protective pipe 2 so as to be accommodated in the protective pipe 2. Has been. Preferably, the inner diameter of this sheath tube 31-34 is slightly larger than the outer diameter of the medium transport tube.

  Specifically, when the four tubes have the same diameter as shown in FIG. 4A, the outer diameter of the sheath tube 31-34 is 30.5 mm if the nominal diameter of the protective tube 2 is 75 mm and the inner diameter is 77 mm. The inner diameter is 24.5 mm, and the outer diameters of the water supply pipe 11, the hot water supply pipe 12, the going pipe 13, and the return pipe 14 as the medium transport pipe are 17.0 mm.

  Further, when only one diameter is different as shown in FIG. 4B, if the nominal diameter of the protective tube 2 is 75 mm and the inner diameter is 77 mm, the outer diameter of the small diameter sheaths 32, 33, and 34 is 27. The outer diameter of the hot water supply pipe 12, the outgoing pipe 13 and the return pipe 14 is 17.0 mm, the outer diameter of the large sheath 31 is 42.0 mm, and the inner diameter is 34.0 mm. The outer diameter of the water supply pipe 11 is 27.0 mm.

  Furthermore, the water supply pipe 11 and the hot water supply pipe 12 are medium conveyance pipes for water supply and hot water supply in the upper floor 70, and are formed in a flexible long cylindrical shape by a synthetic resin having flexibility such as crosslinked polyethylene. Yes.

  Further, branching headers 110 and 120 are connected to the downstream side of the water supply pipe 11 and the hot water supply pipe 12, and a kitchen, toilet, washbasin faucet and the like are provided downstream of the branching headers 110 and 120. It is connected.

  Similarly, the outgoing pipe 13 and the return pipe 14 are medium conveying pipes for the bath 73 of the upper floor 70, and are formed into a flexible long cylindrical shape by using a synthetic resin having flexibility such as crosslinked polyethylene. Has been.

  And the bath 73 of the upper floor part 70 is connected to one end of this going pipe 13 and the return pipe 14, and the water heater 91 is connected to the other end.

  Next, the building piping construction method of the present embodiment will be described with reference to FIGS. The building pipe construction method of the present embodiment is achieved by executing the lower pipe part installation process, the upper pipe part installation process, the sheath pipe installation process, and the medium transport pipe installation process in this order.

  First, the structural part of the building is constructed in advance. That is, each building unit manufactured in the factory is loaded onto a trailer and transported to the site, and the building structural portion is constructed by installing the building units in a predetermined position with a crane or the like.

  Furthermore, mounting holes 71 a, 81 a, 82 a having the same diameter as the outer diameter of the protective tube 2 are provided in the floor 71 of the upper floor 70, the floor 81 of the lower floor 80, and the ceiling 82.

  First, in the lower pipe portion installation step, as shown in FIG. 5A, the lower pipe portion 24 is erected while the lower portion of the lower pipe portion 24 is inserted into a mounting hole 81 a provided in the floor 81 of the lower floor portion 80.

  That is, while the lower tube portion 24 is passed through the holder 28, both are bonded, the cap 25 is fitted and bonded to the lower portion of the lower tube portion 24, and the lower portion is inserted into the mounting hole 81 a. And the upper part of the lower pipe part 24 is fixed to a wall with the support tool (bracket) which is not shown in figure.

  Next, in the upper pipe installation step, as shown in FIG. 5B, the lower floor 80 (or the upper floor 70) is provided on the floor 71 of the upper floor 70 and the ceiling 82 of the lower floor 80. The upper pipe portion 22 is connected to the lower pipe portion 24 via the joint 23 through the mounting holes 71a and 82a.

  That is, the joint 23 is abutted against and bonded to the standing lower pipe portion 24, and the upper pipe portion 22 is once lifted from the lower floor portion 80 through the mounting hole 82a provided in the ceiling 82 of the lower floor portion 80. And is inserted through a mounting hole 71 a provided in the floor 71 of the upper floor 70. Thereafter, the raised upper pipe portion 22 is lowered, and the holder 27 (see FIG. 2) is fitted and abutted against and bonded to the joint 23. Further, a holder 26 (see FIG. 2) is fitted to the upper portion of the upper tube portion 22 to bond them together.

  Subsequently, in the sheath tube installation step, as shown in FIG. 6A, the sheath tube 31-34 is connected from the upper floor portion 70 to the protective tube 2 formed by connecting the upper tube portion 22 and the lower tube portion 24. Insert it in an aligned state so as not to twist.

  That is, the sheath tube 31-34 is inserted into the insertion hole 21a-21d provided in the upper cap 21 of the protective tube 2 from above and aligned with the holes 25a-25d provided in the lower cap 25 ( In FIG. 3, the holes 25a and 25c are omitted).

  In this alignment, a rod-like member such as Shino is inserted into the holes 25a-25d of the lower cap 25 to guide the sheath 31-34 to the positions of the holes 25a-25d.

  Finally, in the medium transport pipe installation step, as shown in FIG. 6 (b), the water supply pipe 11, hot water supply pipe 12, outgoing pipe 13 and return pipe as medium transport pipes from the upper floor portion 70 to the sheath pipe 31-34. 14 are inserted separately. In this medium transport pipe installation step, each medium transport pipe is individually guided by the sheath pipes 31-34.

