JP2013060794A - Building unit and construction method of unit building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase an interior ceiling height of a unit building with piping or wiring stored in an attic thereof.SOLUTION: In an upper building unit 10B which is placed on a lower building unit 10A, piping 50 extended in a horizontal direction inside a floor panel 20 is installed in a factory.

Description

  The present invention relates to a building unit and a method for constructing a unit building.

  There is a building unit that constitutes a unit building, as described in Patent Document 1, in which piping is attached to the upper surface of a ceiling surface material provided on a ceiling construction surface. The ceiling construction surface is constructed by spanning a plurality of ceiling beams over the ceiling beams, and ceiling surface materials are attached to these ceiling beams. The ceiling beam has a height of about 20 cm, and the piping is accommodated within the range of the height, and the ceiling beam and the ceiling surface material are positioned lower than the lower surface of the ceiling beam. For this reason, if the unit height is the same, the indoor height of the ceiling is reduced by an amount corresponding to the height of the ceiling beam.

  On the other hand, as described in Patent Document 2, there is a building unit that does not have a ceiling construction surface. The ceiling panel of this building unit does not have structural strength, and is thin enough that a ceiling surface material is attached to the ceiling frame material. For this reason, as compared with the above-mentioned building unit having a ceiling construction surface, the indoor height of the ceiling can be increased as much as there is no ceiling beam (if the unit height is the same).

JP 11-101496 A JP2001-193166

  In a building unit that does not have a ceiling construction surface as described in Patent Document 2 and is intended to increase the indoor height of the ceiling, as described in Patent Document 1, pipes are attached to the upper surface of the ceiling surface material at the factory. Then, there are the following problems. In other words, in order to take advantage of the high ceiling height, the ceiling panel is attached to the top of the building unit as much as possible. When piping is installed on the top surface of the ceiling surface material, the total height of the building unit is It becomes high by a considerable amount and exceeds the traffic limit in the traffic law.

  Note that if the ceiling height of the building unit is lowered in order to keep the total height of the building unit within the restricted transport height in accordance with the Traffic Law, the merit of increasing the ceiling indoor height is reduced.

  The subject of this invention is taking the indoor height of a ceiling high, putting piping or wiring in the ceiling back of a unit building.

  In the invention according to claim 1, in the upper floor building unit placed on the lower floor building unit, the pipe or wiring extending in the horizontal direction in the floor panel is installed in the factory. It is.

  The invention according to claim 2 attaches a ceiling surface material excluding the boundary between the two lower floor building units, and arranges the two lower floor building units adjacent to each other, and the two upper floors according to claim 1 A building unit is placed on each of the two lower floor building units, and a portion of the boundary between the two lower floor building units is not attached to the two upper floor building units. After connecting the pipes or wires between the two, the connecting ceiling surface material is attached to the boundary between the two lower floor building units.

  According to a third aspect of the present invention, floor materials are attached except for the boundary between the two upper-floor building units according to the first aspect, and the two upper-floor building units are respectively attached to the two lower-floor building units. After using the portion where the floor material of the boundary between the two upper floor building units is not attached, and performing pipe or wiring connection work between the two upper floor building units, A connecting floor material is attached to the boundary between the two upper-floor building units.

  According to a fourth aspect of the invention, in the invention according to the second or third aspect, the piping or wiring is further connected through an insertion hole provided in an outer peripheral frame of the floor panel.

  According to a fifth aspect of the present invention, in the first aspect of the present invention, a pipe or wiring extending in a vertical direction along the wall panel of the building unit is attached at a factory.

  According to a sixth aspect of the present invention, the upper-floor building unit according to the fifth aspect is placed on the lower-floor building unit, and a pipe or wiring extending in the vertical direction and a plurality of pipes extending in the horizontal direction Or it is the construction method of the unit building which provides the branch connection member which branches-connects wiring in the area | region of a lower-floor building unit.

