JP2008280787A - Joint structure of bearing wall made of lightweight shape steel sheet and foundation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rational joint structure of a bearing wall made of a lightweight shape steel sheet and a foundation. <P>SOLUTION: The joint structure of the bearing wall made of the lightweight shape steel sheet and the foundation is to fix a vertical frame member of the bearing wall made of the lightweight shape steel sheet to the foundation. A joint metal piece 1 provided with a base plate 4 having a plurality of anchor bolt insertion holes and a joint vertical plate 7, the lower part of which is fixed to the base plate 4, is buried in the concrete foundation 2. Anchor bolts 12 are inserted into the base plate 4 and a lower frame member 9 of the bearing wall 10 so that the bearing wall 10 may be fixed to the concrete foundation 2 by female screw members mounted on the anchor bolts 12. The joint vertical plate 7 is inserted into the lower frame member 9 of the bearing wall 10. The joint vertical plate 7 and the vertical frame member 8 are joined to each other by metal fittings. The axial force applied to the vertical frame member 8 is transmitted to the concrete foundation 2 via the joint metal piece 1 provided with the base plate 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a steel house (a steel house is usually a steel-based panel constructed by combining a frame material made of a thin lightweight steel with a plate thickness of 0.4 mm or more and less than 2.3 mm, and a structural surface material to the frame material. A thin-walled lightweight steel structure bearing wall and foundation used for a building structure such as a house or a non-residential building structure that uses a thin-walled lightweight structure bearing wall. It relates to the joint structure.

  Conventionally, as shown in FIGS. 11 to 13, a vertical frame member 8 in a load-bearing wall (panel) 10 is drilled in a vertical portion 23 in a hole-down hardware 20 as a joining structure of a thin-walled lightweight steel structure bearing wall and foundation. With the screw 24 fixed and the hole-down hardware 20 floating from the lower frame material 9, the upper part of the anchor bolt 21 is inserted into the lower horizontal portion 25 of the hole-down hardware 20 and the lower frame material 9, and the washer and spring washer are attached. A joint structure is known that is attached and fastened to the concrete foundation 2 via an anchor bolt 21 by tightening a nut 16 (see, for example, Patent Document 1).

  As described above, when the concrete foundation 2 and the bearing wall 10 on the first floor are joined, the hole down hardware 20 is joined to the vertical frame member 8 and connected to the anchor bolt 21 embedded in the concrete foundation 2. When the horizontal force or wind load (design external force) at the time of the earthquake acts on the building, the axial force F of the vertical frame member 8 is transmitted to the concrete foundation 2.

  In the joining structure as described above, in order to fix the anchor bolt 21 to the lower horizontal portion 25 of the hole-down hardware 20, the anchor bolt 21 is attached with a large eccentricity G from the web 8a of the vertical frame member 8 to the inside of the load bearing wall. Therefore, an eccentric force (bending moment) acts on the axial force of the vertical frame member 8 and the bending deformation of the vertical frame member 8 also increases. Therefore, it is necessary to design in consideration of this, and the hole-down hardware 20 In addition to the enlargement of the anchor bolt 21, the eccentric G causes the pull-out force (longitudinal) to be applied to the drill screw 24 that fixes the vertical portion 23 of the hole-down hardware 20 and the vertical frame member 8 due to the eccentric G. Since the peeling force (F1 acting on the portion 23) F1 acts, there has been a problem that the construction cost becomes high because the portion is joined by using a lot of drill screws 24.

  Also, for horizontal force F2 acting on the building, the concrete foundation 2 requires drilling with a concrete drill and drilling with a hole saw in the lower frame material. Post-installed anchor bolts 22 are spaced at intervals of about 1 m. The structure is such that it is transmitted by being simultaneously driven into the lower frame material (horizontal frame material) 9 and the concrete foundation 2 which are in contact with the thin plate lightweight section steel 2. In this joining, the number of post-installed anchor bolts 22 is large, and the post-installed anchor bolts 22 are driven after the vertical holes 26 are made in the lower frame material (horizontal frame material) 9 and the concrete foundation 2. There was also a problem that the construction work was complicated, the construction effort was great, and the construction cost was high.

