Exterior wall panels

Abstract

We provide exterior wall panel technology that can reduce manufacturing costs. [Solution] The exterior wall panel 10 comprises a rectangular frame member 12 having a pair of elongated Z-shaped steel members 12Y each formed from a single plated steel sheet and having a web WB and a pair of flanges FL, arranged parallel to each other with a gap between them; a pair of elongated channel steel members 12X each formed from a single plated steel sheet and having a web WB and a pair of flanges FL; and a joining member 14 that mechanically joins the overlapping flanges FL at the respective longitudinal ends of the chord members 12Y and column members 12X; an adhesive layer placed on the plate surface of the flange FL on the side opposite to where the respective joining members 14 of the pair of chord members 12Y are located and on the plate surface of the flange FL on the side opposite to where the respective joining members 14 of the pair of column members 12X are located; and a face material 16 that is joined to the frame member 12 by being placed on the adhesive layer.

Description

Technical Field

[0001] The present disclosure relates to an outer wall panel.

Background Art

[0002] Conventionally, as in Patent Document 1, an outer wall panel including a steel frame member and interior and exterior facing materials joined to the plate surface portion of the frame member is known as a building member such as a wall material. In some cases, a functional material such as a heat insulating material is further integrated with the plate surface portion of the steel frame member of the outer wall panel. The manufactured outer wall panel is carried into a building construction site and attached to the building frame at the construction site.

[0003] The frame member can be assembled, for example, by joining the longitudinal end portions of a plurality of channel steels as column members extending in the vertical direction and a plurality of channel steels as chord members extending in the horizontal direction. In the frame member of Patent Document 1, the joint between the column member and the chord member is formed by welding. Further, the frame member assembled by joining a pair of chord members and a pair of column members is joined to the facing material with an adhesive.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When a pair of chord members and a pair of column members are made of steel plates without a plating layer on the surface for rust prevention, although the plating layer is not removed by welding, a separate rust prevention treatment process is required for the assembled rectangular frame members. For this reason, when steel frame members are assembled by welding as in Patent Document 1, there is room for improvement in the technology to reduce the manufacturing burden of the exterior wall panels including the frame members.

[0006] Furthermore, when rectangular frame members are assembled by welding using a pair of chord members and a pair of column members, each formed from a pre-plated steel sheet with a plating layer already placed on the surface of the base material (so-called pre-plated steel sheet), the plating layer on the chord members and column members is removed from the surface of the base material by welding. Therefore, after welding, a separate repair operation is required in the manufacturing process of the exterior wall panel to reposition the plating on the parts of the frame member where the plating layer has been removed.

[0007] In addition, in Patent Document 1, in order to join the facing material and the frame member, it is necessary to apply adhesive to all four sides of the rectangularly assembled frame member. Since the length of each of the four sides is relatively long, the frame member is bulky as an object to be coated. For this reason, it is necessary to prepare a large placement space and workspace for the assembled frame member for the adhesive application and inversion work. As a result, when joining a rectangular frame member and facing material as in Patent Document 1, there is room for improvement in the technology to reduce the manufacturing burden of the exterior wall panel from the perspective of the burden of adhesive application work.

[0008] This disclosure is made in view of the above and provides a technology for exterior wall panels that can reduce manufacturing costs. [Means for solving the problem]

[0009] The exterior wall panel according to this disclosure comprises a rectangular frame member having a pair of elongated Z-shaped steel members, each formed from a single plated steel sheet and having a web and a pair of flanges, arranged parallel to each other with a gap between them; a pair of elongated channel steel members, each formed from a single plated steel sheet and having a web and a pair of flanges; a joining member that mechanically joins the overlapping flanges of the respective longitudinal ends of the chord members and the column members; an adhesive layer disposed on the plate surface of the flange of each of the pair of chord members on the side opposite to where the joining member is located and on the plate surface of the flange of each of the pair of column members on the side opposite to where the joining member is located; and a face material that is joined to the frame member by being disposed on the adhesive layer. [Effects of the Invention]

[0010] According to the exterior wall panels described in this disclosure, manufacturing costs can be reduced. [Brief explanation of the drawing]

