JP2022155956A - Connection structure of column to brace, and connection hardware connecting column to brace - Google Patents

Abstract

To provide connection structure of a column to a brace and a connection hardware allowing the brace to function immediately after a horizontal load is applied to a frame in an earthquake, and capable of forming the frame having excellent aseismic performance.SOLUTION: Connection structure 80 of a column and a brace has a brace 21 and a column 13 connected via a connection hardware 50. The connection hardware 50 has an abutting plate 51 abutting on a side face 13a of the column 13, a standing plate 52 and reinforcement ribs 53 laterally extending from the side face of the standing plate 52. The reinforcement rib 53 has at least a sloped part 53b sloped in relation to the side face 13a. A first insertion hole 54 for inserting a shaft part 41 of headed fixing means 40 is opened to the sloped part 53. The abutting plate 51 further has a second insertion hole 55 opened for inserting the shaft part 41 inserted through the first insertion hole 54. An end of the brace 21 is fixed to the standing plate 52, a head part 42 is locked to the sloped part 53b, and a part of the shaft part 41 is fixed to the column 13.SELECTED DRAWING: Figure 5

Description

TECHNICAL FIELD The present invention relates to a connection structure between a pillar and a brace, and a connection hardware that connects the pillar and the brace.

In wooden buildings constructed using the wooden frame construction method, earthquake resistance is improved by attaching braces (diagonals, braces) to the framework consisting of wooden shaft members that form the pillars, beams, foundations, etc. there is For example, there are a form in which braces are attached along diagonal lines of a rectangular frame in front view, and a form in which load-bearing walls containing braces are provided inside the frame.

Here, an example of a frame having a conventional brace will be described with reference to FIGS. 1 to 4. FIG. FIG. 1 is a front view of a frame provided with K-shaped braces, showing a state in which a horizontal load is acting during an earthquake, and FIG. 2 is an enlarged view of section II in FIG. Also, FIG. 3 is a perspective view of an example of the connection hardware, and FIG. 4 is a diagram showing the axial force-deformation characteristics of the brace during an earthquake.

The frame 60 has a beam 11, a base 14, a pair of pillars 12 and 13, and two braces 21 that are K-shaped when viewed from the front. The beam 11 and base 14 and the pillars 12 and 13 are connected to each other by connecting hardware 15 and connecting bolts 16 . In addition, a connecting metal fitting 30 is connected to the central position of one of the columns 13 via a plurality of (four as shown in FIG. 3 in the illustrated example) headed fixing means 40, and the other column 12, the beam 11 and the base are connected. Gusset plates 17 are attached to the corners 19 of the braces 14 and 14 respectively. there is The headed fixing means 40 is a member having a head portion 42 and a shaft portion 41, and is formed of screws, screws, nails, bolts, or the like.

As shown in FIG. 1, when a horizontal load Q during an earthquake acts on the frame 60, the frame 60 is displaced in the direction in which the horizontal load Q acts, and an axial force N is generated in each brace 21 when the frame 60 is displaced. Thus, displacement of the frame 60 is suppressed by each brace 21 .

As shown in FIGS. 2 and 3, the connection hardware 30 includes a rectangular contact plate 31 in plan view that contacts the side surface 13a of the column 13, and a contact plate 31 that stands upright from the contact plate 31 at the center position of the contact plate 31. and a plurality of reinforcing ribs 33 projecting laterally from the side surface of the standing plate 32. - 特許庁A fixing hole 35 is formed in the standing plate 32 , and the fixing hole 35 is aligned with a fixing hole (not shown) of the connection jig 22 , and the connection metal 30 and the brace 21 are connected by inserting the connection bolt 18 . bolted.

Further, the contact plate 31 is provided with an insertion hole 34 through which the fixing means 40 with head is inserted. The diameter t1 of the insertion hole 34 is generally adjusted to accommodate machining errors of the insertion hole 34 in the brace 21 and the contact plate 31, installation errors when attaching the contact plate 31 to the side surface 13a of the column 13, and the like. It is set to be larger by 1 mm to several mm than the diameter t2 of the shaft portion 41 of 40 .

In the connection structure 70 of the column and the brace in the conventional frame 60, the shaft portion 41 of the headed fixing means 40 is orthogonal to the longitudinal direction (vertical direction) of the column 13 through the insertion hole 34 of the contact plate 31. It is inserted in the direction (horizontal direction).

