JP2025080345A - Studs - Google Patents

Abstract

To provide a stud that has good adiabaticity and workability.SOLUTION: A stud comprises a cardboard layer 11 and is placed between main columns.SELECTED DRAWING: Figure 1

Description

The present invention relates to studs used in buildings and other structures.

Currently, there is an increasing demand for easy construction due to the aging and declining number of construction workers. In addition, there is also an increasing demand for reduced carbon dioxide emissions from the perspective of environmental impact. In response to these two demands, the former calls for lightweight building materials and ease of processing that does not require tools, while the latter calls for reduced carbon dioxide emissions during manufacturing and demolition, and insulation. The use of cardboard has been attracting attention in recent years as a building material that meets these demands.

In buildings, studs that function as base members for wall materials such as interior and exterior walls are sometimes installed between the main pillars. Studs are typically made of metals such as steel and aluminum (see, for example, Patent Document 1).

JP 2017-227099 A

If the studs are made of metal, which has high thermal conductivity, they can act as thermal bridges, which can have a negative effect on insulation. There is also the problem that metal studs are difficult to install due to their weight.

Therefore, the objective of the present invention is to provide studs that have good insulation properties and ease of construction.

As a result of extensive research, the inventors have found that the above problems can be solved by providing a corrugated cardboard layer, and have completed the present invention. That is, the present invention provides the following [1] to [3].
[1] A partition wall that is installed between main columns and has a corrugated cardboard layer.
[2] The partition wall of the partition wall described in [1], comprising a plurality of the cardboard layers, each of the cardboard layers having at least two or more types of flutes laminated thereon.
[3] The partition wall of the partition wall described in [1] or [2], comprising a plurality of the cardboard layers, the cardboard layers being bonded together with a fire-resistant adhesive.

The present invention provides studs that have good insulation properties and ease of installation.

1(a) and (b) show schematic side views of a stud according to a first embodiment of the present invention, and FIG. 1(c) shows a schematic top view of the stud according to the first embodiment of the present invention. FIG. 1 is a schematic cross-sectional view (part 1) showing a specific example of a cardboard layer used for a stud. FIG. 2 is a schematic cross-sectional view (part 2) showing a specific example of a cardboard layer used for a stud. FIG. 1 is a front view showing a wall structure having studs to which a stud according to a first embodiment of the present invention is applied. FIG. 5(a) shows a schematic side view of a stud according to a modified example of the first embodiment of the present invention, and FIG. 5(b) shows a schematic top view of a stud according to a modified example of the first embodiment of the present invention. 6(a) and (b) show schematic side views of a stud according to a second embodiment of the present invention, and FIG. 6(c) shows a schematic top view of a stud according to the second embodiment of the present invention. 7(a) and (b) show schematic side views of a stud according to a third embodiment of the present invention, and FIG. 7(c) shows a schematic top view of a stud according to the third embodiment of the present invention. FIG. 11 is a front view showing a wall structure having studs to which studs according to another embodiment of the present invention are applied.

The present invention will be described in more detail below with reference to the embodiments.

[First embodiment]
The stud 1A according to the first embodiment of the present invention includes a corrugated cardboard layer.
The stud 1A is a hollow cylindrical pillar member (hereinafter, simply referred to as a cylindrical member) 10 made of at least one corrugated cardboard layer. In the example of FIG. 1, the cylindrical member 10A has a rectangular cross section and four side surfaces (XZ plane, YZ plane). The stud 1A made of the cylindrical member 10A has openings at both ends in the Z-axis direction. The openings may be appropriately closed by a surface material made of a corrugated cardboard layer or the like.
In the stud 1A, each corrugated cardboard layer 11 is arranged along the XZ plane or the YZ plane on each side constituting the cylindrical member 10A. Therefore, the outer peripheral surfaces in the XZ plane and the YZ plane are formed by the plane of the liner of the corrugated cardboard layer 11 (see Figs. 2 and 3). As shown in Fig. 1(c), the cross section of the corrugated cardboard layer 11 is exposed at both ends in the Z-axis direction of the stud 1A. In this specification, the Z direction is the vertical direction when the stud 1A is installed in a building, and the X and Y directions are two axes that are horizontal and perpendicular to each other. Therefore, the Z direction is the longitudinal direction of the stud 1A, and the X and Y directions are perpendicular to each other and also perpendicular to the Z direction.