  In addition, when it becomes a 3rd or 4th floor building, the axial force acting on the vertical frame member 8 on the 1st floor increases, and when a horizontal force acts on the building during an earthquake or the like, from the hole down hardware 20 to the anchor bolt 21. As a result of the eccentric axial force transmission, the local stress due to the bending force acting on the vertical frame member 8 on the first floor is also increased. Therefore, in order to eliminate the risk of buckling of the vertical frame member 8 on the first floor, Is required.

  In addition, the vertical load on the upper layer is applied to the concrete foundation 2 from the vertical frame member 8 on the first floor via the lower frame member 9, but the vertical frame member 8 is directly applied to the lower frame member 9 made of a thin lightweight steel plate. Since the lower frame member 9 is a thin plate, there is almost no vertical load dispersing action, and the vertical load acts on the concrete foundation 2 from the lower surface of the vertical frame member 8. However, since the area of the lower surface of the vertical frame member 8 is small, when it becomes a four-story building, the local stress due to the axial force of the vertical frame member 8 acting on the upper surface of the concrete foundation 2 increases, and the concrete foundation 2 is stress destroyed. There is a problem of increasing fear.

Accordingly, the axial force from the vertical frame member 8 increases as the floors of the third and fourth floors become multi-layered building structures, so it is necessary to disperse the axial force and transmit it to the concrete foundation 2.
Further, in the heavy steel structure, a joint metal 30 made of CT steel having a large arcuate portion 29 at the corner portion of the flange 27 and the web 28 as shown in FIG. 14 is provided between the concrete foundation and the H-shaped steel column. The flange 27 is used as a base portion on the concrete foundation side, and a portion indicated by a two-dot chain line is cut off on both sides of the web 28 as necessary to provide a notch step portion 31 to form a vertical portion 32 for joining, It is also known to join the joining longitudinal part 32 to a pillar web of an H-shaped steel pillar by bolts or welding.
The joint metal 30 made of CT-shaped steel has a large arc-shaped portion 29 at the corner portion between the flange 27 and the web 28. However, in the heavy steel structure, since the steel plate portions are joined together, the H-shaped steel column is floated. It is possible to design welding or bolt joining to the web 28 of the joint hardware 30 in a state in which the thin steel plate can be fixed by welding in a joining structure using a thin steel plate of a thin lightweight steel. In addition, since there is an arc-shaped portion 29 when the bolt is joined, there is a problem that eccentricity occurs, and when joining in an eccentric state, when the axial force F from the vertical frame member is transmitted to the flange 27, the light weight of the thin plate There is a problem that local buckling occurs in the vertical frame material of the shape steel, and a joining structure as in the case of a heavy steel structure cannot be employed.
JP 2005-248529 A

  As described above, in the structure in which the axial force is transmitted to the concrete foundation via the anchor bolt connected to the hole-down hardware at a position eccentric from the web in the vertical frame material, the axial force of the vertical frame material is joined to the joint hardware and the anchor bolt. The distance between the anchor bolts on both sides fixing the bearing wall to the foundation is shortened due to the eccentricity when transmitting to (in other words, the eccentric distance from the vertical portion 8a of the web to the anchor bolt is increased. On the contrary, there is a problem that the axial force increases, and a structure that does not increase the axial force as much as possible is desired.

  Further, it is desired that the joint structure has no eccentricity from the web of the vertical frame member 8 in the load bearing wall 10 as in the combination of the hole down hardware 20 and the anchor bolt 21 as described above. An axial force transmission mechanism from the vertical frame member 8 of the hardware 20 via the anchor bolt 21 and a horizontal force transmission mechanism by the post-construction anchor 22 installed at a position apart from the hole-down hardware 20, It is desirable to be able to consolidate them into one joint hardware without making them independent.