Here, Patent Literature 1 proposes a load-bearing wall structure for a wooden building provided with K-shaped braces (here, braces) shown in FIG. Specifically, in the framework of a wooden building composed of two parallel pillars and two parallel horizontal members, an energy absorber attached to the center of one of the pillars and one end A substantially V-shaped bracing is provided in which one end is attached to the energy absorber and the other end is attached to the other column or horizontal member, and the energy absorber is deformed by horizontal force to absorb energy. It is made like this. Here, also in Patent Document 1, for example, as shown in FIG. The structure is shown fixed by fixing means extending (horizontally).

JP 2011-153457 A

As shown in FIG. 1, when a horizontal load Q during an earthquake acts on the frame 60, a shear force S acts between the connection hardware 30 and the column 13 as shown in FIG. and the side surface 13a of the column 13a, the connection metal fitting 30 moves over the side surface 13 of the column 13 through the clearance (diameter t1 , t2).

That is, as shown in FIG. 4, when the connection fitting 30 slides along the side surface 13a of the column 13 by δ1, the brace 21 is also displaced (slid) by δ1 in synchronism with this. A force will be generated and the brace 21 will begin to function. Therefore, since the desired axial force N is not generated in the brace 21 from the beginning when the horizontal load Q acts on the frame 60, the displacement of the frame 60 during an earthquake can be suppressed from the beginning when the horizontal load Q acts. However, there is a problem that the energy absorption performance of the brace 21 at the time of an earthquake is lowered due to the initial slippage. This problem exists not only in a frame having a K-shaped brace 21 as in the illustrated example, but also in a form in which a single brace is arranged on a diagonal line of a rectangular frame when viewed from the front. In addition to wooden buildings constructed by the wooden frame construction method, such problems also exist in steel-framed buildings.

The present invention has been made in view of the above problems. To provide a connecting structure of a column and a brace, and a connecting metal fitting for connecting the column and the brace, which enables the brace to function from the beginning of action and form a frame excellent in earthquake resistance performance.

In order to achieve the above object, one aspect of the connection structure between a pillar and a brace according to the present invention includes:
A column and brace connection structure, wherein the brace is connected to the side of the column,
The brace and the pillar are connected via a connection metal provided on the side surface of the pillar,
The connection hardware includes a contact plate that contacts the side surface, a standing plate that stands from the contact plate, and a reinforcing rib that projects sideways from the side surface of the standing plate,
The reinforcing rib has at least an inclined portion that is inclined with respect to the side surface of the column,
A fixing hole is formed in the standing plate,
The inclined portion is provided with a first insertion hole through which the shaft portion of a headed fixing means having a head portion and a shaft portion is inserted,
The contact plate is provided with a second insertion hole through which the shaft portion inserted through the first insertion hole is further inserted,
An end portion of the brace is fixed to the fixing hole, the head portion is engaged with the inclined portion, and a part of the shaft portion inserted through the first insertion hole and the second insertion hole is It is fixed to the pillar.

According to this aspect, the reinforcing rib of the connection fitting has the inclined portion that is inclined with respect to the side surface of the column, and the inclined portion is provided with the first insertion hole through which the shaft portion of the headed fixing means is inserted, A second insertion hole is formed in the abutment plate through which the shaft portion inserted through the first insertion hole is inserted, and the head portion of the fixing means with head is engaged with the inclined portion to form the first insertion hole and the second insertion hole. is fixed to the column in a direction inclined in the longitudinal direction, so that the contact plate and the side of the column will not be damaged when shear force during an earthquake acts on the contact plate is effectively restrained by a fixing means with a head which extends obliquely and is fixed to the pillar.

That is, in the conventional connection structure, since the shaft portion of the headed fixing means is fixed in the horizontal direction orthogonal to the longitudinal direction of the column, the clearance between the insertion hole and the shaft portion when a shearing force acts. Whereas the connecting metal fittings slide on the side of the pillar only, in this aspect, the headed fixing means extends in the direction inclined in the longitudinal direction of the pillar and is fixed to the pillar. The fixing means can effectively resist the shear force along the longitudinal direction of the column, so that the brace can function from the initial stage when the horizontal load during an earthquake acts on the frame.

In addition, since the shaft portion of the headed fixing means is fixed to the column while being inserted through the two insertion holes (the first insertion hole and the second insertion hole), the extension direction of the shaft portion (fixing direction to the column) is univocally set, and there is no problem that the direction of fixing the fixing means with head to the pillar fluctuates.