[0011] [Figure 1] This is a front view illustrating an exterior wall panel according to an embodiment of the present disclosure. [Figure 2] This is a side view illustrating the exterior wall panel according to this embodiment. [Figure 3] This is a plan view illustrating the exterior wall panel according to this embodiment. [Figure 4] This is a magnified view of part 4 of Figure 1. [Figure 5] This is a magnified view of part 5 of Figure 1. [Figure 6] This is a cross-sectional view taken along line 6-6 in Figure 1. [Figure 7] This is a cross-sectional view taken along line 7-7 in Figure 1. [Figure 8] This is a cross-sectional view taken along line 8-8 in Figure 1. [Figure 9] Figure 9(A) is a side view illustrating the manufacturing method of the exterior wall panel according to this embodiment. Figure 9(B) is a side view illustrating the manufacturing method of the exterior wall panel according to this embodiment, following Figure 9(A). [Figure 10]It is a front view for explaining an outer wall panel according to a modification of the present embodiment. [Figure 11] It is an enlarged view of part 11 in FIG. 10.

Mode for Carrying Out the Invention

[0012] The present embodiment will be described below. In the description of the following drawings, the same parts and similar parts are denoted by the same reference numerals or similar reference numerals. However, the relationship between the thickness and the planar dimensions in the drawings, the ratio of the thicknesses of each device and each member, etc. are different from the actual ones. Therefore, the specific thicknesses and dimensions should be determined in consideration of the following description. Also, there are parts where the dimensional relationships and ratios are different between the drawings. Further, unless otherwise specified in the specification, the number of each component of the present disclosure is not limited to one, and a plurality of them may exist.

[0013] <Outer wall panel> First, the outer wall panel 10 according to the present embodiment will be described with reference to FIGS. 1 to 8. As shown in FIGS. 1 to 3, the outer wall panel 10 includes a frame member 12, a joint member 14, a face material 16, and an adhesive layer. In this specification, the illustration of the adhesive layer is omitted.

[0014] (Frame member) As shown in FIG. 1, the frame member 12 has a pair of chord members 12Y and a pair of column members 12X.

[0015] (Chord member) The pair of chord members 12Y are each formed from a single plated steel sheet. The plated steel sheet is a steel sheet with plating applied in advance on the surface of the base steel sheet, that is, a pre-plated steel sheet. The pair of chord members 12Y are long Z-shaped steels having a web WB and a pair of flanges FL. The Z-shaped steel has a Z-shaped cross section in a cross-sectional view. As shown in FIG. 7, a lip extending along the horizontal direction is formed at the upper end of the upper flange FL of the Z-shaped steel of the chord member 12Y of the present embodiment.

[0016] The string member 12Y of this embodiment has a length of, for example, about 1 m along the left-right direction (i.e., the horizontal direction) in FIG. 3. In the present disclosure, the length of the string member is arbitrary. A pair of string members 12Y are arranged in parallel with a gap therebetween in the up-down direction in FIG. 1, symmetrically in the up-down direction. Also, the flanges on the side where the facing material does not attach are arranged to face each other.

[0017] (Column member) A pair of column members 12X are each formed from a single plated steel sheet. The plated steel sheet is a steel sheet pre-plated on the surface of the steel sheet as the base material, that is, a pre-plated steel sheet. A pair of column members 12X are long channel steels having a web WB and a pair of flanges FL.

[0018] The column member 12X of this embodiment has a length of, for example, about 3 m along the up-down direction (i.e., the vertical direction) in FIG. 2. In the present disclosure, the length of the column member is arbitrary. A pair of column members 12X are arranged in parallel with a gap therebetween in the left-right direction in FIG. 1.

[0019] Specifically, one of the pair of column members 12X (for example, the left column member 12X in FIG. 1) is arranged to intersect each of the pair of string members 12Y at one end side in the extending direction of the string member 12Y (the left end side in FIG. 1). Also, the other of the pair of column members 12X (for example, the right column member 12X in FIG. 1) is arranged to intersect each of the pair of string members 12Y at the other end side in the extending direction of the string member 12Y (the right end side in FIG. 1). As shown in FIG. 4, the flanges FL overlapping at the longitudinal ends of the pair of string members 12Y and the pair of column members 12X are mechanically joined only by the joining member 14 without being welded.

[0020] In this embodiment, an example is shown in which a column member 12X separate from the pair of column members 12X is positioned in the center in the left-right direction in Figure 1. In this disclosure, the presence or absence of a column member 12X separate from the pair of column members 12X is optional. Also, in this disclosure, the number of column members 12X separate from the pair of column members 12X is optional. As shown in Figure 5, the other column member 12X is not welded, similar to the joining of the pair of column members 12X and the pair of chord members 12Y, but rather the overlapping flanges FL at their respective longitudinal ends are mechanically joined only by the joining member 14.