The present invention occurs when the joint metal and the anchor bolt are transmitted to each other by bringing the center of gravity of the joint hardware and the position of the web of the vertical frame material of the bearing wall close to each other without using the hole down hardware as described above. The purpose of the present invention is to provide a joint structure between a load-bearing wall and a foundation of a thin and light weight steel structure that eliminates an increase in axial force.
In addition, a thin, lightweight steel structure that can be integrated using a single joint hardware, a mechanism for transmitting axial force and a mechanism for transmitting horizontal force, which had previously been divided into two transmission mechanisms. An object of the present invention is to provide a joint structure between the bearing wall and the foundation.

In order to solve the above-mentioned problem advantageously, in the joining structure of the thin-walled lightweight steel structure bearing wall and the foundation according to the first invention, the thin plate for fixing the vertical frame material in the thin-walled lightweight steel structure bearing wall to the foundation A light-weight steel structure bearing wall-to-foundation joint structure, comprising a base plate having a plurality of anchor bolt insertion holes and a joining vertical plate whose lower part is fixed to the base plate, is a joint metal fixture. The anchor bolt is inserted through the base plate and the lower frame material in the load-bearing wall, and the load-bearing wall is fixed to the concrete foundation by the female screw member attached to the anchor bolt. The joining vertical plate is inserted, and the joining vertical plate and the vertical frame member are joined together by a joining metal fitting, and the joining vertical plate is made into a vertical frame member via a joint hardware provided with a base plate. The axial force, characterized in that so as to transmit to the concrete foundation.
In the second invention, in the joining structure of the load-bearing wall and the foundation of the thin lightweight steel structure according to the first invention, a horizontal force resistance plate protruding downward is provided below the base plate of the joint hardware. And embedded in concrete foundation.
Further, in the third invention, in the joining structure of the thin-walled lightweight steel structure bearing wall and the foundation according to the first or second invention, the thin-plate lightweight structure that fixes the vertical frame material in the thin-walled lightweight steel structure bearing wall to the foundation. A steel plate bearing wall and foundation joint structure, which includes a base plate having a plurality of anchor bolt insertion holes, and a vertical joint for joining that is inserted under the base plate so that the lower part protrudes and is fixed below the base plate. It is a joint metal fitting provided with a board.

According to the first invention, it is possible to attach the vertical plate for joining in the metal fitting to the web of the vertical frame material in the load-bearing wall of the thin and light weight steel structure without direct eccentricity. There is no increase in the axial force transmitted to the bolt, the design of the joint hardware and anchor bolt can be simplified, the design is more economical than in the case of the conventional structure, such as fewer parts and smaller parts Is possible. In addition, the structure of the joining hardware with the joining vertical plate is simple, and effects such as a simple joining structure between the load-bearing wall and the foundation of the thin and lightweight steel can be obtained.
Further, as in the second aspect of the invention, when a horizontal force resistance plate protruding downward on the lower side of the base plate is arranged so as to be embedded in the concrete foundation, axial force transmission in the vertical direction is achieved by the vertical plate for joining in the joint hardware, and horizontal The force resistance plate can transmit the horizontal force, and can resist the horizontal force acting on the building during an earthquake. Further, by embedding and fixing the joint hardware, it is possible to improve the workability by the amount that the post-construction anchor is not required as in the prior art.
Further, as in the third aspect of the invention, a metal joint comprising a base plate having a plurality of anchor bolt insertion holes, and a joining vertical plate that is inserted into the base plate so that the lower portion protrudes and is fixed to the lower side of the base plate. If it is, the lower end part of the vertical board for joining can be functioned as a horizontal force resistance board.

    Next, the present invention will be described in detail based on the illustrated embodiment.