The stud 1A is lightweight and easy to process because of the cardboard layer 11, ensuring excellent workability. In addition, the cardboard layer 11 of the stud 1A reduces the thermal conductivity of the stud 1A, so it does not act as a thermal bridge and can suppress a decrease in insulation. Furthermore, the cardboard layer 11 of the stud 1A creates an air layer with the core 14 (described below), improving insulation. In addition, the cardboard layer 11 of the stud 1A makes it easier to recycle, which also contributes to reducing carbon dioxide emissions.

Specific examples of the cardboard layers on each side of the tubular member 10A are shown in Figures 2 and 3. The stud 1A has at least one cardboard layer 11, which has a core 14 and liners 15, 15 provided on both sides of the core 14. The core 14 is made up of wave-shaped flutes, and each apex of the wave-shaped flutes is glued to the liners 15, 15 on both sides. The liner 15 and the core 14 are preferably glued together with an adhesive (not shown). The core 14 and the liner 15 are preferably made of paper material used in general cardboard.

The corrugated board layer 11 may be a so-called single flute, which has one layer of flutes as the core 14, as shown in FIG. 2(a). In this specification, the number of cores 14 provided in the thickness direction of the corrugated board layer 11 is the number of layers of the corrugated board layer 11. When the corrugated board layer 11 is a single layer of corrugated board, it is preferable that the corrugated board layer 11 is a so-called double-sided corrugated board, which has a core 14 and liners 15, 15 provided on both sides of the core, as shown in FIG. 2(a).

On each side of the tubular member 10A, the corrugated cardboard layer 11 may be a two-layer layer called a double flute layer, in which two layers of flutes are laminated as the core 14, as shown in Fig. 2(b). When the corrugated cardboard layer 11 is formed by laminating a plurality of cores 14, it may be a three-layer layer as shown in Fig. 2(c), or may be a four-layer layer or more, not shown.
When the number of layers of the corrugated board layer 11 is two or more, the mechanical strength is increased, and the corrugated board layer 11 can be suitably used as a base material for the wall material 40. From the viewpoint of increasing the mechanical strength, the number of layers of the corrugated board layer 11 is more preferably three or more.
The number of layers of the cardboard layers 11 on each side of the tubular member 10A is not particularly limited, but from the viewpoint of easy handling as a partition wall 1A, it is sufficient to have, for example, 10 layers or less, preferably 7 layers or less, and more preferably 5 layers or less.

The number of steps in each core 14 that forms the wave-shaped flutes is not particularly limited, but it is sufficient that there are about 20 to 110 steps per 30 cm, preferably 30 to 100 steps, and more preferably 32 to 55 steps. Furthermore, the step height in each core 14 is sufficient that there are about 1 to 6 mm, but is preferably 1.5 to 5.5 mm, and more preferably 2.5 to 5.5 mm. Cores 14 with the above number of steps and step height can be manufactured for general purposes, and also make it easier to improve the mechanical strength of the partition wall 10.

Each core 14 may be, but is not limited to, an A flute, B flute, C flute, or E flute as defined in JIS Z 1516:2003. An A flute has 34±2 flutes per 30 cm, and the flute height is generally about 5 mm. A B flute has 50±2 flutes per 30 cm, and the flute height is generally about 3 mm. A C flute has 40±2 flutes per 30 cm, and the flute height is generally about 4 mm. An E flute has 93±5 flutes per 30 cm, and the flute height is generally about 1.8 mm.

When there are two or more layers of cardboard layers 11 on each side of the tubular member 10A, it is preferable that at least two or more types of flute cores 14 are laminated as shown in Figures 2(b), (c) and 3(a), (b). Here, it is preferable that the flutes are of different types with different numbers of steps, but typically the height of the steps is also different according to the number of steps. In the present invention, by using different types of flutes as the cardboard layers 11, it becomes easier to obtain a stud 1A with high mechanical strength.

When the corrugated board layer 11 is formed by laminating cores 14 having two or more types of flutes, it is more preferable that the corrugated board layer 11 has two or more layers having different types of flutes as defined in JIS Z 1516:2003, and when two layers of cores 14 are laminated, it is preferable that the type of flute is, for example, any one of AB flute, AC flute, AE flute, BC flute, BE flute, or CE flute.
Furthermore, when the corrugated board layer 11 has three or more layers, the core 14 may have three or more types of flutes, such as ABC flutes and AABE flutes, or the core 14 may have two types of flutes, such as ACA flutes, AAB flutes, and AAC flutes. In other words, when the corrugated board layer 11 is made up of two or more types of flutes laminated together and has three or more layers, some of the layers may have the same type of flutes.
Note that Figures 2(b) and (c) and Figures 3(a) and (b) are examples in which two different types of flutes are stacked, and Figures 2(c) and 3(b) are examples in which flutes of the same type are also provided.