[0021] (outward bent channel steel) As shown in Figure 6, in this embodiment, the channel steel of the column member 12X is an outward-folded channel steel. The flange FL of the outward-folded channel steel of the column member 12X has a base BP, a folded portion FP, and an outer layer OP. The base BP is a strip that is continuous with the web WB of the channel steel. The folded portion FP is located at the end of the base BP opposite to the web WB. The outer layer OP is located on the outer surface side of the base BP in the flange FL width direction and is a strip that extends parallel to the base BP from the folded portion FP toward the web WB.

[0022] The outer-folded channel steel of column member 12X is a channel steel in which the flange FL is folded back by approximately 180 degrees on the opposite side of the web WB (right side in Figure 6). Specifically, the outer-folded channel steel can be formed by bending a single steel plate using a roll forming device or a bending device. The specifications of the outer-folded channel steel are similar to those of the channel steel having an outer layer disclosed in, for example, Japanese Patent Application Publication No. 2023-110433.

[0023] In this disclosure, it is not essential that the channel steel used for the column members be externally folded channel steel. The column members in this disclosure may be general channel steel without an outer layer.

[0024] (Intersection of chord members and column members) In this embodiment, as shown in Figure 1, an example of the intersection state between the chord member 12Y and the column member 12X is given where the intersection angle between the chord member 12Y and the column member 12X is 90 degrees and perpendicular. However, in this disclosure, "perpendicular" is not limited to cases where the intersection angle is strictly 90 degrees. If the intersection angle between the flat web WB surface of the chord member 12Y and the flat web WB surface of the column member 12X is 85 degrees or more and 95 degrees or less, it can be considered "perpendicular".

[0025] (Jointing member) As shown in Figures 4 and 5, the joining member 14 mechanically joins the overlapping flanges of the chord member 12Y and the column member 12X at their respective longitudinal ends. In other words, the joining member 14 mechanically joins the chord member 12Y and the column member 12X in the area where the face material 16 is not joined.

[0026] The joining member 14 in this embodiment is, for example, a screw. In this embodiment, the number of screws as joining members 14 is exemplified as two for one of the four corners of the rectangle. In this disclosure, the number of joining members is not limited to this. In this disclosure, the number of joining members for one corner may be one, three or more, etc., and can be changed as appropriate.

[0027] Furthermore, while this embodiment exemplifies the use of screws as the joining member 14 for a mechanical joint structure, this disclosure is not limited to this. In this disclosure, other joining members besides screws, such as bolts and nuts, may be used for the mechanical joint structure. Also, in this disclosure, the mechanical joint structure may be formed by "crimping".

[0028] Furthermore, as shown in Figures 6 to 8, the joining member 14 mechanically joins the chord member 12Y and the column member 12X to the face material 16. However, in this disclosure, the joining member 14 that mechanically joins the chord member 12Y and the column member 12X to the face material 16 is not essential. Also, Figures 6 and 8 illustrate a state in which a hole H is formed in one flange FL (the lower side in Figures 6 and 8) of each column member 12X. The hole H is used, for example, to pass through a construction tool for installing a screw as part of the joining member 14 that joins the column member 12X to the face material 16 via the other flange FL (the upper side in Figures 6 and 8).

[0029] (Adhesive layer and facing material) The adhesive layer is positioned between the plate surface of the flange FL of the chord member 12Y and the column member 12X and the face material 16. The adhesive layer is positioned on the plate surface of the flange FL on the opposite side of the pair of chord members 12Y from the side where the joining member 14 used for joining the pair of column members 12X is located. The adhesive layer is also positioned on the plate surface of the flange FL on the opposite side of the pair of column members 12X from the side where the joining member 14 used for joining the pair of chord members 12Y is located.

[0030] For example, although not shown in the illustration, in Figure 7, the adhesive layer on the plate surface of flange FL of chord member 12Y is located on the left side of the plate surface of flange FL on the opposite side, upper side, rather than on the lower flange FL where the joining member 14 used for joining with the lower column member 12X is located. Also, although not shown in the illustration, in Figure 7, the adhesive layer on the plate surface of flange FL of column member 12X is located on the left side of the plate surface of the outer layer OP of flange FL on the opposite side, left side, rather than on the right flange FL where the joining member 14 used for joining with the upper chord member 12Y is located.

[0031] The adhesive layer is formed by the adhesive used in the manufacturing process of the exterior wall panel 10. The type of adhesive used for the adhesive layer can be any type, such as epoxy resin or acrylic resin. The facing material 16 is joined to the frame member 12 via the adhesive layer by being placed on top of it.