  The invention according to claim 7 is the invention according to claim 6, wherein a ceiling surface material is further provided below the branch connection member in the lower floor building unit.

  The invention according to claim 8 is the invention according to claim 2, 3, 4, 6, or 7, wherein the ceiling of the lower floor building unit is thin and has no structural strength. is there.

(Claim 1)
(a) In an upper-floor building unit placed on a lower-floor building unit, piping or wiring extending horizontally in the floor panel is installed at the factory.

  Piping or wiring can be accommodated in the floor panel of the upper floor building unit that becomes the ceiling behind the lower floor building unit. At this time, the ceiling of the lower-floor building unit can be thinned by not attaching piping or wiring to the upper surface of the ceiling surface material, and the indoor height of the ceiling can be increased.

(Claim 2)
(b) A ceiling surface material is attached except for the boundary between two lower-floor building units, the two lower-floor building units are arranged adjacent to each other, and the two upper-floor building units in (a) above are respectively Piping or wiring between the two upper-floor building units using the part that is placed on the two lower-floor building units and where the ceiling surface material of the boundary between the two lower-floor building units is not attached After the connection work is performed, the connecting ceiling surface material is attached to the boundary between the two lower-floor building units.

  Attaching the ceiling surface material to the part excluding the boundary between the two lower-floor building units increases the factory production rate of the lower-floor building unit, and the ceiling surface material at the boundary between the two lower-floor building units. It is possible to improve the on-site workability of piping or wiring connection work between two upper-floor building units by using a portion where no is attached.

(Claim 3)
(c) Floor materials are attached except for the boundary between the two upper-floor building units described in (a) above, and the two upper-floor building units are placed on the two lower-floor building units, respectively, After connecting the pipe or wiring between the two upper floor building units using the part where the floor material of the boundary between the two upper floor building units is not attached, the two upper floor buildings Attach the connecting floor material to the boundary of the unit.

  By attaching flooring materials to the parts other than the boundary between the two upper-floor building units in advance, the factory production rate of the upper-floor building units is increased and the flooring material at the boundary between these two upper-floor building units. It is possible to improve the on-site workability of piping or wiring connection work between two upper-floor building units by using a portion where no is attached.

(Claim 4)
(d) The piping or wiring between the above-mentioned building units (b) and (c) shall be made through the insertion hole provided in the outer peripheral frame of the floor panel. It is possible to improve the local workability of wiring connection work.

(Claim 5)
(e) In the upper-floor building unit described above (a), pipes or wirings extending in the vertical direction along the wall panels are further installed at the factory. In a system in which equipment is installed above the upper floor building unit (attic etc.), the factory production rate can be increased by installing piping or wiring connected to the equipment in the factory.

(Claim 6)
(f) The above-mentioned upper building unit (e) is placed on the lower building unit, and piping or wiring extending in the vertical direction and a plurality of piping or wiring extending in the horizontal direction are branched and connected. A branch connecting member is provided in the area of the lower building unit. It is possible to improve the local workability of pipe or wiring connection work extending from the upper side of the upper floor building unit to a plurality of locations of the lower floor building unit.

  The branch connection member can be installed on the lower surface of the floor panel of the upper building unit. Alternatively, the branch connection member can be attached to the upper part of the wall panel of the lower floor building unit at the factory or in the field.

(Claim 7)
(g) After the branch connection member (f) described above is provided in the area of the lower floor building unit, a ceiling member is provided below the branch connection member in the lower floor building unit. The installation work of the branch connection member in the area | region of a lower floor building unit, and the local construction property of the branch connection work of piping or wiring using a branch connection member can be improved.

(Claim 8)
(h) The ceiling height of the lower floor building unit described above (b), (c), (d), (f), (g) should be thin so as not to have structural strength. Can surely be taken high.