When the corrugated board layer 11 has two layers, it may have three liners 15 and a core 14 disposed between each of the liners 15, 15, as shown in FIG. 2(b). Similarly, when the corrugated board layer 11 has three layers, it may have four liners 15 and a core 14 disposed between each of the liners 15, 15, as shown in FIG. 2(c). That is, in the structure shown in FIG. 2(b) and (c), adjacent cores 14 may be bonded to the same liner 15 between them. A similar structure may be used when the corrugated board layer 11 has four or more layers.

When there are two or more cardboard layers 11, as shown in Figures 3(a) and (b), adjacent cardboard layers 11, 11 may have two liners 15, 15 between them, in which case adjacent cores 14, 14 may be adhered to separate liners 15.
3(a) and 3(b), a corrugated board layer 11 consisting of a core 14 and a pair of liners 15, 15 on both sides of the core 14 may be bonded to a liner 15 constituting another corrugated board layer 11 via an adhesive 16. With this configuration, a corrugated board layer 11 having two or more layers can be obtained by bonding general-purpose corrugated board with the adhesive 16. This makes it easier to manufacture a stud 1A with high mechanical strength using a simple manufacturing method.
In addition, in the configuration shown in Fig. 3, there are two liners 15 between adjacent cores 14, 14, but either of the liners between adjacent cores 14, 14 may have two liners as shown in Fig. 3(a) and (b), or either of the liners may have one liners as shown in Fig. 2(b) and (c). Furthermore, the number of liners 15 between adjacent cores 14, 14 is not limited to one or two, and may be three or more.

When the corrugated board layer 11 is two or more layers, it is preferable to use a fireproof adhesive as an adhesive for bonding adjacent corrugated board layers 11, 11. Here, the adhesive for bonding adjacent corrugated board layers 11, 11 is the adhesive 16 for bonding liners 15, 15 in the configuration shown in Figures 3(a) and (b). On the other hand, in the configuration shown in Figures 2(b) and (c), the adhesive for bonding adjacent corrugated board layers 11, 11 is an adhesive (not shown) for bonding at least one of adjacent cores 14, 14 and the liner 15 disposed between the adjacent cores 14, 14.
A highly fire-resistant partition 1A can be manufactured by using a fire-resistant adhesive as the adhesive for bonding between adjacent corrugated board layers 11, 11. In addition, for example, by bonding together multiple sheets of at least one of commonly used single-flute corrugated board (double-sided corrugated board or single-sided corrugated board) or double-flute corrugated board in the thickness direction using a fire-resistant adhesive, a partition 1A with high fire resistance and mechanical strength can be easily manufactured.
Furthermore, when the number of cardboard layers 11 is three or more, it is preferable that all of the cardboard layers 11 are bonded together with a fire-resistant adhesive, but some of the cardboard layers 11 may be bonded together with a fire-resistant adhesive, and some of the cardboard layers 11 may be bonded together with an adhesive other than the fire-resistant adhesive.

The fire-resistant adhesive is not particularly limited as long as it can be bonded to paper materials and has fire resistance, but inorganic adhesives are preferred. Examples of inorganic adhesives include water glass-based adhesives that use water glass as an adhesive component. Water glass-based adhesives may be made of water glass composed of water and silicates such as sodium silicate, but may also contain inorganic fillers and other additives in addition to water glass as appropriate. By using a water glass-based adhesive as the fire-resistant adhesive, it is possible to improve fire resistance while facilitating adhesion between liners, which are paper materials, or between a liner and a core.

The thickness of the cardboard layer 11 is not particularly limited, but may be, for example, about 2 to 30 mm, preferably 4 to 25 mm, and more preferably 6 to 25 mm. By making the thickness of the cardboard layer 11 equal to or greater than the above lower limit, it is possible to impart appropriate mechanical strength to the partition 1A. Furthermore, by making the thickness equal to or less than the above upper limit, it is possible to provide the partition 1A with good handleability.

