JP6491534B2 - Thermal insulation structure of building - Google Patents

Description

  The present invention relates to a heat insulating structure of a building.

  In a building such as a house, a heat treatment is generally performed on the beam arranged along the outer periphery of the building so as to prevent the beam from becoming a thermal bridge. As such heat insulation treatment, Patent Document 1 discloses a configuration in which an in-beam heat insulating material made of glass wool is disposed on the inner side (groove portion) of a beam made of channel steel.

  However, in the above configuration, the upper and lower flange portions of the beam may still become a thermal bridge. In particular, since there is a room directly above the upper flange of the floor beam, the upper flange may become a thermal bridge, and outdoor heat may be transmitted to the room.

  Therefore, in Patent Document 1, as a countermeasure against this, a heat insulating material is separately provided on the outdoor side of the floor beam over the entire vertical direction of the floor beam. According to this, since it can cover with a heat insulating material including the upper flange of a floor beam from the outdoor side, it can suppress that an upper flange becomes a thermal bridge, and can suppress the fall of the heat insulation performance of a room as a result.

JP 2013-122116 A

  However, in the configuration of the above-mentioned Patent Document 1, the surrounding configuration is complicated due to the provision of a heat insulating material on the outdoor side of the floor beam. In other words, an outer wall surface material is usually attached to the outdoor side of the floor beam, or a ventilation layer is formed between it and the outer wall surface material. Is getting harder. Therefore, in patent document 1, in the site | part which provided the heat insulating material in the outdoor side of a floor beam, the external wall surface material of the external attachment was further provided in the position of the outdoor side rather than a normal outer wall surface material, and, thereby, a ventilation layer is ensured. It is doing. Thus, in the structure of patent document 1, since the structure is complicated when suppressing the fall of heat insulation performance, it is thought that there is still room for improvement in that respect.

  This invention is made | formed in view of the said situation, and makes it the main objective to provide the heat insulation structure of the building which can suppress the fall of heat insulation performance with a simple structure.

  In order to solve the above-mentioned problems, the heat insulating structure for a building according to the first aspect of the present invention comprises a section steel having a vertically extending web and upper flanges and lower flanges provided at both upper and lower ends of the web, along the outer periphery of the building. Applied to a building comprising: a floor beam provided on the floor beam; a joist provided on the upper flange of the floor beam along the floor beam; and a floor covering provided on the joist, An on-beam heat insulating material extending along the floor beam is disposed on the inner side of the building than the joist between the upper flange of the beam and the floor material.

  According to the present invention, the floor material is provided on the upper flange of the floor beam via the joist. And in such a structure, the heat insulation material on a beam is provided in the building inner side rather than the joist between the upper flange of a floor beam and a floor surface material. In this case, since the upper flange can be covered from above by the heat insulating material on the beam, it is possible to suppress outdoor heat from being transmitted to the upper side of the floor beam (upper flange) via the upper flange. That is, it is possible to suppress the outdoor heat from being transmitted to the space above the floor surface (residential space). Further, since the on-beam heat insulating material is disposed on the floor beam, unlike the case where the heat insulating material is provided on the outdoor side of the floor beam, it is possible to avoid a complicated configuration. Therefore, in this case, a decrease in heat insulation performance can be suppressed with a relatively simple configuration.

  In the heat insulation structure of a building according to a second invention, in the first invention, the floor beam is arranged with the flanges facing the inside of the building, and the heat insulating material on the beam is more than the upper flange. It has a protruding part that protrudes to the inside of the building, and the protruding part is a covering part that extends below the upper surface of the upper flange and covers the tip of the upper flange. It is characterized by.

  According to the present invention, in the heat insulating material on the beam, a part of the protruding portion (covering portion) that protrudes to the inside of the building from the upper flange extends downward from the upper flange to cover the flange tip. In this case, it is possible to suppress outdoor heat from being transmitted not only above the flange but also to the flange tip side via the upper flange. Therefore, the heat insulation performance can be further suppressed from decreasing.

