JP4159091B2 - Partition wall structure - Google Patents

Description

  The present invention relates to a partition wall structure for a dry construction method, and more particularly to a partition wall structure for a dry construction method having a construction in which building interior board materials for forming wall surfaces are attached to both sides of a shaft assembly. .

  As a partition wall of a building or a workpiece, a so-called frame structure lightweight steel partition wall in which a building interior board material such as gypsum board or calcium silicate board is attached to a stud stud made of steel is widely used practically. . In this type of partition wall structure, the steel studs are aligned at equal intervals along the wall core, and the upper and lower ends of the steel stud engage the ceiling runner and the floor runner, respectively. On both sides of the steel stud, an interior board material for construction is fixed, and a wall surface of the interior board material is formed in each chamber. In this kind of partition wall structure, a thin slatted plate such as rock wool or glass wool is inserted between the steel stud and the interior board material, and the impact or vibration acting on the interior board material is the steel stud. There is known one configured to prevent transmission to Japanese Patent Laid-Open No. 6-42078.

  As another type of partition wall structure, a partition wall having a non-stud structure or a studless structure in which the studs of steel studs are omitted is known in order to improve sound insulation performance and workability of the partition wall. For example, the partition wall disclosed in Japanese Patent Publication No. 62-9701 is substantially composed of an interior board material of each wall surface fixed to a ceiling runner and a floor runner, and a core material disposed in a hollow portion of the partition wall. The The core material that functions as a kind of stud is bonded to the board material via an inorganic adhesive, and a gap is formed between the board material and the core material. Further, as other types of non-stud structure partition walls, for example, as disclosed in JP-A-7-324410 and JP-A-9-4096, reinforcing ribs extending in the vertical direction are used as laminates of board pieces, etc. Is previously formed integrally with the interior board material and the board material is attached to the ceiling runner and floor runner.

The inventors of the present invention have developed a partition wall having a structure in which a reinforcing plate and an adhesive lump are interposed between an underboard and an upper board with respect to such a dry construction method and a studless structure partition wall. In addition, a partition wall structure in which the surface density or mass distribution of the wall surface is changed to improve the sound insulation performance in the low frequency band has already been proposed (Japanese Patent Application Laid-Open No. 2002-33058). -213038).
JP-A-6-42078 Japanese Patent Publication No.62-9701 JP 7-324410 A JP-A-9-4096 No. 6-33058 JP 2002-213038 A

  In the conventional partition structure partition wall, there is a limit in the support interval of the face material (interior board material), so the steel studs are arranged in the wall at intervals of about 450 mm or 600 mm, and the hollow portion in the wall Is divided by steel studs. For this reason, heat insulating and sound absorbing materials such as glass wool must be inserted or filled in each section in the wall divided by the stud, and this operation is inefficient and very easy to work. bad. A face material for forming a wall surface of each chamber is fixed to both side faces of each stud by screws or board screws. The operation of fixing the edge of the face material to the stud with a screw or a board screw is also quite inefficient, the workability is poor, and the face material edge is easily damaged. Further, it is known that the stud and the face material around the stud form a noise bridge and a heat bridge that conduct noise and heat in a solid state, and become a weak point that deteriorates the sound insulation performance and heat insulation performance of the partition wall. On the other hand, in the above construction method (Patent Document 1) in which a thin siding plate is inserted between the stud and the face material, the sound and heat bridge effect is reduced to a certain extent due to the sound insulation and heat insulating properties of the siding plate. May be able to alleviate. However, since the face material is fixed to the stud by a board screw or the like, and the siding plate is compressed and consolidated between the stud and the face material, the action naturally has a limit. Moreover, the tightening force of the board screws or the like acting on the edges of the adjacent left and right face members is not necessarily equal, and therefore, there is a difference in the compression state of the siding plate, so the vertical joint on the siding plate A step is likely to occur in the portion.