<Method of manufacturing studs>
The method of manufacturing the stud 1A is not particularly limited, but a corrugated board layer is formed by a known manufacturing method. When the corrugated board layer has two or more layers, an adhesive, preferably a fire-resistant adhesive, is applied to at least one of the surfaces of the single flute or double flute (e.g., the surface of the liner or the surface of the core), and the corrugated board layers are bonded together via the adhesive to form a multi-layer corrugated board layer. Depending on the type of adhesive, the corrugated board layers may be subjected to a post-treatment to solidify or harden the adhesive. For example, when the adhesive is a water glass-based adhesive, the corrugated board layers may be bonded together with the adhesive and then heated to harden the water glass.
The formed corrugated cardboard layer is then folded at right angles in three places to form the four outer periphery faces, and the corrugated cardboard layers are fixed at the free corners to manufacture the cylindrical stud 1A. Alternatively, the four formed corrugated cardboard layers are combined and arranged to form the four outer periphery faces, and the corrugated cardboard layers are fixed at the corners formed by the ends of adjacent corrugated cardboard layers to manufacture the cylindrical stud 1A. The method for fixing the corrugated cardboard layers is not particularly limited, but an adhesive can be used, and preferably a fire-resistant adhesive can be used.

<Wall structure with studs>
As shown in Fig. 4, the partition 1A is provided between the main columns 20. The partition 1A and the main columns 20 are arranged from the floor beams 30 to the ceiling beams 31. The main columns 20 are components that bear the load of the building, but the partition 1A do not bear the load of the building and function as a base member for the wall materials 40 such as the interior and exterior walls. There is no particular limit to the number of partition 1A provided between the main columns 20, and there may be one, or two or more.
The main pillars 20, floor beams 30 and ceiling beams 31 may be made of wood or metal such as steel.
Examples of the wall material 40 include gypsum board, lightweight aerated concrete (ALC), medium density fiberboard (MDF), wood cement board, wood wool cement board, structural plywood, decorative plywood, and corrugated cardboard.

The wall material 40 may be fixed to the stud 1A by a fixing member 35 such as a known nail, screw, screw, or staple. Specifically, as shown in FIG. 4, the wall material 40 may be fixed to the stud 1A by the fixing member 35, or may be fixed by adhesive, double-sided adhesive tape, or the like. The fixing member 35 may penetrate the wall material 40 from the front to the back and reach the stud 1A to fix the wall material 40 to the outer circumferential surface (XZ plane, YZ plane) of the stud 1A. The wall material 40 may also be fixed by adhesive, double-sided adhesive tape, or the like arranged between the back surface of the wall material 40 and the outer circumferential surface (XZ plane, YZ plane) of the stud 1A. The double-sided adhesive tape may be an adhesive tape having a tape base and an adhesive layer on both sides of the tape base, or may be a so-called substrate-less double-sided adhesive tape that does not have a substrate. Furthermore, the wall material 40 may be fixed to the stud 1A by combining two or more types of nails, screws, screws, staples, adhesives, and adhesive tapes.

The stud 1A according to the first embodiment is configured with a corrugated cardboard layer, so it does not act as a thermal bridge and can maintain good thermal insulation. In addition, the stud 1A according to the first embodiment is configured with a corrugated cardboard layer, so it can be made lighter, making installation easier and improving workability.

[Modification of the first embodiment]
The stud 1D according to the modified example of the first embodiment may be configured such that a plurality of tubular members 10A are connected and integrated as shown in Figs. 5(a) and (b). The plurality of tubular members 10A may be connected to form an integrated unit, for example, two tubular members 10A may be connected, or three or more tubular members 10A may be connected. By connecting and integrating a plurality of tubular members 10A, the mechanical strength is increased, and the wall material 40 may be preferably used as a base member.

A method for connecting and integrating multiple tubular members 10A is to apply an adhesive, preferably a fire-resistant adhesive, to at least one of the surfaces of the cardboard layers 11 that make up the sides of each tubular member 10A, and then, as shown in Figures 5(a) and (b), to bond the cardboard layers 11 that make up the sides of each tubular member 10A together via the adhesive 17, thereby integrating them.

Second Embodiment
Next, a second embodiment of the present invention will be described in detail. The second embodiment differs from the first embodiment in the arrangement pattern of the corrugated cardboard layers 11 in the studs 1B, as shown in FIG. 6. The differences between the first embodiment and the second embodiment will be described below. Also, parts that will not be described are the same as those in the first embodiment. Also, in the following description, the same reference numerals will be used to designate members having the same configuration as the first embodiment.