  In the heat insulation structure of the building of the third invention, in the second invention, a heat insulating material in the beam is disposed in the groove portion surrounded by the web and the flanges in the floor beam, and the covering portion is It is provided in the state which contacted the said heat insulating material in a beam.

  According to the present invention, since the covering portion of the heat insulating material on the beam is provided in contact with the heat insulating material in the beam arranged in the groove portion of the floor beam, the heat insulating material on the beam and the heat insulating material in the beam are continuously connected. An insulated line can be formed. Thereby, the fall of heat insulation performance can further be suppressed.

  A heat insulating structure for a building according to a fourth invention is a unit constructed by connecting a plurality of building units having columns, ceiling beams and floor beams in any one of the first to third inventions. The floor joist is applied to the floor beam as the floor beam, the floor material is provided on the joist, the upper flange of the floor beam and the floor material The above-mentioned heat insulating material on the beam is disposed on the inner side of the building than the joist.

  In a unit type building in which a plurality of building units are connected to each other, each building unit is manufactured in advance at a manufacturing factory, thereby greatly reducing the number of man-hours at the construction site. Therefore, in the present invention, in such a unit type building, the heat insulating structure of the present invention is applied to the floor beams of the building unit. In other words, the on-beam heat insulating material is disposed between the upper flange of the large floor beam and the floor surface material. For example, in a unit-type building, when heat insulation is provided on the outdoor side of a floor girder, it is thought that heat insulation will be provided at the construction site, but in that case, the unit type building that greatly reduces man-hours at the site Benefits may be compromised. In that respect, according to the above-described configuration, it is possible to incorporate a heat insulating material (heat insulating material on a beam) in a building unit in a manufacturing factory, and therefore, a decrease in heat insulating performance is suppressed without increasing the number of man-hours on site. be able to.

  In the heat insulation structure of a building according to a fifth aspect of the present invention, in the fourth aspect of the invention, a plurality of floor beams are provided between the pair of opposed floor beams to connect the floor beams. The joists are provided on the floor beams to which beams are connected, and the upper surface of the joists and the upper surfaces of the respective beam beams are set at the same height position. The floor material is provided across the upper surface of the beam, and the beam heat insulating material is provided for the large beam to which the floor beam is connected. It is arrange | positioned through between the joist and the edge part of the said floor beam.

  According to the present invention, the on-beam heat insulating material is provided for the large floor beam to which the floor beam is connected, and the on-beam heat insulating material is disposed between the joist and the end of the floor beam. ing. In this case, it is possible to suppress outdoor heat from being transmitted to the floor beam via the upper flange of the large floor beam, so that it is possible to further suppress the deterioration of the heat insulation performance. In addition, since it is possible to hold the thermal insulation on the beam between the joist and the floor beam, the thermal insulation on the beam is fixed in such a holding state when performing the work of fixing the thermal insulation on the beam to the joist etc. It becomes possible. For this reason, it is possible to facilitate such fixing work.

The cross-sectional view which shows the structure of a floor part. (A) is the sectional view on the AA line of FIG. 1, (b) is the sectional view on the BB line of FIG. The perspective view which shows the outline | summary of a unit type building. The perspective view which shows a building unit.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The building of the present embodiment is a unit type building constructed by combining a plurality of building units. FIG. 3 is a perspective view showing an outline of the unit type building, and FIG. 4 is a perspective view showing the building unit.

  As shown in FIG. 3, a building 10 such as a house includes a building main body 12 provided on a foundation 11 and a roof 13 provided on the building main body 12. The building 10 is a two-story building, and has a first floor part 14 and a second floor part 15. The building body 12 is configured by connecting a plurality of building units 20 to each other.