[0032] <Manufacturing method for exterior wall panels> Next, the manufacturing method of the exterior wall panel 10 according to this embodiment will be described. First, the manufacturer of the exterior wall panel 10 prepares the chord members 12Y and column members 12X that constitute the frame member 12 of this embodiment. Next, the manufacturer prepares the face material 16 which is the object to be joined to the frame member 12. The face material 16 is placed on the floor surface, for example, so that the joining surface is located on the upper side.

[0033] Next, the manufacturer applies adhesive to the flange FL of the joint surface of the prepared chord member 12Y and column member 12X. In this embodiment, the adhesive is applied to the chord member 12Y and column member 12X while they are still separate and not joined together. Next, the manufacturer places the adhesive-coated chord member 12Y and column member 12X in predetermined positions on the joint surface of the face material 16.

[0034] Specifically, the manufacturer first attaches the flange on one side of each of the pair of channel steel columns 12X to the facing material 16, where the adhesive 18 is applied (the lower side of the column 12X in Figure 9(A)), as shown in Figure 9(A). Similarly, the central column 12X in the left-right direction in Figure 1 is also attached to the facing material 16 between the pair of column 12X.

[0035] Next, the manufacturer attaches the flange on one side of each of the pair of Z-shaped chord members 12Y (the lower side of the chord member 12Y in Figure 9(A)), to the face material 16, while simultaneously placing the flange on the other side (the upper side of the chord member 12Y in Figure 9(A)) over the end of the column member 12X attached to the face material 16 from above. As a result, as shown in Figure 9(B), the pair of channel steel column members 12X and the pair of Z-shaped chord members 12Y overlap. Four corner sections are formed by the overlapping portions of both ends of the pair of chord members 12Y and both ends of the pair of channel steel column members 12X.

[0036] In this embodiment, as described above, the assembly was carried out in the order that the column member 12X was bonded to the facing material 16, and then the Z-shaped steel of the chord member 12Y was placed over the end of the column member 12X and bonded to the facing material 16. However, the order of assembly is not limited to this in this disclosure. For example, the assembly may be carried out in the order that one flange of the chord member 12Y of the Z-shaped steel is first bonded to the facing material 16, and then the end of the column member 12X is inserted into the space formed between the other flange of the chord member 12Y and the facing material 16. In other words, a method in which the chord member 12Y is first bonded to the facing material 16, and then the column member 12X is slid to form an overlapping portion is also not excluded.

[0037] However, before the end of the column member 12X is fully inserted into the space formed between the flange of the chord member 12Y and the face material 16, the adhesive 18 of the column member 12X comes into contact with the face material 16. As a result, as the column member 12X slides, the adhesive 18 that was previously applied to the insertion end of the column member 12X may not be able to keep up with the sliding, or it may adhere to the face material 16 and move from the column member 12X to the face material 16.

[0038] Next, the manufacturer joins the chord member 12Y and the column member 12X using the joining member 14. The manufacturer also joins the chord member 12Y and the column member 12X to the facing material 16 using the joining member 14. The above series of steps constitutes the manufacturing method of the exterior wall panel 10 according to this embodiment.

[0039] Furthermore, the order in which the joining work between the chord member 12Y and the column member 12X using the joining member 14, and the joining work between the chord member 12Y and the column member 12X, respectively, and the facing material 16 using the joining member 14, may be performed. Alternatively, the two works may be performed in parallel. That is, after the joining work between the chord member 12Y and the column member 12X using the joining member 14 at one corner is completed, the joining work using the joining member 14 to connect the chord member 12Y or column member 12X to the facing material 16 in a continuous section of that corner may be performed.

[0040] For example, the manufacturer may perform the joining work using the joining members 14 while sequentially moving the position of the joining members 14 along the four sides of the rectangular frame member 12 in a circular motion (in other words, like drawing in a single continuous line). By performing the joining work using the joining members 14 while moving in a circular motion, the manufacturer's travel distance can be minimized.

[0041] (Effects and Benefits) In this embodiment, the chord members 12Y and column members 12X, both made of plated steel sheets, are mechanically joined using the joining member 14. Therefore, it is possible to assemble the rust-proofed frame members 12 without using welding to join the chord members 12Y and column members 12X. As a result, the burden of frame assembly work on the steel frame members 12 can be reduced compared to when welding is used to join the chord members 12Y and column members 12X. In addition, when welding pre-plated steel materials, plating repair is required at the welded areas, which increases the labor involved in construction, but in this embodiment, plating repair is not required, thus reducing the labor involved in construction.