The stud 1B is composed of a pillar member 10B in which a plurality of (6 in Figs. 6(a) and 6(c)) corrugated cardboard layers 11, which are substantially the same rectangular shape in the YZ plane, are stacked in the X-axis direction. As shown in Fig. 6(a) , the cross sections of the stacked corrugated cardboard layers 11 are exposed on the outer circumferential surface (XZ plane) of the stud 1B. As shown in Fig. 6(b) , the outer circumferential surface (YZ plane) of the stud 1B is formed by a plane formed by the liner of the corrugated cardboard layers 11. As shown in Fig. 6(c) , the cross sections of the stacked corrugated cardboard layers 11 are exposed on both ends in the Z-axis direction of the stud 1B. The number of stacked corrugated cardboard layers 11 is not particularly limited, but is, for example, about 5 to 500 layers, preferably 8 to 200 layers, and more preferably 10 to 100 layers.
In addition, in the multiple cardboard layers 11, one liner may be provided between each cardboard layer 11 as shown in Figure 2, or multiple liners (usually two) may be provided between each cardboard layer 11 as shown in Figure 3.

The method for manufacturing the stud 1B is not particularly limited, but a corrugated cardboard layer is formed by a known manufacturing method. Then, the formed multiple corrugated cardboard layers are stacked in order to manufacture the columnar stud 1B. In this case, each layer of corrugated cardboard may be a single layer of corrugated cardboard, or may be a layer of two or more layers of corrugated cardboard (usually two to three layers of corrugated cardboard) that have been stacked in advance.
It is preferable to use a fire-resistant adhesive as the adhesive for bonding between the layers of corrugated cardboard. By using a fire-resistant adhesive as the adhesive for bonding between the layers of corrugated cardboard, it is possible to manufacture a highly fire-resistant partition wall 1B.

According to the stud 1B of the second embodiment, since it is configured with a corrugated cardboard layer, it does not act as a thermal bridge and can maintain good thermal insulation. Also, according to the stud 1B of the second embodiment, since it is configured with a corrugated cardboard layer, it can be made lighter, and installation work and the like can be made easier, resulting in good workability. Also, according to the stud 1B of the second embodiment, since it is configured with a plurality of corrugated cardboard layers stacked together, the mechanical strength is increased, and it can be suitably used as a base material for wall materials.
When using fixing members 35 such as nails, screws, bolts, and staples, the studs 1B are preferably arranged so that the YZ plane faces the wall material 40. With this configuration, the fixing members 35 are inserted into the studs 1B along the X direction so as to pass through the multiple corrugated cardboard layers 11. Therefore, the wall material 40 can be firmly fixed to the studs 1B by the fixing members 35.
Of course, the XZ plane may be disposed so as to face the wall material 40, but in that case, the outer peripheral surface facing the wall material 40 is the cross section of the laminated multiple corrugated cardboard layers 11. Therefore, it may be difficult to firmly fix it with fixing members 35 such as nails, screws, bolts, and staples, but it can be suitably used as a base member for the wall material by using an adhesive, double-sided adhesive tape, or the like.

[Third embodiment]
Next, a third embodiment of the present invention will be described in detail. The third embodiment differs from the first embodiment in the arrangement pattern of the corrugated cardboard layers 11 in the studs 1C, as shown in FIG. 7. The third embodiment will be described below in terms of the differences from the first embodiment. Also, parts that will not be described are the same as those in the first embodiment. Also, in the following description, the same reference numerals will be used to designate members having the same configuration as those in the first embodiment.

The stud 1C is composed of a pillar member 10C in which a plurality of (18 in Figs. 7(a) and 7(b)) corrugated cardboard layers 11, each having substantially the same square or rectangular shape in the XY plane, are stacked in the Z-axis direction. As shown in Fig. 7(a) , the cross sections of the plurality of stacked corrugated cardboard layers 11 are exposed on the outer peripheral surface (XZ plane) of the stud 1C. As shown in Fig. 7(b) , the cross sections of the plurality of stacked corrugated cardboard layers 11 are exposed on the outer peripheral surface (YZ plane) of the stud 1C. As shown in Fig. 7(c) , both ends of the stud 1C in the Z-axis direction are formed by planes formed by the liners of the corrugated cardboard layers 11. The number of stacked corrugated cardboard layers 11 is not particularly limited, but is, for example, about 30 to 5,000 layers, preferably 50 to 2,000 layers, and more preferably 100 to 1,000 layers.
In addition, in the multiple cardboard layers 11, one liner may be provided between each cardboard layer 11 as shown in Figure 2, or multiple liners (usually two) may be provided between each cardboard layer 11 as shown in Figure 3.