  On the other hand, in the partition wall of the non-stud structure, since the space in the wall is continuous, the workability of the heat insulating and sound absorbing material is improved, and no sound or heat bridging effect is produced. However, as the stud is omitted, the wall strength decreases. Although this can be improved considerably by reinforcing the face material (ribs, etc.), there is a limit to securing the wall strength depending on the reinforcement of the face material. There is a limit, and the impact resistance of the wall surface is naturally limited.

  Further, when considering the prevention and fire resistance of the partition wall, the joint portion tends to be a weak point in the partition wall of any structure. That is, in the partition wall of the shaft structure, the temperature of the steel stud located behind the vertical joint is likely to increase, and the deformation or damage of the wall body is likely to occur due to the metal temperature increase of the stud and the thermal stress deformation. In a non-stud structure partition wall, there are no studs behind the vertical joint, so if a gap, gap or chipping occurs in the vertical joint due to thermal deformation, etc., there is a concern that a high hot air current may blow through the gap. is there.

  The present invention has been made in view of such circumstances. The purpose of the present invention is to improve the workability of the face material mounting work, improve the workability of the heat insulating / sound absorbing material, and bridge the sound and heat. An object of the present invention is to provide a partition wall structure capable of solving the problem, improving the wall strength, and further improving the anti-fire and fire resistance.

In order to achieve the above-mentioned object, the present invention is an upper and lower metal runners (2 , 3), and upper and lower runners (2, 3) having upper end portions and lower end portions respectively inserted therein, and a metal that frictionally engages the runners In the partition wall structure of the dry construction method having a configuration in which a shaft assembly is formed with the stud (4) made and the interior board material for building forming the wall surface is attached to both surfaces of the shaft assembly,
The stud center is aligned with the wall core position, and the stud of the first stud row arranged at the vertical joint position (29) of the interior board material (20) on the side of the first chamber, and the stud center is aligned with the wall core position. The studs of the second stud row respectively arranged at the vertical joint positions (29) of the interior board material (20) on the side surface of the second chamber and the side of the first chamber of the stud constituting the first stud row are fixed. The vertical strip (14), the vertical strip (14) fixed only to the side surface of the second chamber of the stud constituting the second stud row, and the runner are disposed along both side surfaces of the runner. A horizontal strip (12, 13) fixed to the upper end or lower end of the stud;
A vertical intermediate strip (23, 24) is fixed to the center of the back surface of the interior board material, and metal members (25, 26) having a smaller cross section than the stud are fixed to the intermediate strip. The intermediate strip and the metal member form a continuous rib perpendicular to the center of the back surface of the interior board,
The vertical strip, the horizontal strip and the intermediate strip are made of cut pieces of interior board material, and the vertical strip, the horizontal strip and the intermediate strip arranged on the same chamber side have the same thickness. The partition wall structure is characterized by forming a board support surface to which the interior board material (20) can be fixed .

  According to the above configuration of the present invention, the wall surfaces of the first chamber and the second chamber located on each side of the partition wall are supported by the first row stud (4A) and the second row stud (4B), respectively. This support method is the same as the conventional staggered stud or double stud type light iron partition wall, but in the present invention, the stud centers in the first and second rows are both arranged at the wall core position. Is very different. A vertical strip made of a cut piece of interior board material is fixed to the first chamber side surface of the first row stud and the second chamber side surface of the second stud row. The vertical band plate separates the side surface of the stud from the interior board material of the wall surface. Since the horizontal strips arranged on both sides of the runner are located between the runner and the interior board material, the support of the interior board material is stable. Since the horizontal strip is fixed to the stud, the interlayer deformability of the partition wall is not impaired.

  Since the center part of the strip is fixed to the stud, the strip is hardly damaged. Even if the edge of the band plate is missing or damaged at the time of fixing, the band plate is concealed in the partition wall, so that no particular trouble occurs. The interior board material is not fixed directly to the studs, and therefore the interior board material can be fixed to the strip with staples and / or adhesives, thus significantly improving the workability of the faceplate attachment operation.