  As shown in FIG. 4, the building unit 20 includes four columns 21 disposed at the four corners thereof, and four ceiling beams 22 and floor beams 23 that connect the upper and lower ends of each column 21, respectively. And. A rectangular frame (frame) is formed by the pillars 21, the ceiling beams 22 and the floor beams 23. The column 21 is made of square tubular square steel, and the ceiling girder 22 and floor girder 23 are made of channel steel having a U-shaped cross section.

  A plurality of small ceiling beams 25 are bridged between the large ceiling beams 22 on the long sides of the building unit 20 at predetermined intervals. Similarly, a plurality of floor beams 26 are bridged at predetermined intervals between the opposing large floor beams 23 on the long sides of the building unit 20. The ceiling beam 25 and the floor beam 26 are provided at the same interval and at positions corresponding to the upper and lower sides, respectively. For example, the ceiling beam 25 is made of lip groove steel, and the floor beam 26 is made of square steel. The ceiling member 27 is supported by the ceiling beam 25 and the floor member 28 is supported by the floor beam 26.

  Next, the structure of the floor part in the second floor part 15 of the building 10 will be described. FIG. 1 is a cross-sectional view showing the configuration of the floor portion. 2A is a cross-sectional view taken along line AA in FIG. 1, and FIG. 2B is a cross-sectional view taken along line BB in FIG.

  As shown in FIG. 1, a floor girder 23 is provided on the outer periphery of the floor of a building unit 20 constituting the second floor portion 15 in the building 10. In FIG. 1, two floor beams 23 orthogonal to each other are shown as the floor beams 23, and both of these floor beams 23 are arranged adjacent to each other outdoors. That is, all of these floor beams 23 are arranged along the outer periphery of the building 10.

  The floor girder 23 is made of channel steel as described above. That is, as shown in FIGS. 2A and 2B, the floor girder 23 has a web 23a extending in the vertical direction, and an upper flange 23b and a lower flange 23c provided at both upper and lower ends of the web 23a. . The inner side surrounded by the web 23a and the flanges 23b and 23c in the floor girder 23 is a groove 23d. The floor girder 23 is arranged with the groove 23d facing inward in the horizontal direction of the building unit 20 (in other words, toward the underfloor space 36 described later).

  As described above, a plurality of floor beams 26 are bridged between the opposing large floor beams 23 of the long side portion of the building unit 20. These floor beams 26 are connected to the floor beams 23 via brackets 31 at both ends in the longitudinal direction. A pair of brackets 31 are provided on both sides of the floor beam 26 in the groove 23 d of the floor beam 23. The bracket 31 is formed of a steel plate, and includes a vertical plate portion 31 a fixed to the side surface of the floor beam 26 and a pair of flange portions 31 b fixed to the flanges 23 b and 23 c of the floor large beam 23.

  The floor beam 26 is connected to the floor beam 23 in a state in which a part thereof protrudes upward from the floor beam 23. Therefore, the upper surface of the floor beam 26 is located higher than the upper surface of the floor beam 23 (upper flange 23b). The floor beam 26 is connected to the floor beam 23 with a predetermined gap between the end of the beam beam and the floor beam 23 (specifically, the upper flange 23b).

  A joist 33 is provided on the upper surface of the floor girder 23 (specifically, the upper flange 23b). The joist 33 is made of wooden timber. The joist 33 is disposed along the floor beam 23 and is fixed to the floor beam 23 with a nail or the like. The upper surface of the joist 33 is set at the same height as the upper surface of each floor beam 26. On the joists 33 and the upper surfaces of the floor beams 26, a floor material 28 made of particle board is provided. The floor material 28 is fixed to the floor girder 23 via a joist 33 with nails 34. Although illustration is omitted, a floor finishing material is laid on the upper surface of the floor material 28, and the floor surface of the living room 29 of the second floor portion 15 is formed by the floor finishing material.