  The building piping structure 4 is constructed by executing the building piping construction method as described above.

  During maintenance, the inspection or replacement is facilitated by pulling out or inserting only the medium transport tube inside the sheath tube 31-34. That is, since the medium transport pipes are separately guided by the sheath pipes 31-34, the medium transport pipes are not entangled or rubbed with each other.

  Next, the effect | action of the piping structure 4 of the building of a present Example is demonstrated.

  (1) As described above, the building piping structure 4 of the present invention accommodates the water supply pipe 11, the hot water supply pipe 12, the memorial service pipe 13 and the return pipe 14 as medium transport pipes, and these medium transport pipes. It is the piping structure 4 of a building provided with the protection pipe 2 to do.

  Therefore, at the time of maintenance or the like, it is possible to inspect and replace the medium transport tube by inserting / removing only the medium transport tube inside the protective tube 2.

  A sheath pipe 31-34 having a diameter smaller than that of the protection pipe 2 and larger than that of the medium transport pipe is inserted into the protection pipe 2, and a medium transport pipe such as the water supply pipe 11 is inserted into the sheath pipe 31-34. Yes.

  Therefore, since each medium conveyance pipe can be guided by the sheath pipes 31-34 arranged individually for each medium conveyance pipe, when the medium conveyance pipe is inserted into the protective tube 2, it can be smoothly inserted. .

  That is, if the sheath pipes 31-34 are separately provided corresponding to the respective medium transport pipes, the path of the medium transport pipe is limited, so that the medium transport pipe is connected to the inner surface of the protective tube 2 when being inserted or removed. You won't get caught in.

  In addition, a seam is generated in the middle of the protective tube 2 for the convenience of installing the protective tube 2, but since the sheath tube 31-34 has no seam, the medium transport tube can be smoothly inserted.

  In other words, the sheath pipe 31-34 can ensure the insertability of the medium transport pipe while ensuring the rigidity necessary for the entire plumbing structure 4 of the building to stand upright with the outer protective pipe 2.

  In addition, if the protective tube 2 and the sheath tube 31-34 have a double structure as described above, the use of a flame-retardant hard polyvinyl chloride tube or the like as the protective tube 2 can prevent the spread of fire. Therefore, it is possible to satisfy the standards (Ministry of Construction Notification No. 1422) such as a water supply pipe penetrating the fireproof section of the semi-fireproof structure.

  In addition, the sheath tube 31-34 is formed so that the inner diameter thereof is substantially the same as the outer diameter of the medium transport tube, so that there is less room for the medium transport tube to flutter inside the sheath tube 31-34. It can be inserted smoothly.

  Further, by covering the medium transport pipe with the protective tube 2 and the sheath pipe 31-34 in this way, fluttering of the medium transport pipe due to the water hammer phenomenon can be suppressed and the soundproof performance can be improved. In this case, it is possible to further improve the soundproofing performance by winding a silencer tape around the outer periphery of the medium transport tube.

  (2) In addition, a plurality of sheath tubes 31-34 are inserted into the protective tube 2, and a medium transport tube is inserted into each of the sheath tubes 31-34, so that even when there are a plurality of media transport tubes, Since each sheath tube 31-34 is inserted, it can be smoothly inserted in an aligned state.

  That is, by separately inserting the medium transport tube into each of the sheath tubes 31-34 arranged in alignment in the protective tube 2, the medium transport tubes are entangled or rubbed when the medium transport tube is inserted or removed. It wo n’t fit.

  (3) The unit building 5 as a building has an upper floor portion 70 and a lower floor portion 80. The lower floor portion 80 is provided with a piping space A1 extending from the floor 81 to the ceiling 82, and By installing the protective pipe 2 penetrating from the floor 81 of the lower floor section 80 to the floor 71 of the upper floor section 70 in this piping space A1, the medium carrying pipe of the upper floor section 70 without entering the lower floor section 80. Can be maintained and managed.

  For example, when checking the water supply pipe 11, after tightening the main plug, an operator enters the lower floor 90 and removes the water supply pipe 11 and the like at the joint portion, and the inspection leads to the piping space A <b> 2 of the upper floor 70. The water supply pipe 11 connected to the header 110 can be removed by opening the mouth, and the water supply pipe 11 can be removed from the sheath pipe 31 for inspection or replacement.

  (4) Further, since the sheath pipe 31-34 is configured to be bendable, the sheath pipe 31-34 can be installed after the structural part of the building is constructed. Seamless sheaths 31-34 can be used over 70.

  In other words, the protective tube 2 fixed to the building has a seam due to restrictions when it is installed, but the inner sheath tube 31-34 can be transported and installed in a bent state, so that there is no seam.

  (5) The protective tube 2 includes a lower tube portion 24 that is shorter than the height from the floor 81 to the ceiling 82 of the lower floor portion 80, and an upper tube portion 22 that is connected to the lower tube portion 24 via the joint 23. , The protective tube 2 penetrating from the lower floor portion 80 to the upper floor portion 70 can be installed after the structural part of the building is constructed.