  Since the vertical strip is disposed only on one side of the stud, a space corresponding to the thickness of the strip is formed between the opposite side of the stud and the interior board material. The section between the studs divided by the stud is continued by this space. For this reason, it is possible to fill or insert a continuous heat-insulating / sound-absorbing material having a relatively wide area into the wall, and the workability of the heat-insulating / sound-absorbing material is improved. At the same time, the space formed between the stud and the interior board material reliably prevents sound and heat bridging effects.

  An intermediate strip (23, 24) is fixed to the center of the rear surface of the interior board material, and metal members (25, 26) having a relatively small cross section are fixed to the intermediate strip. After fixing the intermediate strip to the metal member with screws or screws, the intermediate strip can be fixed to the back surface of the board with a stable and / or adhesive. Since the intermediate strip and the metal member form vertical ribs that reinforce the central portion of the interior board material, the studs need only be arranged at positions corresponding to the longitudinal joints of the interior board material. Therefore, the stud interval of the stud row that supports each wall surface can be set to the board width of each wall surface, for example, 900 mm interval.

  The material of the interior board material is relatively light specific gravity and low strength, whereas the metal member has high specific gravity and strength. Therefore, the area between the studs of the board material is reinforced by vertical ribs, the coincidence effect is eliminated by the difference in specific gravity between the board material and the metal member, and vibration transmission (noise transmission) is performed by the vibration suppression effect due to the mass change in the board central area. ) Can be effectively prevented.

  In addition, since the vertical strip and the horizontal strip are arranged as backing materials on both side edges and the baseboard portion (and the top of the wall) of the interior board material that is relatively easily damaged or deformed by external force, the interior board The material is totally reinforced.

  These strips also prevent the studs and runners from being heated in the event of a fire, and prevent gaps and the like from occurring in the vertical joints, lower edge and upper edge. For this reason, the barrier / fireproof performance of the partition wall is improved.

  According to the present invention, the workability improvement of the face material mounting work, the workability improvement of the heat insulating and sound absorbing material, the elimination of the sound and heat bridge effect, the improvement of the wall surface strength, and further the improvement of the fireproofing and fireproof performance. It is possible to provide a partition wall structure that can be used.

  According to a preferred embodiment of the present invention, the interior board material (20) is divided into a lower board and an upper board, and an intermediate strip (23, 24) and a metal member are provided at the center of the back surface of each board. (25, 26) are fixed, and the intermediate strip and the metal member form continuous ribs when the lower and upper boards are connected vertically.

  According to a further preferred embodiment of the present invention, the stud interval of the first stud row and the stud interval of the second stud row are set to the same dimension S, and each stud row is displaced in the direction of the wall core by S / 4. The stud and the metal member are arranged at equal intervals (S / 4) in the wall core direction.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view of a partition wall according to an embodiment of the present invention, and FIGS. 2 and 3 are a longitudinal sectional view and a transverse sectional view of the partition wall shown in FIG.

  The partition wall W shown in FIGS. 1 to 3 includes a floor runner 2 and a ceiling runner 3 made of lightweight steel. The wall thickness D1 (FIGS. 2 and 3) of the partition wall W is set to 100 to 150 mm, for example, 125 mm. The floor runner 2 is disposed on a floor base F such as a concrete slab or a floor mortar base, and extends on the floor Fa in the wall core direction. The floor runner 2 is fixed to the floor base F by a fixing tool (not shown) such as a driving pin disposed at an interval of about 900 mm. The ceiling runner 3 is fixed to a ceiling base C such as a lightweight steel ceiling base material or an upper floor concrete slab by fixing means (not shown) such as welding, a tapping screw or an anchor. The ceiling runner 3 faces the floor runner 2 and extends to the ceiling base surface Ca in the wall core direction. The runners 2 and 3 are formed of a grooved lightweight steel frame member having a width D2 = about 50 mm (FIGS. 2 and 3).