First, an embodiment of a joint hardware 1 with a joining vertical plate used in the present invention will be described with reference to FIG. 6 and FIG. 7. A rectangular plate made of a thick steel plate having a plurality of (four in the illustrated case) anchor bolt insertion vertical holes 3 spaced in the left-right direction (longitudinal direction of the concrete foundation 2). A base plate 4 having a shape is provided, and a vertical rectangular slit 5 extending in the front-rear direction is provided at the center in the width direction of the base plate 4 so as to penetrate vertically. The anchor bolt insertion vertical hole 3 is provided symmetrically in the front-rear direction and the left-right direction in a plan view with respect to the base plate 4 and the vertical slit 5 provided in the base plate 4, and is inserted into the vertical slit 5. In addition, it is provided symmetrically in the front-rear direction and the left-right direction in a plan view with respect to a joining vertical plate 7 described later fixed to the base plate 4.
When the base plate 4 is fixed to the concrete foundation 2 (see FIG. 1) with anchor bolts and the bearing wall is fixed to the concrete foundation, the anchor bolts are arranged symmetrically in the front-rear direction and the left-right direction in plan view. When horizontal force such as time acts on the bearing wall and shear resistance is caused by the joint hardware 1, the joining vertical plate 7 serves as the center of shear, and between the vertical portion and the anchor bolt as in a conventional hole-down hardware. It has a feature that there is no eccentricity in the lateral direction. In other words, by joining the center of gravity of the joint hardware 1 and the position of the web of the vertical frame member of the load bearing wall (the position close to the back-to-back vertical frame member web boundary surface), the joint hardware 1 and It eliminates the increase in axial force that occurs when it is transmitted to the anchor bolt.

  In the vertical slit 5, a lower part of a steel joining vertical plate 7 made of a rectangular thick plate having a bolt-inserting horizontal hole 6 at an interval in the upper and lower direction is inserted in the vertical slit 5 and the base plate 4. The lower end of the joining vertical plate 7 is arranged so as to project downward from the lower side, and the joining vertical plate 7 is fixed to the base plate 4 by welding W below the base plate 4 and projects downward from the base plate 4. The portion forms a horizontal force resistance plate 7a in the horizontal direction in the form of vertical ribs.

  Further, the right and left right triangular steel plates arranged at right angles to the lower surface of the base plate 4 and at right angles to the lower surface of the base plate 4 are arranged in the widthwise central portions of the front and back surfaces of the lower end portion of the joining vertical plate 7. The lower surface of the base plate 4 and the lower end portion of the joining vertical plate 7 are fixed by welding W to form a longitudinal reinforcing vertical plate 7b to reinforce the horizontal force resistance plate 7a.

The joining vertical plate 7 is disposed at a right angle with respect to the base plate 4, and the joining vertical plate 7 is disposed so as to penetrate the base plate 4. The corner portion on the upper surface side of the base plate 4 with the vertical plate 7 is an accurate right-angled corner portion that is not a rounded portion, and as shown in FIG. The entire bottom surface of the web 8a of the vertical frame member 8 is brought into contact with the base plate 4 via the web 9a of the lower frame member 9 at a position closest to the joining vertical plate 7. In addition, since the width dimension of the base plate 4 is larger than the width dimension of the vertical frame member 8 and the lower frame member 9, the axial force from the vertical frame member 8 on the bearing wall 10 is pivoted by the base plate 4 of the thick steel plate. Power Structure that can be distributed and transmitted is possible.
As described above, the joining hardware 1 with the joining vertical plate used in the present invention includes the joining vertical plate 7 on the upper side of the base plate 4 and the horizontal resistance plate reinforced on the lower side by the reinforcing longitudinal plate 7b. 7a is provided.