Here, "the reinforcing rib has at least an inclined portion" includes both a form in which the reinforcing rib has only an inclined part and a form in which the reinforcing rib has a vertical part perpendicular to the side surface of the column, for example, in addition to the inclined part. I'm in. The reinforcing ribs originally have the function of preventing buckling of the standing plate erected from the contact plate. It has a non-slip function when a shear force is applied during an earthquake.

Also, in another aspect of the connection structure of the column and the brace according to the present invention,
In addition to the inclined portion, the reinforcing rib further has a vertical portion perpendicular to the side surface of the column.

According to this aspect, the reinforcing rib further has a vertical portion perpendicular to the side surface of the column in addition to the inclined portion, so that the vertical portion extending in the buckling direction or substantially the buckling direction of the standing plate is formed. Buckling of the standing plate can be effectively suppressed.

Also, in another aspect of the connection structure of the column and the brace according to the present invention,
The standing plate is fixed at a central position of the contact plate,
The reinforcing rib is fixed to each of the left and right wide surfaces of the standing plate.

According to this aspect, since the reinforcing ribs are fixed to the left and right wide surfaces of the standing plate, the effect of preventing buckling of the standing plate by the reinforcing ribs is further enhanced. Since the connection hardware is fixed to the pillar by a plurality of headed fixing means, the slip prevention effect of the connection hardware (and the brace) during an earthquake is further enhanced.

Also, in another aspect of the connection structure of the column and the brace according to the present invention,
It is characterized in that the extending directions of the brace and the shaft are the same or substantially the same.

According to this aspect, since the extending direction of the brace and the extending direction of the shaft portion of the headed fixing means are the same or substantially the same, when an axial force (pull) acts on the brace, this axial force On the other hand, the headed fixing means can effectively resist the pull-out force (axial force from the brace) that causes the connection metal to be pulled out from the pillar.

Another aspect of the connection structure of the pillar and brace according to the present invention is
Of the two pillars arranged with an interval, the connecting metal fitting is disposed in the middle position of one of the pillars in the longitudinal direction, and the upper and lower ends of the other pillar and the connecting metal fitting are connected to the two pillars. having a K-braces to which the braces connect;
The standing plate is provided with two fixing holes to which the ends of the two braces are fixed,
The reinforcing ribs are fixed at positions corresponding to the two braces on the left and right wide surfaces of the standing plate,
It is characterized in that the contact plate is provided with the second insertion holes corresponding to the first insertion holes of the respective reinforcing ribs.

According to this aspect, the left and right wide surfaces of the standing plate are provided with reinforcing ribs at positions corresponding to the two braces constituting the K-shaped brace, and the contact plate is provided with the first insertion holes provided in the respective reinforcing ribs. By opening a second insertion hole corresponding to the pillar, the connecting metal fitting is firmly fixed to the pillar by a total of four headed fixing means extending obliquely in the longitudinal direction of the pillar. , can form the connection structure of columns and braces.

Another aspect of the connection structure of the pillar and brace according to the present invention is
The pillars are wooden pillars, and the method is characterized in that it is applied to a wooden frame structure having wooden beams and the wooden pillars.

According to this aspect, the brace functions effectively from the beginning when a horizontal load during an earthquake acts, and therefore a wooden frame structure with excellent earthquake resistance performance can be formed.

In addition, one aspect of the connection hardware for connecting the pillar and the brace according to the present invention is
Connecting hardware that is attached to the side of the pillar and connects the pillar and the brace,
a contact plate abutting against the side surface, a standing plate erected from the contact plate, and a reinforcing rib projecting laterally from the side surface of the standing plate;
The reinforcing rib has at least an inclined portion that is inclined with respect to the side surface of the column,
The standing plate has a fixing hole to which the end of the brace is fixed,
The inclined portion is provided with a first insertion hole in which the head portion of a headed fixing means having a head portion and a shaft portion is engaged and the shaft portion is inserted,
The contact plate is characterized by having a second insertion hole through which the shaft portion inserted through the first insertion hole is further inserted.