  A lightweight steel frame stud 4 is erected vertically between the upper and lower runners 2 and 3. The stud 4 is made of a channel-type lightweight steel member having a width of about 50 mm. The upper end portion and the lower end portion of each stud 4 are inserted into the grooves of the runners 2 and 3 and frictionally engaged with the runners 2 and 3. The runners 2 and 3 and the stud 4 constitute a steel wall base. If desired, a scraping noise preventing means, a vibration-preventing member, and the like are disposed at appropriate positions on the steel wall base.

  As shown in FIG. 3, the stud 4 is classified into a first stud row stud 4 </ b> A that supports one side wall surface and a second stud row stud 4 </ b> B that supports the opposite wall surface. The studs 4A: 4B are arranged with a stud interval S therebetween, and each stud row is arranged in a state in which the phase is shifted in the wall core direction by S / 4.

  As shown in FIG. 1, horizontal strips 12 and 13 are disposed on both side surfaces of the runners 2 and 3, and a vertical strip 14 is attached to one side of the stud 4. Each of the strips 12, 13, and 14 is made of a cut piece of interior board material, and in this example, is made of a plaster board piece having a plate thickness of 15 mm. The width of the horizontal strips 12 and 13 is set within a range of about 75 to 150 mm, for example, 100 mm, and the width of the vertical strip 14 is set to 50 to 120 mm, for example, 90 mm.

  FIG.4 and FIG.5 is the front view and perspective view which show the construction process of the steel wall base.

  FIG. 4 (A) shows the process of installing the steel wall base, and FIG. 4 (B) shows the process of attaching the strips 12, 13, and 14.

  As shown in FIG. 4A, the studs 4A in the first stud row are aligned and arranged at the wall core positions with a predetermined mutual interval S therebetween. Similarly, the studs 4B (shown by broken lines) in the second stud row are also aligned and arranged at the wall core positions with a predetermined mutual interval S therebetween. As shown in FIG. 4B, the vertical strip 14 is fixed to the outer surface of the flange portion of the stud 4 by a locking tool 15 such as a tapping screw. In this example, the vertical strip 14 is divided into upper and lower portions, and a butt joint 16 is formed at the joint between the upper and lower strip portions 14a and 14b. The butting joint 16 is disposed at a position relatively close to the ceiling surface Fa. Both end portions of the upper and lower horizontal strips 12 and 13 are fixed to the upper end portion and the lower end portion of the stud 4 by the locking tool 15. The horizontal strips 12 and 13 are not fixed to the upper and lower runners 2 and 3, and the runners 2 and 3 and the horizontal strips 12 and 13 maintain a relatively displaceable state. In addition, you may use a locking tool and an adhesive agent for attachment of the strips 12, 13, and 14 with respect to the stud 4. FIG.

  FIG. 5 shows a steel wall substrate that has completed the erection process in this way. The surface of the strips 12, 13, and 14 is located on the indoor side surface of the steel wall base. The studs 4A: 4B in the first and second stud rows are both arranged at the wall core position, but do not completely divide the inner wall region, and the inner wall region is exposed to the stud 4 as shown in FIG. It continues by the space 6 formed in the side. A heat insulating / sound absorbing material 5 such as glass wool is disposed in the in-wall region. Since each section between the studs 4 is continuous through the space 6, the heat insulating / sound absorbing material 5 can be arranged in the in-wall region without being cut.

  FIG. 6 is a perspective view showing the structure of the underlay board member 20 attached to the steel wall base.