  FIG. 7 shows a state in which the joint hardware 1 with the joining vertical plate is embedded in the concrete foundation 2 together with the anchor bolts 12 when the foundation concrete 11 is placed. The above-mentioned joining hardware 1 with the joining vertical plate is embedded and arranged at intervals in the longitudinal direction of the concrete foundation 2. The base plate 4 is embedded and arranged together with the anchor bolts 12 so that the upper surface level of the base plate 4 in the joining hardware 1 with the joining vertical plate is at the same position as the upper surface level of the concrete foundation 2. The force resistance plates 7a and 7b can exert a horizontal shear resistance.

Moreover, the joining vertical plate 7 in the joining hardware 1 with the joining vertical plate is arranged at a right angle to the base plate 4, and the joining hardware 1 with each joining longitudinal plate is preliminarily positioned, and is a concrete foundation. 2 for example, as shown in FIG. 8, for example, as shown in FIG. 8, the joining vertical plate 8 is positioned on the outer side of the joining vertical plate 7 so that the web 8a of the longitudinal frame member 8 on the load bearing wall 10 is located. The bearing wall 10 can be installed on the concrete foundation 2 while being guided by the plate 7.
Reference numeral 19 denotes a structural surface material such as a thin steel plate or a gypsum board, and the frame materials such as the vertical frame material 8 and the lower frame material 9 are thin lightweight steel (grooved) processed by roll forming. Member or lip-shaped channel member).

  1 to 3 show a state in which a load bearing wall (bearing wall panel) 10 is joined (fixed) to a concrete foundation 2 by using a joining hardware 1 with a joining vertical plate 7. FIG. 1 is also a cross-sectional view on the right side of FIG.

  As described above, since the joining vertical plate 7 protrudes upward from the concrete foundation 2, the joining vertical plate is provided on the bottom plate (web) 9 a of the lower frame member 9 in the bearing wall 10 at a predetermined interval. An insertion through-hole or notch 13 and an anchor bolt insertion vertical hole 14 are provided.

  The anchor bolt insertion vertical holes 14 provided in the bottom plate (web) 9a of the lower frame member 9 are similar to the anchor bolt insertion vertical holes 3 provided in the base plate at predetermined intervals in the front-rear direction and the left-right direction. For example, it is easier to perform on-site construction in advance.

  When the load bearing wall 10 is built, the load bearing wall 10 is formed by inserting the joining vertical plate 7 into the through hole or notch 13 for joining the vertical plate for joining of the bottom plate (web) 9a of the lower frame member 9. Standing on the upper surface of the concrete foundation 2, the shaft portion of the bolt 15 is inserted across the bolt insertion horizontal hole 6 of the joining vertical plate 7 in the bearing wall 10 and the bolt insertion horizontal hole of the vertical frame member 8. At the same time, the washer and nut 16 attached thereto are tightened and joined. As the bolt 15, various bolts such as medium bolts or bolts such as high strength bolts may be used.

  In addition, although illustration is abbreviate | omitted, in the circumference | surroundings where the web 8a of the vertical frame material 8 and the volt | bolt 15 of the vertical plate 7 for joining are penetrated, a recessed part is provided in the vertical plate 7 for bonding, and a convex part is provided in the vertical frame material 8. When the bolt is joined in a state where the convex portion is in close contact with the concave portion, it is possible to prevent slippage due to the concave-convex fitting, so that the two effects of friction joining and convex-concave engagement can be achieved, and the vertical frame member 8 can be reliably prevented from being displaced with respect to the joining vertical plate 7.

  4 and 5 show a second embodiment of the present invention. In this embodiment, when the width of the load-bearing wall 10 is large, the vertical frame member 8 at the intermediate portion in the width direction of the load-bearing wall 10 is used. In a corresponding position, the joint metal 1 with the joining vertical plate is embedded and fixed in the concrete foundation 2, and the middle vertical frame member 8 and the joining vertical plate 7 in the joint hardware 1 with the joining vertical plate are bolted. 15. The base plate 4 and the lower frame member 9 are fixed to the anchor bolt 12 by the nut 16 through a washer, and the bearing wall 10 is joined (fixed) to the concrete foundation 2 while being fastened with the nut 16. Has been.