  A floor space 36 is formed below the floor material 28. The underfloor space 36 is an inner space surrounded by the floor beams 23. In this case, since the underfloor space 36 is formed in the interstory portion between the first floor portion 14 and the second floor portion 15, the underfloor space 36 can also be referred to as an interfloor space. The underfloor space 36 is formed between the floor surface material 28 of the second floor portion 15 and the ceiling surface material 27 of the first floor portion 14.

  The living room 29 is partitioned from the outside by an outer wall portion 37. The outer wall portion 37 includes an outer wall surface material 38 facing the outdoors and an inner wall surface material 39 facing the living room 29. The outer wall surface member 38 is fixed to the floor girder 23 (specifically, the web 23a) via a base frame 41 provided on the back side thereof. Also, an in-wall heat insulating material 42 made of glass wool is provided between the outer wall surface material 38 and the inner wall surface material 39. In FIG. 1, the outer wall portion 37 is not shown for convenience.

  2A and 2B, the ceiling beam 22 is provided below the floor beam 23 of the second floor portion 15 on the ceiling portion of the building unit 20 constituting the first floor portion 14. FIG. Is provided. The ceiling girder 22 is disposed along the floor girder 23, and the groove 22a thereof is disposed toward the underfloor space 36 side. An outer wall surface member 38 is fixed to the web of the ceiling girder 22 via a base frame 41, and the outer wall surface member 38 is arranged side by side with the outer wall surface member 38 of the second floor portion 15. In addition, a decorative body difference 43 is provided at a boundary portion between the outer wall surfaces 38 arranged vertically.

  Next, the heat insulation structure around the floor of the second floor portion 15 will be described.

  In the floor portion of the second floor portion 15, an in-beam heat insulating material 45 is provided in the groove portion 23 d of the floor girder 23. The in-beam heat insulating material 45 is made of glass wool as a fiber heat insulating material. The in-beam heat insulating material 45 is formed in a long shape along the floor girder 23 and is disposed so as to fill the groove 23 d of the floor girder 23.

  Further, in the ceiling portion of the first floor portion 14, an in-beam heat insulating material 46 is provided in the groove portion 22 a of the ceiling beam 22. The in-beam heat insulating material 46 is made of glass wool as a fiber heat insulating material. The in-beam heat insulating material 46 is formed in a long shape along the ceiling girder 22 and is disposed so as to fill the groove 22 a of the ceiling girder 22.

  An inter-beam heat insulating material 47 is provided in a gap between the ceiling beam 22 of the first floor portion 14 and the floor beam 23 of the second floor portion 15 (gap between beams). The inter-beam heat insulating material 47 is made of glass wool as a fiber heat insulating material. The inter-beam heat insulating material 47 is formed in a long shape along each of the large beams 22 and 23, and is provided in a state of being sandwiched between the large beams 22 and 23.

  Here, as described above, the in-beam heat insulating material 45 is provided in the floor large beam 23 of the second floor portion 15, but the in-beam heat insulating material 45 is disposed in the groove portion 23 d of the floor large beam 23. In this case, for example, the upper flange 23b may become a thermal bridge. In view of this point, the present embodiment further includes a configuration for suppressing such a thermal bridge. The configuration will be described below.

  As shown in FIG. 1, on-floor heat beams 48 and 49 are provided on the respective floor beams 23 arranged along the outer periphery of the building in the second floor portion 15. In this case, the long-side floor girder 23 (hereinafter referred to as “A”) is provided with a thermal insulation material 48 on each of the floor girder 23, and the short-side floor girder 23 (hereinafter referred to as this symbol). B) is provided with an on-beam heat insulating material 49. Each of these on-beam heat insulating materials 48 and 49 is made of glass wool as a fiber heat insulating material. Each of the on-beam heat insulating materials 48 and 49 is formed in a long shape, the on-beam heat insulating material 48 is disposed along the floor large beam 23A, and the on-beam heat insulating material 49 is disposed along the floor large beam 23B. Has been.