FIG. 1 is a schematic diagram showing an installation process of a lower floor building unit. FIG. 2 is a schematic diagram showing an installation process of the upper floor building unit. FIG. 3 is a schematic diagram showing a pipe connection process. FIG. 4 is a schematic view showing a connecting ceiling surface material attaching process. FIG. 5 is a schematic view showing a connecting floor surface material attaching process. FIG. 6 is a perspective view showing a pipe mounting state of the floor panel of the upper floor building unit. FIG. 7 is a schematic diagram showing a pipe connection structure. FIG. 8 is a schematic diagram showing a pipe mounting state of the floor panel and wall panel of the upper floor building unit. FIG. 9 is a schematic diagram showing a branch connection state of piping.

(Example 1) (FIGS. 1-4, 6 and 7)
1 to 4 has a plurality of lower-floor building units 10A placed on the foundation 1, and a plurality of upper-floor building units 10B placed on the lower-floor building units 10A. Built.

  The lower-floor building unit 10A and the upper-floor building unit 10B are manufactured in a factory, and both can be configured substantially the same. The lower floor building unit 10 </ b> A and the upper floor building unit 10 </ b> B include a floor panel 20, a wall panel 30 standing on the outer edge of the floor panel 20, and a ceiling panel 40 attached to the uppermost end of the wall panel 30. Configured.

  As shown in FIG. 6, the floor panel 20 is configured by attaching a lower frame member 21 </ b> C to a lower surface of a floor frame assembly 21 including a side joist 21 </ b> A and an end joist 21 </ b> B, and a floor material 22 to an upper surface.

  Although not shown in detail, the wall panel 30 is configured by attaching a wall surface material 32 to the surface of a wall frame assembly 31 composed of an upper frame material, a lower frame material, and a vertical frame material.

  Although not shown in detail, the ceiling panel 40 is configured by attaching a ceiling surface material 42 to a lower surface of a ceiling frame assembly 41 including side frame materials and field edges.

  Hereinafter, the construction method of the present invention that can increase the indoor height of the ceiling while placing piping or wiring behind the ceiling of the unit building 100 will be described.

  The upper-floor building unit 10B placed on the lower-floor building unit 10A is a pipe or wiring extending horizontally in the floor panel 20 as shown in FIG. A pipe 50, which is a flexible duct for air conditioning equipment, is attached. The pipe 50 is inserted into the insertion hole 51 formed in the side joist 21A of the floor frame assembly 21 and routed on the floor material 22 in the floor frame assembly 21 at the factory construction stage, by an unillustrated attachment band or the like. It is fixed to the side joist 21A.

  Here, one upper-floor building unit 10B (10B on the right side of FIG. 2) of the two upper-floor building units 10B and 10B that are adjacent to each other at the building site is the other upper-floor building at the building site. The lead-out end 50A of the pipe 50 drawn out for connection with the other pipe 50 on the unit 10B (the left side 10B in FIG. 2) is inside the floor frame 21 at the factory production stage of the one upper floor building unit 10B. It is stored in a state in which it can be pulled out of the floor frame 21 in a bent state. The lead-out end 50A of the pipe 50 accommodated in one upper-floor building unit 10B is drawn outward from the insertion hole 51 provided in the side joist 21A constituting the outer peripheral frame of the floor frame assembly 21 and connected to the other pipe 50. Made possible.

  And the other pipe 50 on the other upper floor building unit 10B (10B on the left side in FIG. 2) of the two upper floor building units 10B and 10B that will be adjacent to each other at the construction site At the factory construction stage of the upper floor building unit 10B, the upper floor building unit 10B is fixedly attached and stored in a predetermined piping position in the floor frame 21.

  At this time, it is preferable that the ceiling panel 40 of the lower floor building unit 10 </ b> A is a thin panel having no structural strength. The ceiling panel 40 of the upper floor building unit 10B can also have the same configuration. For example, as described in JP-A-2001-193166, the ceiling panel 40 has structural strength by making the side frame material and the field edge of the ceiling frame assembly 41 made of C-shaped steel, C-shaped steel with lips, or the like. It can be made thin.