  4 and FIG. 5, the other forms will be described. The structure shown in FIG. 4 and FIG. 5 is the web 8 a of the vertical frame member 8 at the end of the vertical frame member 8 in the adjacent load-bearing wall 10. Even when they are arranged back to back, such a structural form is obtained, but an appropriate cutout is provided at the end of the web 9a of the lower frame member 9 so as not to interfere with the joining vertical plate 7. The two anchor bolt insertion holes 14 may be provided at the end in the longitudinal direction of the web of the lower frame member 9 with an interval in the front-rear direction.

  After the bearing wall 10 and the concrete foundation 2 are joined in the above-described form, as shown in FIG. 9, the floor panel 16 a serving as a ceiling and the bearing wall 10 on the upper floor side are alternately installed, and 3 A building structure 17 on the floor or the fourth floor is constructed. The vertical frame members 8 of the load bearing walls 10 on the upper and lower floors are joined together by a joining device that passes through the floor panel 16a (not shown).

  8, 10, and 11, the horizontal force Q acted upon the earthquake in the form using the joining hardware 1 with the joining vertical plate 7 of the present invention and the form using the conventional hole-down hardware 20. In this case, if the pulling force or pushing force acting on the anchor bolt via the vertical frame member 8 is different, the pulling force (or pushing force) in the case of the conventional hole-down hardware 20 shown in FIG. When the width of the load bearing wall 10 (distance between the back surfaces of the web 8a of the vertical frame 8) is L and the height of the load bearing wall 10 is h, between the anchor bolts 21 that the hole down hardware 20 is fixed to the concrete foundation Since the distance is L2, the pull-out force (or pushing force) N when the hole-down hardware 20 is used is N = Q · h · L / L2.

On the other hand, as shown in FIG. 8 (b), in the embodiment using the joining hardware 1 with the joining vertical plate 7 according to the present invention, the size between the joining vertical plates 7 is equivalent to the fact that the joining vertical plate 7 is not eccentric. Since it becomes L1 and is wider than the distance L2 between the anchor bolts 21 using the conventional hole-down hardware 20, the pulling-out force (or pushing force) when using the joining hardware 1 with the joining vertical plate 7 of the present invention is used. N1 is N1 = Q · h · L / L1. Therefore, the pulling force (or pushing force) N when the conventional hole-down hardware 20 is used, and the joining hardware with the joining vertical plate 7 of the present invention. The pull-out force (or push-in force) N1 when using 1 is N2> N1, and the pull-out force (or push-in force) N1 of the joining structure of the present invention is a conventional structure using the hole-down hardware 20 Smaller than You can.
For example, when the width dimension of the load bearing wall 10 is set to 910 mm or 1000 mm, the drawing force (or pushing force) N1 can be reduced by about 10% less than the drawing force (or pushing force) N2. Accordingly, in the present invention, the thickness of the vertical frame member 8 can be reduced, the parts can be made smaller, and the hardware can be made smaller, so that an economical design is possible.

  In addition, when the building structure is the third floor or the fourth floor, for example, the thickness of the base plate 4 in the above-described joining hardware 1 with the joining vertical plate 7 is 12 mm, and the thickness of the joining vertical plate 7 is 4.5 mm. The anchor bolt 12 is M16 (SS400), the bolt 15 for joining the joining vertical plate 7 and the web 8a of the vertical frame member 8 is M16 (SS400), the triangular reinforcing vertical plate 7b is 6 mm thick, and the vertical frame The plate thickness of the material 8 is preferably 1.6 mm.