  As shown in FIGS. 1 and 2A, the on-beam heat insulating material 48 is sandwiched between the upper flange 23 b of the large floor beam 23 </ b> A and the floor surface material 28 on the underfloor space 36 side of the joist 33. Is provided. The on-beam heat insulating material 48 is fixed to the side surface of the joist 33 using a tucker in such a sandwiched state.

  The on-beam heat insulating material 48 includes a sandwiching portion 48a sandwiched between the upper flange 23b and the floor surface material 28, and a protruding portion 48b that protrudes from the upper flange 23b to the underfloor space 36 side (opposite to the outdoor side). And have. The sandwiching portion 48a is disposed in contact with the upper surface of the upper flange 23b, the lower surface of the floor material 28, and the side surface of the joist 33. In this case, the under floor space 36 side is covered from above by the sandwiching portion 48a rather than the joist 33 in the upper flange 23b.

  A part of the protruding portion 48b extends downward from the upper surface of the upper flange 23b to form an extending portion 48c. In this case, the tip of the upper flange 23b is covered from the underfloor space 36 side by the extending portion 48c. Further, the extending part 48 c is arranged in contact with the in-beam heat insulating material 45. Therefore, a continuous heat insulation line is formed by the on-beam heat insulating material 48 and the in-beam heat insulating material 45. The extended portion 48c corresponds to a cover portion.

  As shown in FIGS. 1 and 2 (b), the on-beam heat insulating material 48 passes through between the side surface of the joist 33 and the end of the floor beam 26 at the connecting portion of the floor beam to the floor beam 26A. It is arranged. In this case, in the connection part, the on-beam heat insulating material 48 is disposed through an inner region surrounded by the upper flange 23b, the joist 33, the floor surface material 28, and the end portion of the floor small beam 26. Thereby, the arrangement portion is compressed by these members 23b, 26, 28, 33.

  The on-beam heat insulating material 49 is disposed on the floor large beam 23 </ b> B with the same configuration as the above-mentioned on-beam heat insulating material 48. That is, the on-beam heat insulating material 49 is provided in a state of being sandwiched between the upper flange 23b of the large floor beam 23B and the floor surface material 28 on the underfloor space 36 side of the joist 33. In addition, the on-beam heat insulating material 49 is fixed to the side surface of the joist 33 using such a tucker in such an arrangement state. The on-beam heat insulating material 49 is in contact with the on-beam heat insulating material 48 at the end thereof, and a continuous heat insulating line is formed by these on-beam heat insulating materials 48 and 49.

  The on-beam heat insulating material 49 includes a sandwiching portion 49a sandwiched between the upper flange 23b and the floor surface material 28, and a protruding portion 49b that protrudes toward the underfloor space 36 from the upper flange 23b. A part of the protruding portion 49b is an extending portion (not shown) extending downward from the upper surface of the upper flange 23b, and the upper flange 23b is covered by the extending portion (corresponding to a covering portion). ing. Further, the extending portion is in contact with the in-beam heat insulating material 45 disposed in the groove portion 23d of the large floor beam 23B.

  Next, an operation procedure for constructing the above-described heat insulating structure will be described. Here, in particular, a procedure for constructing a heat insulating structure on the floor of the building unit 20 of the second floor portion 15 will be described.

  In the unit manufacturing factory, first, each building unit 20 constituting the building 10 is manufactured. When manufacturing the floor of the building unit 20 on the second floor portion 15, first, the joist 33 is installed and fixed on the floor beams 23 </ b> A and 23 </ b> B of the building unit 20. Then, the work which arrange | positions the heat insulating material 45 in a beam to the groove part 23d of each floor big beam 23A, 23B is performed.

  Next, the work which fixes the heat insulation materials 48 and 49 on a beam to the side surface of the joist 33 using a tucker is performed. At this time, the heat insulating material 48 on the beam is first disposed in a state where the heat insulating material 48 is passed between the joist 33 and the end portion of the floor beam 26, and fixing work is performed in the disposed state. Therefore, the on-beam heat insulating material 48 can be fixed while the heat insulating material 48 is held between the joists 33 and the floor beam 26.