Hereinafter, the construction procedure of the unit building 100 will be described.
(1) At the factory production stage of the upper floor building unit 10B, the pipe 50 is attached to the floor panel 20 as described above.

  In addition, in the factory production stage of the lower-floor building unit 10A, the ceiling panels 40 of the two lower-floor building units 10A and 10A are attached to the ceiling surface material 42 only in a range excluding their boundary portions.

  The lower-floor building unit 10A and the upper-floor building unit 10B are transported to the building site.

  (2) The two lower-floor building units 10A and 10A of (1) described above are placed adjacent to the foundation 1 of the construction site (FIG. 1).

  (3) The two upper building units 10B and 10B of (1) described above are placed on the two lower building units 10A and 10A, respectively (FIG. 2).

  (4) The pipe 50 is connected between the two upper building units 10B and 10B by using the portion where the ceiling member 42 at the boundary between the two lower building units 10A and 10A is not attached ( FIG. 3).

  At this time, the drawing end 50A of the pipe 50 on the one upper floor building unit 10B side is pulled out from the insertion hole 51 provided in the side joist 21A of the outer peripheral frame of the one upper floor building unit 10B. The other upper floor building unit 10B is drawn into the floor frame assembly 21 of the other upper floor building unit 10B from the insertion hole 51 provided in the side joist 21A of the outer peripheral frame of the other upper floor building unit 10B. Then, in the floor framework 21 of the other upper-floor building unit 10B, the lead-out end 50A of the pipe 50 drawn from the one upper-floor building unit 10B side and the end of the other pipe 50 are connected via a joint 52. Then, the connection tape 53 is attached around the connection portions (FIG. 7).

  (5) The connecting ceiling surface material 43 is attached to the portion where the ceiling surface material 42 at the boundary between the two lower floor building units 10A and 10A is not attached (FIG. 4).

Therefore, according to the present embodiment, the following operational effects can be obtained.
(a) In the upper-floor building unit 10B placed on the lower-floor building unit 10A, a pipe 50 extending in the horizontal direction in the floor panel 20 is attached at the factory.

  The piping 50 can be accommodated in the floor panel 20 of the upper-floor building unit 10B that becomes the ceiling behind the lower-floor building unit 10A. At this time, the ceiling of the lower-floor building unit 10A can be made thinner by not attaching the pipe 50 to the upper surface of the ceiling face material 42, and the indoor height of the ceiling can be increased.

  (b) The ceiling member 42 is attached except for the boundary between the two lower-floor building units 10A, the two lower-floor building units 10A are disposed adjacent to each other, and the two upper-floor building units 10B described in (a) above are disposed. Are placed on the two lower-floor building units 10A, respectively, and the two upper-floor buildings are used by using the portion of the boundary between the two lower-floor building units 10A where the ceiling member 42 is not attached. After connecting the pipes 50 between the units 10B, the connecting ceiling surface material 43 is attached to the boundary between the two lower-floor building units 10A.

  By attaching the ceiling face material 42 in advance to the portion excluding the boundary between the two lower-floor building units 10A, the factory production rate of the lower-floor building unit 10A is increased, and the boundary between the two lower-floor building units 10A. It is possible to improve the local workability of the connection work of the pipe 50 between the two upper floor building units 10B by using the portion where the ceiling surface material 42 is not attached.

  (c) By making the ceiling of the lower floor building unit 10A described above (b) thin so as not to have structural strength, the ceiling height of the ceiling can be reliably increased.

  (d) The connection of the piping 50 of the above (b) is made through the insertion hole 51 provided in the side joist 21A constituting the outer peripheral frame of the floor panel 20, so that the two upper building units 10B are connected. It is possible to improve the local workability of the connection work of the piping 50 between them.