  Although illustration is omitted, when a sash is disposed in the opening between the vertical frame members 8 in the bearing wall 10, a cover member is attached to the end of the vertical frame member 8 and a wooden frame member is attached. The

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially longitudinal side view showing a first embodiment of a joint structure of a thin plate lightweight steel structure bearing wall and a concrete foundation according to the present invention. It is a vertical front view of FIG. It is a top view of FIG. It is a partially longitudinal side view which shows 2nd Embodiment of the joining structure of the load-bearing wall and concrete foundation of the thin plate lightweight shape steel structure of this invention. FIG. 5 is a plan view of FIG. 4. The embedded type metal fitting of the present invention is shown, in which (a) is a side view, (b) is a plan view, and (c) is a bottom view. FIG. 7 shows a state in which the buried type metal fitting shown in FIG. 6 is buried in a concrete foundation, in which (a) is a partially longitudinal side view and (b) is a plan view. 1 shows a state in which a load bearing wall is joined to a concrete foundation by the joining structure of the present invention, in which (a) is a side view showing a part of a structural face material, and (b) is one part of (a). FIG. It is a perspective view which shows the state which assembled the multi-story building structure by thin plate lightweight shape steel construction. It is a front view which shows the dimension of a bearing wall. 1 shows a conventional joint structure in which a load bearing wall is joined to a concrete foundation using a hole-down hardware, wherein (a) is a side view showing a part of the structural face material, and (b) is ( It is a partial cross section top view of a). It is a partially vertical side view which expands and shows a part of conventional joining structure shown in FIG. FIG. 13 is a partially longitudinal side view illustrating a state in which a vertical frame member or the like in the conventional joint structure illustrated in FIG. 12 is inclined and displaced. It is a figure which shows the form of CT shape steel in a steel frame structure, (a) is a side view, (b) is a front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joint metal fitting with a vertical plate 2 Concrete foundation 3 Vertical hole 4 for anchor bolt insertion Base plate 5 Vertical slit 6 Horizontal hole 7 for bolt insertion Joint vertical plate 7a Horizontal force resistance plate 7b Reinforcement vertical plate 8 Vertical frame material 8a Web 9 Lower frame material 9a Web 10 Bearing wall 11 Foundation concrete 12 Anchor bolt 13 Through hole or notch 14 Anchor bolt insertion vertical hole 15 Bolt 16 Nut 16a Ceiling floor panel 17 Building structure 19 Structural surface material 20 Hole down Hardware 21 Anchor bolt 22 Post-installed anchor bolt 23 Vertical portion 24 Drill screw 25 Lower lateral portion 26 Vertical hole 27 Flange 28 Web 29 Arc-shaped portion 30 Joint hardware 31 Notch step portion 32 Vertical portion for joining

Claims (3)

  A thin-walled lightweight steel structure bearing wall that is fixed to the base of a vertical frame member in a thin-walled lightweight steel structure bearing wall, and a base plate having a plurality of anchor bolt insertion holes, and a lower portion of the base plate A female screw member attached to the anchor bolt, in which a joint hardware including a vertical plate for joining is embedded in a concrete foundation, and an anchor bolt is inserted into a lower frame material in the base plate and the load-bearing wall. The bearing wall is fixed to the concrete foundation by the above, the joining vertical plate is inserted into the lower frame material in the bearing wall, the joining vertical plate and the longitudinal frame material are joined by the joining metal fitting, and the joining provided with the base plate Axial force acting on the vertical frame material is transmitted to the concrete foundation through the hardware. If structure.   2. The thin plate lightweight steel structure bearing wall according to claim 1, wherein a horizontal force resistance plate projecting downward is provided on a lower side of the base plate of the joint hardware and embedded in the concrete foundation. Joining structure with the foundation.   A thin-walled lightweight steel structure bearing wall that is fixed to the base of a vertical frame member in a thin-walled lightweight steel structure bearing wall, and a base plate having a plurality of anchor bolt insertion holes, and a lower portion of the base plate A thin plate lightweight steel structure bearing wall according to claim 1 or 2, characterized in that it is a metal joint comprising a joining vertical plate inserted so as to protrude and fixed at the lower side of the base plate. Bonding structure with the foundation.

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