  The underlay board material 20 is divided into a lower board 21 and an upper board 22, and intermediate strips 23 and 24 are arranged on the back surfaces of the boards 21 and 22. The boards 21 and 22 are made of, for example, a gypsum board having a thickness of 15 mm. Vertical members 25 and 26 made of a lightweight steel frame are disposed on the back surface of the intermediate strip 23. The intermediate strips 23 and 24 and the vertical members 25 and 26 are positioned at the center position in the width direction of the boards 21 and 22. The strips 23 and 24 are made of cut pieces of interior board material, like the strip 14, and have substantially the same cross-sectional dimensions as the strip 14 (in this example, a plate thickness of 15 mm and a width of 90 mm). The strip 23 has substantially the same overall length (total height) as the lower strip portion 14a, and the strip 24 has substantially the same overall length (full height) as the upper strip portion 14b. Each of the vertical members 25 and 26 is a channel-type lightweight steel member having a width × depth of about 25 mm × 25 mm, and has substantially the same overall length (height) as the strips 23 and 24.

  The lower strip 23 and the steel member 25 are unevenly distributed upward from the lower edge of the lower board 21 by the height of the horizontal strip 12, and the upper ends of the strip 23 and the steel member 25 protrude upward. A portion 27 projects upward from the upper edge of the board 21. The upper band plate 24 and the steel member 26 are shorter than the total length (total height) of the board 22 by the protruding amount of the upper protruding portion 27 of the band plate 23 and the steel member 25, and the flat lower edge portion back surface 27 a is the board 22. Is formed on the board 22 over the entire width.

  The steel members 25 and 26 are fixed to the band plates 23 and 24 by a locking tool such as a tapping screw, or are fixed to the band plates 23 and 24 by using a locking tool and an adhesive. The strips 23 and 24 to which the steel members 25 and 26 are fixed are fixed to the back surfaces of the boards 21 and 22 by using staples or an adhesive, or by using both staples and an adhesive.

  FIG. 7 is a front view showing a board tensioning process for the underlay board material 20.

  As shown in FIG. 7A, the lower board 21 is erected vertically on the floor Fa. The side edge of each board 21 is positioned at the axial center position of each stud 4, and the lower end edge of the strip 23 approaches or abuts the upper edge of the horizontal strip 12. The upper end portions of the band plate 23 and the steel member 25 protrude upward from the upper end edge of the board 21 at an intermediate position of the stud interval, and the upper end level (level) of the band plate 23 and the steel member 25 is the butt joint 16. It substantially matches the level. Each board 21 is fixed to the band plate 14 by using staples or an adhesive, or using both staples and an adhesive.

  The upper board 22 is attached to the upper side of the board 21 as shown in FIG. 7B after the construction of the board 21, and the boards 21 and 22 are aligned vertically. The upper protruding portion 27 of the band plate 23 and the steel member 25 abuts on the lower edge portion back surface 27a (FIG. 6) of the board 21 from which the band plate 24 and the steel member 26 are missing. The band plate 23 and the steel member 25 protrude upward so as to contact the back surface of the upper board 22 and serve as a ruler for positioning the upper board 22 at a predetermined position when the upper board 22 is constructed. When the edges of the boards 21 and 22 are abutted against each other, the upper edge of the lower band plate 23 and the steel member 25 and the lower edge of the upper band plate 24 and the steel member 26 are connected to each other. , 24 and the steel members 25, 26 form a vertical continuous rib in the center of the back surface of the underboard 20. The horizontal joint 28 of the underboard material 20 is located below the butt joint 16, and the vertical joint 29 of the underboard material 20 is located on the vertical strip 14.

  As shown in FIG. 3, the intermediate portion of the board material 20 is separated from the stud 4, and the space 6 is formed as described above, and the heat insulating and sound absorbing material 5 in the inter-stud region is continuous in the space 6. The strips 23 and 24 and the steel members 25 and 26 arranged at the center in the width direction of the board material 20 locally increase the rigidity and mass of the wall surface, and improve the sound insulation performance of the wall surface as a whole. The surface density of the wall surface is changed to prevent vibration transmission (noise transmission) due to the resonance of the wall surface.