According to this aspect, the reinforcing rib of the connection fitting has the inclined portion that is inclined with respect to the side surface of the column, and the inclined portion is provided with the first insertion hole through which the shaft portion of the headed fixing means is inserted, A second insertion hole is formed in the abutment plate through which the shaft portion inserted through the first insertion hole is inserted, and the head portion of the fixing means with head is engaged with the inclined portion to form the first insertion hole and the second insertion hole. By fixing the shank inserted through the pillar to the column, the slanted portion of the reinforcing rib allows the shank to extend in a direction inclined in the longitudinal direction of the column. As a result, the sliding of the contact plate when the shear force during an earthquake acts between the contact plate and the side of the column is prevented by the headed fixing means that extends obliquely and is fixed to the column. effectively suppressed.

As can be understood from the above description, according to the connection structure and the connection hardware of the column and the brace of the present invention, the frame structure in which the column and the brace are connected via the connection hardware fixed to the column by the fixing means with the head. In this case, the brace can function from the beginning when the horizontal load of the earthquake acts on the frame, and a frame with excellent earthquake resistance performance can be formed.

FIG. 2 is a front view of a conventional frame with K-bracing, showing a horizontal load during an earthquake. FIG. 2 is an enlarged view of part II of FIG. 1; FIG. 10 is a perspective view of an example of a conventional connecting metal fitting applied to a conventional frame; FIG. 10 is a diagram showing the axial force-deformation characteristics of a brace applied to a conventional frame during an earthquake. FIG. 4 is a front view of a frame having a connection structure of columns and braces according to the embodiment, showing a state where a horizontal load is applied during an earthquake. FIG. 6 is an enlarged view of the VI section of FIG. 5 , showing an enlarged view of a state in which a connecting metal fitting for connecting a pillar and a brace according to the embodiment is connected to the pillar. It is a perspective view of an example of the connection hardware which connects the pillar and brace which concern on embodiment. FIG. 4 is a diagram showing the axial force-deformation characteristics of a brace, which forms the connection structure of the column and the brace according to the embodiment, during an earthquake.

Hereinafter, a connection structure between a column and a brace according to an embodiment and a connection metal fitting for connecting the column and the brace will be described with reference to the accompanying drawings. In addition, in the present specification and drawings, substantially the same components may be denoted by the same reference numerals, thereby omitting duplicate descriptions.

[Connection structure of pillar and brace according to embodiment, and connection hardware for connecting pillar and brace]
With reference to FIGS. 5 to 8, an example of the connection structure of the pillar and the brace according to the embodiment and an example of the connection hardware for connecting the pillar and the brace will be described. Here, FIG. 5 is a front view of a frame having a connection structure of columns and braces according to the embodiment, showing a state in which a horizontal load is acting during an earthquake, and FIG. 5 is an enlarged view of the VI section of FIG. 5, and is an enlarged view showing a state in which the connection hardware for connecting the pillar and the brace according to the embodiment is connected to the pillar. Moreover, FIG. 7 is a perspective view of an example of a connection hardware that connects a column and a brace according to the embodiment, and FIG. FIG. 4 shows force-deformation characteristics;

In contrast to the conventional column-brace connection structure 70 shown in FIG. 1, the column-brace connection structure 80 according to the embodiment shown in FIG. However, due to the difference in the configuration of the connection metal fittings 30 and 50, the extending direction of the headed fixing means 40 for fixing the connection metal fitting 50 to the column 13 is different.

The frame 65 shown in FIG. 5 is a wooden frame frame, and has a beam 11, a base 14, a pair of pillars 12 and 13, and two braces 21 that are K-shaped when viewed from the front. The beam 11 and base 14 and the pillars 12 and 13 are connected to each other by connecting hardware 15 and connecting bolts 16 . In addition, a connecting metal fitting 50 is connected to the central position of one of the columns 13 via a plurality of (four as shown in FIG. 7 in the illustrated example) headed fixing means 40, and the other column 12, the beam 11 and the base are connected to each other. Gusset plates 17 are attached to the corners 19 of the braces 14 and 14 respectively. there is In addition to the illustrated example, the frame to which the connection structure 80 is applied also has a form in which braces are attached along the diagonal of the frame which is rectangular in front view, and a load-bearing wall with built-in braces inside the frame. It may be in the form of being provided, and in these forms as well, the connection hardware 50 of the illustrated example or its modification (not shown) is applied between the brace and the column.