[0042] Furthermore, in this embodiment, adhesive can be applied to the chord members 12Y and column members 12X individually. Therefore, compared to the case where the object to be applied is the frame member 12, the placement space and work space required for adhesive application can be kept compact. As a result, the burden of adhesive application work can be reduced.

[0043] In this regard, when joining a rectangular frame member 12 and a facing material 16 with adhesive, for example, first, the frame member 12 is placed on the floor so that the adhesive-coated surface is facing upwards. Then, after adhesive has been applied to all four sides of the board surface, the frame member 12 is lifted by a crane or the like and moved to the vicinity of the facing material 16, which is to be joined. The facing material 16 is placed on the floor so that, for example, the joining surface is facing upwards.

[0044] Then, the frame member 12 is lowered from above the panel 16 toward the panel 16 with the adhesive-coated surface facing downwards. In this way, the burden of inverting the frame member 12, which is assembled in a rectangular shape, can be incurred. On the other hand, in this embodiment, since adhesive can be applied to both the chord member 12Y and the column member 12X, the burden of inverting the frame member 12, which is assembled in a rectangular shape, is eliminated. Therefore, the manufacturing burden of the exterior wall panel 10 can be reduced.

[0045] Furthermore, in this embodiment, since the chord members 12Y and column members 12X can each be bonded to the facing material 16 in their individual state, the assembly work of the frame members 12 and the joining work of the frame members 12 and the facing material 16 can be carried out in parallel in terms of time on only one side of the facing material 16. In other words, when bonding the chord members 12Y and column members 12X to the joining surface of the facing material 16, they can be arranged so that a rectangle is formed on the joining surface of the facing material 16. This reduces the manufacturing time of the exterior wall panel 10.

[0046] Furthermore, in this embodiment, during the manufacturing process of the exterior wall panel 10, at the corner portion between the Z-shaped steel chord 12Y and the channel steel column 12X, the end of the column 12X is inserted into the space between one flange FL of the Z-shaped steel and the facing material 16. Here, for example, if the chord 12Y is a channel steel, and at the corner portion the end of the channel steel of the column 12X is inserted inside the pair of flanges FL of the channel steel of the chord 12Y, then, as is, the joint surface between the flange FL of the channel steel of the chord 12Y and the facing material 16 of the channel steel of the column 12X will be misaligned in the thickness direction by the thickness of the flange FL of the channel steel of the chord 12Y. In other words, unevenness will occur.

[0047] To avoid unevenness, for example, it would be necessary to reduce the diameter of the end of the channel steel of the column member 12X by the thickness of the flange FL of the channel steel of the chord member 12Y by drawing. In this embodiment, however, since the end of the column member 12X is inserted between one flange FL of the Z-shaped steel and the face material 16, it is easy to align the joint surface of the channel steel of the column member 12X on the face material 16 side of one flange FL with the joint surface of the face material 16 side of the other flange FL, with the web WB of the Z-shaped steel of the chord member 12Y in between. For this reason, compared to the case where the chord member 12Y is a channel steel and the end of the channel steel of the column member 12X is inserted inside the pair of flanges FL of the channel steel of the chord member 12Y at the corner, drawing of the end of the column member 12X is unnecessary, thus reducing the manufacturing burden.

[0048] Furthermore, in this embodiment, each flange FL of each channel steel of a pair of column members 12X has a strip-shaped base BP continuous with the web WB, a folded portion FP, and a strip-shaped outer layer OP. The folded portion FP and the outer layer OP concentrate the steel material at the outer edge of the cross-section, which is effective in resisting bending. As a result, the bending performance per unit weight is enhanced, and as a result, it becomes possible to compensate for the bending performance that decreases due to the miniaturization of the cross-section. In other words, the depth of the column member 12X (in other words, the length along the flange FL width) can be reduced, making it possible to reduce the thickness of the exterior wall panel 10.

[0049] In this specification, "bending performance" refers to the performance of a member, including its rigidity and strength against bending. The meaning of "bending performance" in this specification is the same as the meaning of "bending resistance" disclosed in Japanese Patent Application Publication No. 2023-110433, which was referenced for the specifications of the externally folded channel steel.