  (6) Moreover, the building piping construction method of the present embodiment is a building piping construction method for constructing the above-described building piping structure 4, and is provided below the mounting hole 81 a provided in the floor 81 of the lower floor portion 80. The lower pipe part installation step of standing while inserting the lower part of the pipe part 24 and the mounting holes 71a, 82a provided in the ceiling 71 of the floor 71 of the upper floor part 70 and the lower floor part 80 are provided on the lower pipe part 24. The upper pipe part 22 is connected to the upper pipe part 22 via the joint 23, and the sheath pipe 31-34 is connected from the upper floor part 70 to the protective pipe 2 formed by connecting the upper pipe part 22 and the lower pipe part 24. A sheath tube installation step for inserting and a medium transport tube installation step for inserting the medium transport tube from the upper floor portion 70 into the sheath tube 31-34 are provided.

  For this reason, even after the structural part of the building is constructed, the protective tube 2, the sheath tube 31-34, and the medium transport tube can be installed. In particular, if the building is a unit building 5, each building unit is manufactured at the factory up to the interior and then transported and assembled separately, so it is not possible to install a continuous medium transport pipe on the upper and lower floors during construction. This effect is great.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to the present invention. included.

  For example, in the above-described embodiment, the unit building 5 has been described as a building. However, the present invention is not limited to this, and the present invention can also be applied to a building of a conventional construction method or a building of a panel construction method.

  Moreover, although the said Example demonstrated the case where fluid conveyance pipes, such as the water supply pipe | tube 11, the hot water supply pipe | tube 12, the going-out pipe 13, and the return pipe | tube 14, were used as a medium conveyance pipe | tube, it is not limited to this. In addition, the present invention can be applied to a refrigerant pipe or a drain pipe for air conditioning as a medium transport pipe.

  Furthermore, in the said Example, although the case where the four sheath pipe | tubes 31-34 were arrange | positioned inside the protective tube 2 was demonstrated, it is not limited to this, Only one piece may be installed. It may be a book or four or more.

  In the above-described embodiment, the case where the protective tube 2 is a straight tube has been described. However, the present invention is not limited to this, and the protective tube may be a curved tube having a bent portion in the middle. If can be bent, the medium carrying tube can be smoothly inserted.

A1, A2 Piping space 11 Water supply pipe (medium transport pipe)
12 Hot water supply pipe (medium transport pipe)
13 Outbound pipe (medium transport pipe)
14 Return pipe (medium transport pipe)
2 Protective pipes 21 and 25 Cap 22 Upper pipe part 23 Joint 24 Lower pipe parts 31, 32, 33 and 34 Sheath pipe 4 Piping structure of building 5 Unit building (building)
70 Upper floor 71 Floor 71a Mounting hole 80 Lower floor 81 Floor 81a Mounting hole 82 Ceiling 82a Mounting hole

Claims (6)

A building piping structure comprising a medium carrying pipe arranged in a building and carrying a medium, and a protective pipe protecting the medium carrying pipe,
A plurality of sheath tubes having a diameter smaller than that of the protection tube and larger than that of the medium transport tube are inserted into the protection tube, and the medium transport tube is inserted into each of the sheath tubes ,
A plurality of the medium transport pipes include at least a water supply pipe and a hot water supply pipe . A building piping structure comprising a medium carrying pipe arranged in a building and carrying a medium, and a protective pipe protecting the medium carrying pipe,
A plurality of sheath tubes having a diameter smaller than that of the protection tube and larger than that of the medium transport tube are inserted into the protection tube, and the medium transport tube is inserted into each of the sheath tubes,
The protective tube is arranged with the longitudinal direction vertical, and at least the lower end thereof has an insertion hole through which the medium carrying tube is passed, and is closed with a cap that prevents the sheath tube from falling. piping structure of the building, characterized in that there. The building pipe structure according to claim 1 or 2 , wherein the sheath pipe has a loose structure and is configured to be bendable. The building has an upper floor portion and a lower floor portion, and a piping space extending from the floor to the ceiling is provided in the lower floor portion, and the piping space is provided from the floor of the lower floor portion. The building piping structure according to any one of claims 1 to 3, wherein the protective pipe penetrating to the floor of the upper floor is installed. The said protective pipe has a lower pipe part shorter than the height from the floor of the said lower floor part to a ceiling, and an upper pipe part connected via a joint on the said lower pipe part, It is characterized by the above-mentioned. Item 5. The piping structure of a building according to Item 4 . A building piping construction method for building a building piping structure according to claim 5,
A lower pipe portion installation step of standing while inserting a lower portion of the lower pipe portion into a mounting hole provided in the floor of the lower floor portion;
An upper pipe part installation step for connecting the upper pipe part via a joint on the lower pipe part through mounting holes provided in the floor of the upper floor part and the ceiling of the lower floor part,
A sheath tube installation step for inserting the sheath tube from the upper floor portion into the protective tube configured by connecting the upper tube portion and the lower tube portion,
A medium pipe construction method comprising: inserting a medium pipe into the sheath pipe through the medium pipe from the upper floor portion.

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