The extending direction L2 of the headed fixing means 40 is set to be substantially the same as the extending direction L1 of the two braces 21. is. Here, the headed fixing means 40 in the illustrated example is a screw, but the headed fixing means may be a screw, a nail, a bolt, or the like. In the conventional connection structure 70, the headed fixing means 40 extends in the horizontal direction orthogonal to the longitudinal direction of the column 13, as shown in FIG. Here, the extending directions L1 and L2 being substantially the same means that the two extending directions have an angle difference of about 20 degrees or less, for example. The extending directions L1 and L2 may be set in the same direction as well as in the substantially same direction with a slight difference as in the illustrated example.

As shown in FIGS. 6 and 7, the connection hardware 50 includes a contact plate 51 rectangular in plan view that contacts the side surface 13a of the column 13, a standing plate 52 erected from the contact plate 51, and a standing plate It has a total of four reinforcing ribs 53 projecting sideways from the left and right side surfaces (left and right wide surfaces) of 52 .

The standing plate 52 has two fixing holes 56 to which the ends of the two braces 21 are fixed. A set of two reinforcing ribs 53 (a total of two sets of reinforcing ribs 53) is fixed at each position.

As shown in FIG. 7, the reinforcing rib 53 has a vertical portion 53a extending vertically from the upper end of the standing plate 52 to the contact plate 51 (as shown in FIG. 6, the vertical portion 53a extends in the longitudinal direction of the column 13). and an inclined portion 53b that bends from the vertical portion 53a to the outside of the standing plate 52 and extends obliquely in the longitudinal direction of the column 13. As shown in FIG.

As shown in FIGS. 6 and 7, the inclined portion 53b is provided with a first insertion hole 54 through which the shaft portion 41 of the headed fixing means 40 is inserted. A second insertion hole 55 is formed through which the shaft portion 41 inserted through the hole 54 is further inserted.

As shown in FIG. 6, the extension direction L2 of the shaft portion 41 inserted through the two insertion holes of the first insertion hole 54 and the second insertion hole 55 is uniquely set, and the desired extension direction L2 is determined. The shaft portion 41 extending to the side is inserted into the column 13 . Since the extension direction L2 of the shaft portion 41 is uniquely set in this way, there is no problem that the fixing means 40 with head attached to the column 13 is fixed in a different direction. Also, in driving the headed fixing means 40, the two first through-holes 54 and the second through-holes 55 serve as guide holes in the driving direction, so that driving workability is improved.

As shown in FIG. 6, the shaft portion 41 of the headed fixing means 40 is inserted through the corresponding first insertion hole 54 and second insertion hole 55 and is inserted into the column 13, and the head portion 42 is inserted into the inclined portion 53b. is engaged.

The head portion 42 of the fixing means 40 with a head is engaged with the inclined portion 53b, and a part of the shaft portion 41 inserted through the first insertion hole 54 and the second insertion hole 55 is inclined with respect to the column 13 in its longitudinal direction. By being fixed in the direction L2, the sliding of the contact plate 51 when the shear force S during an earthquake acts between the contact plate 51 and the side surface 13a of the column 13 extends in the oblique direction L2. It is effectively restrained by the headed fixing means 40 which are fixed to the column 13 at the same time.

For example, in the conventional connection structure 70 shown in FIG. 2, since the shaft portion 41 of the headed fixing means 40 is fixed in the horizontal direction orthogonal to the longitudinal direction of the column 13, shearing in the direction orthogonal to the horizontal direction When the force S is applied, the connection fitting 30 slides on the side surface 13a of the column 13 by the clearance between the insertion hole 34 and the shaft portion 41, whereas in the connection structure 80 shown in FIG. Since the headed fixing means 40 extends in the direction L2 inclined in the longitudinal direction of the column 13 and is fixed to the column 13, when the shear force S along the longitudinal direction of the column 13 acts, the headed fixing means The effective resistance of 40 prevents the connection hardware 50 and brace 21 from slipping.

Therefore, in the conventional connection structure 70, as shown in FIG. As for the connection structure 80, the connection hardware 50 and the brace 21 are prevented from slipping when the horizontal load Q during an earthquake acts on the frame 65. Therefore, as shown in FIG. The brace 21 functions from the initial stage when the horizontal load Q acts on the frame 65 . As a result, the frame 65 (a wooden frame frame) having excellent earthquake resistance performance can be formed.