(Example 2) (FIG. 5)
In addition, at the factory production stage of the upper floor building unit 10B, the pipe 50 is attached to the floor panel 20, and the floor panels 20 of the two upper floor building units 10B and 10B are floor materials only in a range excluding their boundary portions. 22 may be attached. In this case, the ceiling panel material 42 is attached to the entire range of the ceiling panels 40 of the two lower-floor building units 10A and 10A including their boundary portions.

  In the construction method of the unit building 100 using the lower floor building unit 10A and the upper floor building unit 10B described above, the two upper floor building units 10B and 10B are placed on the two lower floor building units 10A and 10A, respectively. Then, the pipe 50 is connected between the two upper building units 10B and 10B (floor panel) using the portion where the floor material 22 at the boundary between the two upper building units 10B and 10B is not attached. The same connection work as in the above embodiment, such as using the insertion holes 51 provided in the side joists 21A of the 20 outer peripheral frames). After that, as shown in FIG. 5, the connecting floor surface material 23 is attached to the portion where the floor surface material 22 at the boundary between the two upper floor building units 10 </ b> B and 10 </ b> B is not attached.

  The floor material 22 is attached in advance to the portion excluding the boundary between the two upper building units 10B and 10B, thereby increasing the productivity of the upper building unit 10B and the two upper building units 10B and 10B. It is possible to improve the on-site workability of the connection work of the pipe 50 between the two upper building units 10B and 10B by using the part where the floor material 22 of the boundary part is not attached.

Example 3 (FIGS. 8 and 9)
Similar to the unit building 100 of the first embodiment, the unit building 200 of the third embodiment places a plurality of lower floor building units 10A on the foundation 1 and places a plurality of upper floor building units 10A on the lower floor building units 10A. It is constructed by placing the floor building unit 10B.

  Hereinafter, when piping or wiring is performed over a plurality of locations on the upper floor from the upper floor of the unit building 200, the interior height of the ceiling can be increased while the piping or wiring is placed behind the ceiling of the unit building 200. The construction method of the invention will be described.

  The upper-floor building unit 10B placed on the lower-floor building unit 10A has a plurality of pipes or wires extending horizontally in the floor panel 20 as shown in FIG. In the example, a plurality of pipes 50, which are flexible ducts for air conditioning equipment, are fixedly attached as in the first embodiment shown in FIG.

  Here, one end of each pipe 50 attached in the floor panel 20 of the upper floor building unit 10B is a connection end 50A for connection with a branch connection member 70 described later, and the other end of each pipe 50 is A connection end 50B for connection to an air supply grill 80 installed in the lower floor building unit 10A is used. The connection ends 50A and 50B are stored in a bent state in the floor frame assembly 21 at the factory production stage of the upper floor building unit 10B.

  Further, the upper-floor building unit 10B is a pipe or wiring extending vertically in the wall panel 30, as shown in FIG. 8, in the factory production stage, which is a flexible duct of an air conditioning facility in this embodiment. 60 is fixedly mounted. The pipe 60 can be pulled out of the wall frame 31 through an insertion hole formed in the upper frame material of the wall frame 31 at the factory production stage, and attached to the vertical frame material in the wall frame 31 by an attachment band or the like. It is fixed, inserted through an insertion hole formed in the lower frame material of the wall frame 31, and inserted into the floor frame 21.

  Here, the upper end of the pipe 60 attached in the wall panel 30 of the upper floor building unit 10B is for connection with an air conditioning unit or the like installed in the back of the hut above the upper floor building unit 10B at the construction site. The connection end 60A is drawn out of the wall frame 31 and the lower end of the pipe 60 is a connection end 60B inserted into the floor frame 21 for connection with a branch connection member 70 described later. The connection ends 60A and 60B are stored in a bent state in the wall frame 31 and the floor frame 21 at the factory production stage of the upper floor building unit 10B.

  At this time, the ceiling panels 40 of the lower-floor building unit 10A and the upper-floor building unit 10B are preferably thin and have no structural strength as in the first embodiment.