[0050] Furthermore, when subjected to bending, the folded outer layer OP of the compression-side flange deforms so as to be pressed against the inner base BP (in other words, it is contact-restrained), thereby suppressing local buckling of the bent flange FL. As a result, structural performance can be ensured without integrating the outer layer OP and the base BP by welding or other means.

[0051] (modified version) As shown in the modified exterior wall panel 10A in Figure 10, in this disclosure, a horizontal member 12H extending parallel to the chord member 12Y may be arranged inside the rectangular frame member 12A. As shown in Figure 11, notches C are formed at each of the left and right ends of the horizontal member 12H. Specifically, the notches C are formed in the web WB and the lower flange FL, except for the upper flange FL. In the modified example, the horizontal member 12H and the column member 12X are mechanically joined by arranging a joining member 14 inside the upper flange FL, which does not have a notch C.

[0052] Although not shown in the illustration, an adhesive layer is placed between the outer surface of the lower flange FL of the horizontal member 12H on the side of the facing material 16 and the outer surface of the facing material 16 on the side of the horizontal member 12H in Figure 10. The other components of the modified exterior wall panel 10A are the same as those of the exterior wall panel 10 according to this embodiment, so a redundant explanation is omitted. Also, the effects of the modified exterior wall panel 10A are the same as those of the exterior wall panel 10 according to this embodiment, so a redundant explanation is omitted.

[0053] <Other Embodiments> While the embodiments described above illustrate the present disclosure, this description is not intended to limit the disclosure. Those skilled in the art should be able to see from this disclosure various alternative embodiments, examples, and operational techniques. This disclosure includes various embodiments not described above, and the technical scope of this disclosure is defined solely by the inventive features of the claims that are reasonable given the above description.

[0054] ≪Note≫ The following embodiments are conceptualized herein.

[0055] Embodiment 1 is, A rectangular frame member comprising: a pair of elongated Z-shaped steel members, each formed from a single plated steel sheet and having a web and a pair of flanges, arranged parallel to each other with a gap between them; a pair of elongated channel steel members, each formed from a single plated steel sheet and having a web and a pair of flanges; and a joining member that mechanically joins the overlapping flanges of the chord members and the column members at their respective longitudinal ends; An adhesive layer is provided on the plate surface of the flange opposite to the side where the connecting member of each of the pair of chord members is located, and on the plate surface of the flange opposite to the side where the connecting member of each of the pair of column members is located. A surface material joined to the frame member by being placed on the adhesive layer, Exterior wall panels equipped with these features.

[0056] Embodiment 2 is, One or more flanges of the channel steel of at least one of the pair of column members are The channel steel has a strip-shaped base that is continuous with the web, The folded portion located at the end opposite to the web of the base, A strip-shaped outer layer portion is positioned on the outer surface side of the base portion in the flange width direction and extends parallel to the base portion from the folded portion toward the web, Having, An exterior wall panel as described in Embodiment 1. [Explanation of Symbols]

[0057] 10,10A Exterior wall panels 12,12A Frame members 12X pillar material 12Y string material 12H Horizontal beam material 14 Joining members 16 Surface materials 18 Adhesives BP base C Notch FL flange FP (Fitted Point) H hole OP outer layer WB Web

Claims

1. A rectangular frame member comprising: a pair of elongated Z-shaped steel members, each formed from a single plated steel sheet and having a web and a pair of flanges, arranged parallel to each other with a gap between them; a pair of elongated channel steel members, each formed from a single plated steel sheet and having a web and a pair of flanges; and a joining member that mechanically joins the overlapping flanges of the chord members and the column members at their respective longitudinal ends; An adhesive layer is provided on the plate surface of the flange opposite to the side where the connecting member of each of the pair of chord members is located, and on the plate surface of the flange opposite to the side where the connecting member of each of the pair of column members is located. A surface material joined to the frame member by being placed on the adhesive layer, Equipped with, The web of the chord member is separated from the column member without contacting it. The flange of the chord member does not overlap with the flange of the column member on the side where it is attached to the surface material, and overlaps with the flange of the column member on the side opposite to the side where it is attached to the surface material. The aforementioned joining member is an exterior wall panel that mechanically joins only the overlapping flanges between the chord member and the column member.

2. One or more flanges of the channel steel of at least one of the pair of column members are The channel steel has a strip-shaped base that is continuous with the web, The folded portion located at the end opposite to the web of the base, A strip-shaped outer layer portion is positioned on the outer surface side of the base portion in the flange width direction and extends parallel to the base portion from the folded portion toward the web, Having, The exterior wall panel according to claim 1.

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