In addition, in the connecting hardware 50, the reinforcing rib 53 has the vertical portion 53a and the inclined portion 53b, so that the vertical portion 53a functions mainly to prevent buckling of the standing plate 52 erected from the contact plate 51. , the inclined portion 53b (the first insertion hole 54) extends the headed fixing means 40 along with the second insertion hole 55 of the contact plate 51 in the desired oblique direction L2 and fixes it to the pillar 13, so that it is possible to prevent earthquakes. It exhibits a slip prevention function of the connecting hardware 50 and the brace 21 when a shearing force is applied.

It should be noted that other embodiments may be possible in which other components are combined with the configurations described in the above embodiments, and the present invention is not limited to the configurations shown here. Regarding this point, it is possible to change without departing from the gist of the present invention, and it can be determined appropriately according to the application form.

11: Beam 12, 13: Column 13a: Side 14: Base 15: Connection hardware 16: Connection bolt 17: Gusset plate 18: Connection bolt 19: Corner 21: Brace 22: Connection jig 30: Connection hardware 31: Contact Contact plate 32: Standing plate 33: Reinforcement rib 34: Insertion hole 35: Fixing hole 40: Fixing means with head 41: Shaft 42: Head 50: Connection metal fitting 51: Contact plate 52: Standing plate 53: Reinforcing rib 53a : Vertical portion 53b: Inclined portion 54: First insertion hole 55: Second insertion hole 56: Fixed hole 60, 65: Frame 70, 80: Connection structure (connection structure) between column and brace
Q: Horizontal load N: Axial force S: Shear force

Claims (7)

A column and brace connection structure, wherein the brace is connected to the side of the column,
The brace and the pillar are connected via a connection metal provided on the side surface of the pillar,
The connection hardware includes a contact plate that contacts the side surface, a standing plate that stands from the contact plate, and a reinforcing rib that projects sideways from the side surface of the standing plate,
The reinforcing rib has at least an inclined portion that is inclined with respect to the side surface of the column,
A fixing hole is formed in the standing plate,
The inclined portion is provided with a first insertion hole through which the shaft portion of a headed fixing means having a head portion and a shaft portion is inserted,
The contact plate is provided with a second insertion hole through which the shaft portion inserted through the first insertion hole is further inserted,
An end portion of the brace is fixed to the fixing hole, the head portion is engaged with the inclined portion, and a part of the shaft portion inserted through the first insertion hole and the second insertion hole is A connection structure between a pillar and a brace, characterized in that the pillar and the brace are fixed to the pillar. 2. The connection structure between a column and a brace according to claim 1, wherein said reinforcing rib further has a vertical portion perpendicular to the side surface of said column in addition to said inclined portion. The standing plate is fixed at a central position of the contact plate,
3. The structure for connecting a pillar and a brace according to claim 1, wherein the reinforcing ribs are fixed to the left and right wide surfaces of the standing plate, respectively. 4. The connection structure of a pillar and a brace according to claim 1, wherein the extending directions of the brace and the shaft are the same or substantially the same. Of the two pillars arranged with an interval, the connecting metal fitting is disposed in the middle position of one of the pillars in the longitudinal direction, and the upper and lower ends of the other pillar and the connecting metal fitting are connected to the two pillars. having a K-braces to which the braces connect;
The standing plate is provided with two fixing holes to which the ends of the two braces are fixed,
The reinforcing ribs are fixed at positions corresponding to the two braces on the left and right wide surfaces of the standing plate,
5. The contact plate according to any one of claims 1 to 4, characterized in that said contact plate is provided with said second insertion holes corresponding to said first insertion holes of said reinforcing ribs. column and brace connection structure. 6. The column and brace connection structure according to any one of claims 1 to 5, characterized in that the column is a wooden column and is applied to a wooden frame structure having a wooden beam and the wooden column. . Connecting hardware that is attached to the side of the pillar and connects the pillar and the brace,
a contact plate abutting against the side surface, a standing plate erected from the contact plate, and a reinforcing rib projecting laterally from the side surface of the standing plate;
The reinforcing rib has at least an inclined portion that is inclined with respect to the side surface of the column,
The standing plate has a fixing hole to which the end of the brace is fixed,
The inclined portion is provided with a first insertion hole in which the head portion of a headed fixing means having a head portion and a shaft portion is engaged and the shaft portion is inserted,
A connection metal for connecting a column and a brace, wherein the abutment plate is provided with a second insertion hole through which the shaft part inserted through the first insertion hole is further inserted.

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