Hereinafter, the construction procedure of the unit building 200 will be described.
(1) At the factory production stage of the upper floor building unit 10B, the pipes 50 are installed in the floor panel 20 and the pipes 60 are installed in the wall panel 30 as described above.

  Further, in the factory production stage of the lower floor building unit 10A, the ceiling panel 40 of the lower floor building unit 10A is attached to the ceiling surface material 42 only in a range excluding the region where the branch connection member 70 is disposed. A partition wall 33 is erected between the room A where the ceiling member 42 is attached and the room B where it is not attached (FIG. 9).

  The lower-floor building unit 10A and the upper-floor building unit 10B are transported to the building site.

  (2) Place the lower-floor building unit 10A on the foundation 1 of the construction site.

  (3) The upper floor building unit 10B is placed on the lower floor building unit 10A (FIG. 9).

  (4) Using the portion of the lower floor building unit 10A where the ceiling member 42 is not attached, the branch connection member 70 to be placed in the area of the lower floor building unit 10A is connected to the floor of the upper floor building unit 10B. It is attached to the lower surface of the panel 20. Then, the branch connection member 70 is branched and connected to the connection end 50 </ b> A of each pipe 50 and the connection end 60 </ b> B of the pipe 60.

  Note that the connection end 60A of the pipe 60 is drawn out from the upper frame material of the wall frame 31 in the wall panel 30 of the upper floor building unit 10B, and is installed in the back of the hut above the upper floor building unit 10B. Connected to.

  (5) The falling ceiling surface material 44 is attached to the area where the branch connection member 70 of the lower-floor building unit 10A is disposed, and the ceiling surface material 42 is not attached (FIG. 9).

  (6) The connection end 50B of each pipe 50 is drawn out from the insertion hole provided in each ceiling surface material 42, 44 to the side of the room A, B below the ceiling, and each room A, B is connected to the connection end 50B. An air supply grill 80 is connected. Thereafter, each supply grill 80 is attached to the lower surface of each ceiling member 42, 44.

Therefore, according to the present embodiment, the following operational effects can be obtained.
(a) In the upper-floor building unit 10B placed on the lower-floor building unit 10A, a pipe 50 extending in the horizontal direction in the floor panel 20 is attached at the factory.

  The piping 50 can be accommodated in the floor panel 20 of the upper-floor building unit 10B that becomes the ceiling behind the lower-floor building unit 10A. At this time, the ceiling of the lower-floor building unit 10A can be made thinner by not attaching the pipe 50 to the upper surface of the ceiling face material 42, and the indoor height of the ceiling can be increased.

  (b) In the upper-floor building unit 10B described in (a) above, a pipe 60 extending in the vertical direction along the wall panel 30 is further installed at the factory. In a system in which equipment is installed above the upper floor building unit 10B (attic etc.), the factory production rate can be increased by installing the pipe 60 connected to the equipment in the factory.

  (c) The upper-floor building unit 10B described above in (b) is placed on the lower-floor building unit 10A, and a pipe 60 extending in the vertical direction and a plurality of pipes 50 extending in the horizontal direction are branched and connected. A branch connection member 70 is provided in the area of the lower floor building unit 10A. It is possible to improve the local workability of the connection work of the pipes 50 and 60 extending from the upper side of the upper floor building unit 10B to a plurality of locations of the lower floor building unit 10A.

  The branch connection member 70 can be attached locally to the lower surface of the floor panel 20 of the upper floor building unit 10B. Or the branch connection member 70 can also be attached to the upper part of the wall panel 30 of 10 A of lower floor building units in a factory or the field.

  (d) After the branch connection member 70 of the above (c) is provided in the area of the lower floor building unit 10A, the ceiling surface material 44 is provided below the branch connection member 70 in the lower floor building unit 10A. The installation work of the branch connection member 70 in the area of the lower floor building unit 10 </ b> A and the on-site workability of the branch connection work of the pipe 50 using the branch connection member 70 can be improved.