Although the method for manufacturing the stud 1C is not particularly limited, a corrugated cardboard layer is formed by a known manufacturing method. Then, by stacking the formed multiple corrugated cardboard layers in order, the columnar stud 1C can be manufactured. In this case, each layer of corrugated cardboard may consist of a single layer of corrugated cardboard, or may consist of two or more layers of corrugated cardboard (usually two to three layers of corrugated cardboard) that have been previously stacked. It is preferable to use a fire-resistant adhesive as the adhesive for bonding between each layer of corrugated cardboard. By using a fire-resistant adhesive as the adhesive for bonding between each layer of corrugated cardboard, a highly fire-resistant stud 1C can be manufactured.

According to the stud 1C of the third embodiment, the configuration including the corrugated cardboard layer does not act as a thermal bridge and can maintain good thermal insulation. Also, according to the stud 1C of the third embodiment, the configuration including the corrugated cardboard layer can reduce the weight, making installation work easier and improving workability. Also, according to the stud 1C of the third embodiment, the mechanical strength is increased by stacking multiple corrugated cardboard layers, and it can be suitably used as a base material for wall materials.
Incidentally, because the partition 1C has a cross section of multiple laminated cardboard layers 11 on its outer circumferential surface (XZ plane, YZ plane), it may be difficult to firmly fix it with fixing members 35 such as nails, screws, bolts, and stabilizers; however, by using adhesive, double-sided adhesive tape, or the like, it can be suitably used as a base member for wall materials.

[Other embodiments]
The present invention is not limited to the configurations of the first to third embodiments described above, and any improvements and modifications may be made without departing from the technical spirit of the present invention.
For example, in the modified example of the first embodiment, a plurality of column members 10A are connected and integrated, but a plurality of column members 10B in the second embodiment or a plurality of column members 10C in the third embodiment may also be connected and integrated.
In addition, the present invention is not limited to a configuration in which a plurality of column members of the same type are connected, and a plurality of column members 10A, 10B, and 10C of different types may be connected and integrated. Specifically, the column members 10A, 10B, and 10C shown in the first to third embodiments may be selected, combined, connected, and integrated.

Furthermore, in the stud 1B in the second embodiment, the outer peripheral surface formed in the XZ plane may be bonded to a sheet material such as paper material or resin film. The outer peripheral surface formed in the XZ plane was a cross section of the laminated multiple corrugated cardboard layers 11, but by bonding the sheet material, the cross section of the laminated multiple corrugated cardboard layers 11 is covered with the sheet material. Therefore, even if the outer peripheral surface formed in the XZ plane faces the wall material 40 and a fixing member 35 such as a nail, screw, bolt, or staple is used, the fixing member 35 passes through the sheet material, making it easier to fix firmly.
Similarly, the stud 1C in the third embodiment may have a sheet material attached to its outer peripheral surface consisting of the XZ plane or the YZ plane. Even in this case, the outer peripheral surface consisting of the XZ plane or the YZ plane to which the sheet material is attached faces the wall material 40, and even if fixing members 35 such as nails, screws, bolts, and staples are used, the fixing members 35 pass through the sheet material, making it easy to achieve strong fixation.
Of course, in each embodiment, a sheet material may be attached to the outer peripheral surface, not the cross-section, of the stacked multiple corrugated board layers 11 .

Furthermore, the wall structure having studs is not limited to the configuration shown in Fig. 4, and may have not only studs 1A but also furring strips 32 as base members for wall material 40 as shown in Fig. 8. The furring strips 32 are disposed between the main posts 20, 20 and fixed to the main posts 20, 20 and the studs 1A. When the wall structure having studs has furring strips 32, the wall material 40 may be fixed to the furring strips 32 by known fixing members 35. The furring strips 32 may be made of wood or may be made of metal such as steel. Even in the case of a configuration having furring strips 32, the fixing members 35 may be fixed to the studs.
By configuring the wall structure having studs and including furring strips 32, the furring strips 32 can impart lateral mechanical strength to the wall material 40 as a base material.

1A, 1B, 1C Stud 10A, 10B, 10C Pillar member 11 Corrugated cardboard layer 14 Core 15 Liner 16, 17 Adhesive 20 Main pillar 30 Floor beam 31 Ceiling beam 32 Furring strip 35 Fixing member 40 Wall material

Claims (3)

A stud installed between main posts, with a corrugated cardboard layer. A plurality of said corrugated cardboard layers are provided,
The stud according to claim 1 , wherein the plurality of corrugated cardboard layers are laminated with at least two types of flutes. The stud according to claim 1 or 2, comprising a plurality of said corrugated cardboard layers, said corrugated cardboard layers being bonded together with a fire-resistant adhesive.