  As shown in FIG. 1, interior board materials 31 and 32 constituting the upper board material 30, for example, a gypsum board having a thickness of 9 mm, are attached to the surface of the lower board material 20. The board materials 31 and 32 are fixed to the surface of the underlay board material 20 by staples and / or adhesives. The joints 38 and 39 of the interior board materials 31 and 32 are arranged at positions different from the joints 28 and 29 of the boards 21 and 22. As shown in FIG. 2, the upper and lower ends of the upper board material 30 are positioned in the vicinity of the ceiling surface Ca and the floor surface Fa, and a horizontal joint that can be filled with joint material is formed. The horizontal joint is filled with a gypsum filler 36. Similarly, as shown in FIG. 3, the end portion of the upper board member 30 is positioned in the vicinity of the structure 9 such as another partition wall, outer wall, or columnar portion, and a vertical joint that can be filled with joint material is formed. Is done. The vertical joint is filled with a plaster filler 37.

  If desired, a decorative board that has been pre-finished with a decorative finish is used as the interior board material 31, 32, or a decorative finish such as painting or cloth application is applied to the surface of the interior board material 31, 32. A baseboard member 7 (shown in phantom lines in FIG. 2) is attached in the vicinity of the floor surface of the indoor side wall surface. The baseboard member 7 is attached to the lower end portion of the interior board material 31 with an adhesive or the like.

  The shaft assembly of the partition wall W configured as described above is constructed in a state in which an appropriate interlayer displacement is enabled, like the shaft assembly of the conventional light iron partition wall. The lower end and the upper end of the stud 4 are interconnected by horizontal strips 12 and 13, and a vertical strip 14 having the same thickness as the horizontal strips 12 and 13 is fixed to the outer surface of the stud 4. Since the strips 12, 13, and 14 form a board support plane on which the underboard material 20 can be fixed with staples and / or adhesives, the underboard 20 can be separated from the partition wall W without using a tapping screw such as a board screw. Can be fixed to the shaft assembly.

  Further, since the vertical strip 14 is disposed only on one side of the stud 4, a space 6 corresponding to the thickness of the strip 14 is formed between the opposite side of the stud 4 and the interior board material 20. The Since the section between the studs divided by the stud 4 is continuous by this space 6, a continuous heat insulating and sound absorbing material 5 having a relatively wide area can be filled or inserted into the wall. The workability of the sound absorbing material 5 is improved. At the same time, the space 6 formed between the stud 4 and the interior board material 20 reliably prevents the sound and heat bridging effect. This, together with the effect of structural separation of the upper and lower horizontal strips 12 and 13 supporting the underlaying board material 20 from the runners 2 and 3, will effectively prevent noise bridges and thermal bridges of the partition wall W. . In addition, by eliminating the support in the intermediate region in the width direction of the underlaying board material 20 as described above, it is expected that the strength of the wall surface and the impact resistance performance will be reduced, but the strips 23 and 24 and the steel members 25 and 26 are Vertical continuous ribs are formed on the back surface of the underboard 20 to improve the strength and impact resistance of the underboard 20 and the baseboard 12 of the baseboard portion is relatively susceptible to excessive impact. Since the lower portion of the wall surface is effectively reinforced, it is possible to prevent a decrease in wall strength and impact resistance.

  The vertical continuous rib formed on the back surface of the underboard material 20 also gives an additional mass to the center area of the back surface of the underboard material 20 so that the vibration control effect and resonance prevention due to the mass change and specific gravity change of the board center area. Due to the effect, transmission of noise between rooms can be effectively prevented.

  Furthermore, the strips 12, 13, and 14 cover the metal shaft assembly members in the partition walls W, that is, the outer surfaces of the runners 2, 3 and the studs 4, and suppress an increase in the metal temperature during a fire or the like. The rise in the metal temperature at the time of a fire is closely related to the fireproof performance of the partition wall W, and the prevention of overheating of the metal shaft assembly member improves the fireproof performance of the partition wall W.