  (e) By making the ceiling of the lower-floor building unit 10A described above (c) and (d) thin so as not to have structural strength, the indoor height of the ceiling can be reliably increased.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention. For example, the pipe 50 branched and connected to the branch connection member 70 provided in the area of the lower floor building unit 10A is in the floor panel 20 of the upper floor building unit 10B placed on the lower floor building unit 10A. The upper-floor building unit 10B mounted on the lower-floor building unit 10A is not limited to the one connected to the air supply grill 80 or the like that extends horizontally in the lower-floor building unit 10A. An air supply grill 80 extending in the horizontal direction in the floor panel 20 of another upper-floor building unit 10B adjacent from the floor panel 20 and attached to the other lower-floor building unit 10A adjacent to the lower-floor building unit 10A. It may be connected to the like.

  Further, the pipe 60 extending in the vertical direction along the wall panel 30 of the upper floor building unit 10 </ b> B is not limited to the inside of the wall panel 30, but may be provided in a pipe shaft provided along the wall panel 30. .

  In the present invention, in addition to the duct for ventilation / air conditioning equipment, a water supply / drain pipe, a refrigerant pipe for air conditioning, or the like may be applied as the pipe. Also, wiring such as power lines and information lines may be applied as the wiring. Moreover, those pipes, sheath pipes for wiring, etc. may be applied.

  According to the present invention, in an upper-floor building unit placed on a lower-floor building unit, piping or wiring extending in a horizontal direction is installed in a floor panel at a factory. As a result, the ceiling height of the ceiling can be increased while piping or wiring is placed behind the ceiling of the unit building.

10A Lower floor building unit 10B Upper floor building unit 20 Floor panel 21 Floor frame 21A Side joist (outer frame)
22 Flooring material 23 Connecting flooring material 30 Wall panel 31 Wall frame 40 Ceiling panel 42 Ceiling paneling 43 Connecting ceiling surface material 44 Falling ceiling surface material 50 Piping (piping or wiring)
50A Drawer end 51 Insertion hole 60 Pipe 70 Branch connection member

Claims (8)

  In the upper-floor building unit placed on the lower-floor building unit, the building unit is characterized in that piping or wiring extending in the horizontal direction is installed in the floor panel at the factory. Install the ceiling material except for the boundary between the two lower-floor building units, and place the two lower-floor building units next to each other.
The two upper floor building units according to claim 1 are respectively placed on the two lower floor building units,
After performing the connection work of piping or wiring between the two upper floor building units using the part where the ceiling surface material of the boundary between the two lower floor building units is not attached,
A construction method for a unit building, wherein a connecting ceiling surface material is attached to a boundary portion between the two lower-floor building units. A floor material is attached except for the boundary between the two upper-floor building units according to claim 1,
Place the two upper floor building units above the two lower floor building units,
After performing the connection work of piping or wiring between the two upper floor building units using the portion where the floor material at the boundary between the two upper floor building units is not attached,
A construction method for a unit building, wherein a connecting floor material is attached to a boundary portion between the two upper floor building units.   The construction method of the unit building of Claim 2 or 3 with which the connection of the said piping or wiring is made through the penetration hole provided in the outer periphery frame of a floor panel.   The building unit according to claim 1, wherein piping or wiring extending in a vertical direction along a wall panel of the building unit is attached at a factory.   A branch for placing the upper-floor building unit according to claim 5 on the lower-floor building unit and branching and connecting a pipe or wiring extending in the vertical direction and a plurality of pipes or wiring extending in the horizontal direction. A construction method for a unit building, characterized in that a connecting member is provided in a region of a lower-floor building unit.   The construction method of the unit building of Claim 6 which provides a ceiling surface material under the branch connection member in the said lower floor building unit.   The construction method of a unit building according to claim 2, 3, 4, 6, or 7, wherein a ceiling of the lower floor building unit is thin and has no structural strength.

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