  Next, an operation of installing the floor material 28 on the upper surface of the joist 33 and the upper surface of each floor beam 26 is performed. By this installation work, the on-beam heat insulating materials 48 and 49 are sandwiched between the upper flanges 23b of the large floor beams 23A and 23B and the floor surface material 28. The portions other than the sandwiched portions 48a and 49a, that is, the projecting portions 48b and 49b that project from the upper flange 23b to the underfloor space 36 side, extend partially below the upper flange 23b and extend. Part 48c.

  The heat insulation structure in the floor part of the building unit 20 is constructed as described above. Thus, in this embodiment, the heat insulation structure of a floor part is constructed in a unit manufacturing factory.

  After each building unit 20 is manufactured, each building unit 20 is transported to a construction site by a truck or the like. At the construction site, the building units 20 are installed at predetermined positions, and the installed building units 20 are connected to each other. Thereby, the building 10 is completed.

  As mentioned above, according to the structure of this embodiment explained in full detail, the following outstanding effects are acquired.

  On-beam heat insulating materials 48 and 49 are provided between the upper flanges 23b of the large floor beams 23A and 23B and the floor surface material 28 on the underfloor space 36 side (in other words, on the inside of the building) with respect to the joists 33. In this case, since the upper flange 23b can be covered from above by the beam heat insulating materials 48 and 49, it is possible to suppress the outdoor heat from being transmitted to the upper floor beams 23A and 23B (upper flange 23b) via the upper flange 23b. be able to. That is, it is possible to suppress outdoor heat from being transmitted to the room 29 above the floor material 28. In addition, since the on-beam heat insulating materials 48 and 49 are disposed on the floor large beams 23A and 23B, unlike the case where the heat insulating material is provided on the outdoor side of the floor large beams 23A and 23B, the configuration is prevented from becoming complicated. can do. Therefore, in this case, a decrease in heat insulation performance can be suppressed with a relatively simple configuration.

  The beam heat insulating materials 48 and 49 are provided with a protruding portion 48b that protrudes toward the underfloor space 36 from the upper flange 23b, and a part of the protruding portion 48b extends downward from the upper surface of the upper flange 23b. The end portion of the upper flange 23b was covered with the extended portion 48c. In this case, it is possible to suppress the outdoor heat from being transmitted not only to the upper side of the flange 23b but also to the front end side of the flange 23b via the upper flange 23b. Therefore, the heat insulation performance can be further suppressed from decreasing.

  Since the extended portion 48c is brought into contact with the in-beam heat insulating material 45 disposed in the groove portion 23d of the large floor beams 23A and 23B, a continuous heat insulating line is formed by the on-beam heat insulating materials 48 and 48 and the in-beam heat insulating material 45. Can do. Thereby, the fall of heat insulation performance can further be suppressed.

  The above heat insulating structure using the heat insulating materials 48 and 49 on the beams was applied to the large floor beams 23A and 23B of the building unit 20 constituting the unit type building. In a unit type building, when heat insulating material is provided on the outdoor side of the floor beam 23, it is considered that heat insulating material is provided at the construction site. In that case, the advantage of the unit type building that greatly reduces the man-hours at the site is There is a risk of damage. In that respect, if the above heat insulating structure is adopted, it is possible to incorporate the heat insulating materials (on-beam heat insulating materials 48 and 49) into the building unit 20 in the manufacturing factory, and thus heat insulation without increasing the number of man-hours on site. A decrease in performance can be suppressed.

  An on-beam heat insulating material 48 is provided on the long side floor large beam 23A to which the floor small beam 26 is connected, and the on-beam heat insulating material 48 is disposed between the joist 33 and the end of the floor small beam 26. In this case, since outdoor heat can be prevented from being transmitted to the floor beam 26 via the upper flange 23b of the large floor beam 23A, it is possible to further suppress a decrease in heat insulation performance. Further, since the on-beam heat insulating material 48 can be held between the joist 33 and the floor beam 26, the on-beam heat insulating material 48 is held when the on-beam heat insulating material 48 is fixed to the joist 33. It becomes possible to fix in a state. For this reason, it is possible to facilitate such fixing work.