  The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the above-described embodiments, and various modifications or changes can be made within the scope of the present invention described in the claims. Is possible.

  For example, various board materials that can be used for buildings or workpieces can be used for the partition wall of the present invention. For example, as the board material, in addition to gypsum board, calcium silicate board, flexible board, gypsum slag board, gypsum fiber board, inorganic fiber reinforced gypsum board, glass fiber reinforced gypsum board, asbestos cement board, fiber reinforced gypsum board (FG board) ) And other board materials can be used.

  Concerning the partition wall structure, it is possible to improve the workability of the face material installation work, improve the workability of heat insulation and sound absorbing materials, eliminate the sound and heat bridge effect, improve the wall strength, and further improve the anti-fire and fire resistance performance. it can.

It is a perspective view of the partition wall which concerns on the Example of this invention. FIG. 2 is a longitudinal sectional view of the partition wall shown in FIG. 1, and FIG. 2 shows a sectional view taken along line II in FIG. 3 (FIG. 2A) and a sectional view taken along line II-II in FIG. (B)) is shown. It is a cross-sectional view of the partition wall in the III-III line of FIG. It is a front view which shows the construction process of the steel wall base. It is a perspective view which shows the erection process of steel wall bases. It is a perspective view which shows the structure of the underlay board material attached to a steel wall base. It is a front view which shows the boarding process of underlay board material.

Explanation of symbols

2 Floor Runner 3 Ceiling Runner 4 Lightweight Steel Stud 5 Heat Insulation / Sound Absorbing Material 6 Space 12, 13 Horizontal Strip 14 Vertical Strip 15 Locking Tool 20 Substrate Board 21 Lower Board 22 Upper Board 23, 24 Intermediate Strip 25 , 26 Vertical member (steel member)
W Partition wall C Ceiling base F Floor base

Claims (3)

Forming the upper and lower metal runners (2, 3), upper and lower ends are inserted respectively into the upper and lower runners (2, 3), the framing by the metallic studs (4) to frictionally engage the runner Then, in the partition wall structure of the dry construction method having a configuration in which the interior board material for building forming the wall surface is attached to both surfaces of the shaft assembly,
The stud center is aligned with the wall core position, and the stud of the first stud row arranged at the vertical joint position (29) of the interior board material (20) on the side of the first chamber, and the stud center is aligned with the wall core position. The studs of the second stud row respectively arranged at the vertical joint positions (29) of the interior board material (20) on the side surface of the second chamber and the side of the first chamber of the stud constituting the first stud row are fixed. The vertical strip (14), the vertical strip (14) fixed only to the side surface of the second chamber of the stud constituting the second stud row, and the runner are disposed along both side surfaces of the runner. A horizontal strip (12, 13) fixed to the upper end or lower end of the stud;
A vertical intermediate strip (23, 24) is fixed to the center of the back surface of the interior board material, and metal members (25, 26) having a smaller cross section than the stud are fixed to the intermediate strip. The intermediate strip and the metal member form a continuous rib perpendicular to the center of the back surface of the interior board,
The vertical strip, the horizontal strip and the intermediate strip are made of cut pieces of interior board material, and the vertical strip, the horizontal strip and the intermediate strip arranged on the same chamber side have the same thickness. And forming a board support surface to which the interior board material (20) can be fixed .   The interior board material (20) is divided into a lower board and an upper board, and the intermediate strips (23, 24) and metal members (25, 26) are fixed to the back center of each board, The partition wall structure according to claim 1, wherein the intermediate strip and the metal member form the continuous rib when the lower and upper boards are connected vertically. The stud interval of the first stud row and the stud interval of the second stud row are set to the same dimension S, and each stud row is shifted in the direction of the wall core by S / 4. The partition wall structure according to claim 1, wherein the partition wall structure is arranged at equal intervals (S / 4) in the core direction.

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