  The present invention is not limited to the above embodiment, and may be implemented as follows, for example.

  In the above embodiment, the extended portions 48 c of the on-beam heat insulating materials 48 and 49 are arranged in contact with the in-beam heat insulating material 45, but they may be arranged without being in contact with the in-beam heat insulating material 45. Moreover, you may make it not provide the extension part 48c in the heat insulation materials 48 and 49 on a beam.

  In the embodiment described above, the on-beam heat insulating materials 48 and 49 are provided for the large floor beam 23 (corresponding to the floor beam) made of channel steel, but the floor beam has other shapes having a web and upper and lower flanges. Even when it is made of steel, an on-beam heat insulating material can be provided for the floor beam. Examples of such shaped steel include I-shaped steel and H-shaped steel.

  In the above embodiment, glass wool (fiber-based heat insulating material) is used as the on-beam heat insulating materials 48 and 49, but other fiber heat insulating materials such as rock wool and cellulose fiber may be used. In addition, as the on-beam heat insulating materials 48 and 49, it is also possible to use foamed heat insulating materials such as foamed polyethylene.

  In the above embodiment, the on-beam heat insulating materials 48 and 49 are provided on the large floor beam 23 of the second floor portion 15, but the on-beam heat insulating materials 48 and 49 may be provided on the large floor beam 23 of the first floor portion 14.

  -In the above-mentioned embodiment, although the example of application to a unit type building was explained, the present invention is applicable also to buildings of other structures, such as a building constructed by a steel frame assembly method.

  DESCRIPTION OF SYMBOLS 10 ... Building, 20 ... Building unit, 23A, 23B ... Floor large beam as floor beam, 23a ... Web, 23b ... Upper flange, 23c ... Lower flange, 23d ... Groove, 26 ... Floor beam, 28 ... Floor material, 33 ... joists, 45 ... heat insulating material in the beam, 48 ... heat insulating material on the beam, 48b ... protruding portion, 48c ... extending portion as a covering portion, 49 ... heat insulating material on the beam, 49b ... protruding portion.

Claims (3)

Built by connecting multiple building units with pillars, ceiling beams and floor beams,
The floor girder is made of a shape steel having a web extending vertically and an upper flange and a lower flange provided at both upper and lower ends of the web.
Between the pair of facing floor beams in the building unit, a plurality of floor beams are provided to connect the floor beams.
Of the pair of floor beams, the floor beam provided along the outer periphery of the building is the outer floor beam.
Joist along the outer peripheral side floor girder is provided on the upper flange of the outer peripheral side floor girders,
The upper surface of the joists and the upper surface of each floor beam are set at the same height position,
Applied to unit buildings where flooring material is provided across the joists and the upper surface of each floor beam ,
Wherein the building interior side with respect to the joists between the outer peripheral side floor girders the top flange of the floor material, and the beam on the heat insulating material extending along the outer peripheral side floor girder is provided,
The heat insulating structure for a building , wherein the heat insulating material on the beam is disposed between the joist and an end portion of the floor beam . The outer perimeter floor beams are arranged with the flanges facing the building interior side,
The heat insulating material on the beam has a protruding portion that protrudes to the inside of the building from the upper flange,
2. The heat insulating structure for a building according to claim 1, wherein a part of the protruding portion extends below the upper surface of the upper flange and covers a tip of the upper flange. In the outer periphery side floor beam , a heat insulating material in the beam is disposed in the groove portion surrounded by the web and the flanges,
The said cover part is provided in the state which contacted the said heat insulating material in a beam, The heat insulation structure of the building of Claim 2 characterized by the above-mentioned.

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