JP6052252B2 - Cantilever beam support structure - Google Patents

Description

  The present invention relates to a cantilever support structure in which one end is supported by a structural housing and the other end supports a cantilever projecting in an outdoor direction.

  Generally, in a building such as a house, when a structure that protrudes to the outdoor side from the outer wall surface of the lower floor, such as a Chianti balcony or overhang, is provided on the upper floor, one end side is on the indoor side and the structure of the building The overhanging structure is supported by a cantilever beam supported by the housing and having the other end protruding in the outdoor direction.

  In such a structure, since the load of the overhanging structure is received at the position of the outer wall surface of the lower floor corresponding to the base of the overhanging structure, the cantilever is orthogonal to the outer wall surface of the lower floor. A large vertical load is applied at the position where Therefore, in order to resist this vertical load, a column material that supports the cantilever is often erected at the position of the outer wall surface of the lower floor.

  On the other hand, depending on the floor plan of the building, it is often desirable to provide an opening such as a large window on the outer wall located on the lower floor of the Chianti balcony or overhang. It is difficult to provide a column material that supports the cantilever.

  Therefore, for example, in Patent Document 1, a portal-type frame frame formed by joining a frame column and a frame beam spaced apart vertically to transmit a bending moment is arranged at the position of the outer wall surface of the lower floor. In addition, a configuration is described in which a cantilever beam is inserted between the upper and lower beam ramen beams so as to protrude outward. According to this configuration, since the inside of the ramen frame can be an opening, a relatively large opening can be provided on the outer wall surface of the lower floor, and the vertical load transmitted from the cantilever to the ramen frame is Since the rigid beam is provided at the top and the bottom, it has a large bending rigidity, and the rigid beam and the rigid column are joined so that they can resist the bending moment, so that the deflection of the rigid beam can be kept small.

JP 2008-255711 A

  However, the portal-type frame frame as described above requires a beam of upper and lower frame beams and a beam of cantilever beams between them, so a large space is required between the lower floor and the upper floor. Become. Further, in the case of the above-described rigid frame, the vertical load from the cantilever is concentrated on the lower rigid frame, and it is difficult to sufficiently suppress the deflection of the lower rigid frame.

  Therefore, the present invention provides a cantilever support structure capable of providing a large opening on the outer wall surface of the lower floor, and can sufficiently suppress vertical deflection. For the purpose.

  The cantilever support structure according to claim 1, wherein a pair of pillar members standing on the indoor side of an outer wall surface of a lower floor of a building having two or more floors and an upper end of the pillar member A pair of side cantilevers that are joined to each other and orthogonal to the outer wall surface, one end of which is fixed to the structural housing and the other end projects to the outdoor side from the outer wall surface, and the pair of side cantilever beams One or more intermediate cantilevers that are orthogonal to the outer wall surface, one end of which is fixed to the structural housing and the other end protrudes to the outdoor side of the outer wall surface, the side cantilever beam, A plurality of connecting beams respectively erected between the intermediate cantilever beams and / or between the intermediate cantilever beams adjacent to each other, and both ends are joined to the side surfaces of the pair of column members, A stepped beam joined to the lower surface of the connecting beam by a hardware having a horizontal shear resistance; It is characterized in that to obtain.

  The cantilever support structure according to claim 2 is characterized in that the hardware having the horizontal shear resistance is a hozo pipe.

  The cantilever beam support structure according to claim 3 is characterized in that two or more hozo pipes are provided at intervals for each connecting beam.

  The cantilever beam support structure according to claim 4 is characterized in that the hozo-pipe is provided at a position close to the longitudinal center of the connecting beam.

  According to the cantilever support structure of the first aspect, since the column material is not required below the intermediate cantilever, the opening on the lower floor can be made large without being obstructed by the column material. The plurality of connecting beams and the stepped beam joined to the lower surface of the connecting beam are joined by a metal object having horizontal shear resistance. When the load of the upper structure is applied to the part of the intermediate cantilever projecting to the outdoor side, the intermediate cantilever beam tends to be displaced downward in the vertical direction. Try to be deformed to curve downward between. And, as the connecting beam and the stepped beam try to bend downward, a compressive force is applied to the upper surface of each beam, a tensile force is applied to the lower surface, and the lower surface of the connecting beam and the upper surface of the stepped beam Horizontal shear force is generated between the two. Since the connecting beam and the stepped beam are joined by a hardware having horizontal shear resistance, it is possible to resist the horizontal shearing force generated between the lower surface of the connecting beam and the upper surface of the stepped beam. The deformation of the falling beam can be suppressed and the downward displacement of the intermediate cantilever can be suppressed. That is, the intermediate cantilever beam, the connecting beam, and the stepped beam can be integrated as a whole to increase the rigidity, and the proof stress against the vertical load can be increased.

  According to the cantilever support structure according to claim 2, since the hardware having horizontal shear resistance is a hozo pipe, it is embedded in the hozo hole provided in the lower surface of the connecting beam and the upper surface of the stepped beam to the outside. It can be easily joined without being exposed.

  According to the cantilever support structure according to claim 3, since two or more hozo pipes are provided at intervals for each connecting beam, the two or more hozo pipes act synergistically, and more High horizontal shear resistance can be exhibited.

  According to the cantilever support structure according to claim 4, the hozo pipe is provided at a position near the center in the longitudinal direction of the connecting beam, so that the connecting beam and the stepped beam, the intermediate cantilever beam, and the side beam are provided. In addition, it is possible to prevent the strength of the joint from being lowered without interfering with the metal for joining with the pillar material.

The partially-omission perspective view showing the outer wall surface and opening part of the cantilever beam support structure of 1st embodiment. The partially-omission perspective view which abbreviate | omitted description of the outer wall surface and opening part of the cantilever support structure of 1st embodiment. The front view explaining each junction location of the cantilever support structure of a first embodiment. The figure which shows the state before joining the connecting beam of the cantilever support structure of 1st embodiment. The perspective view which shows the external appearance structure of the cantilever support structure of 2nd embodiment. The front view explaining each joint location of the cantilever support structure of 2nd embodiment. The test body of the bending shear experiment which shows the yield strength reinforcement effect of a cantilever support structure is shown, (A) shows the test body of the lower stage of a comparative example, (B) shows the test body of the upper stage of a comparative example, (C ) Is a diagram showing a test body of an example. It is a table | surface which shows the result of the comparative example and Example of a bending shear experiment which shows the yield strength reinforcement effect of a cantilever support structure, Comprising: Table 1 shows the result of a comparative example and Table 2 shows the result of an Example. The graph which shows the deflection reduction effect of a cantilever beam support structure.

[First embodiment]
Hereinafter, a first embodiment of a cantilever beam support structure 1 according to the present invention will be described with reference to the drawings. The cantilever support structure 1 is a structure mainly provided in a wooden house having two or more floors, and although not shown, an upper structure such as a Chianti balcony or an overhang that projects outward from the outer wall 2 of the lower floor. This is a cantilever support structure 1 used when an object is provided on an upper floor. As shown in FIGS. 1 and 2, the cantilever support structure 1 includes a pair of column members 3, a pair of side cantilever beams 4 joined to the upper ends of the pair of column members 3, and a pair of An intermediate cantilever 5 provided in parallel between the side cantilever 4, a connecting beam 6 installed between the side cantilever 4 and the intermediate cantilever 5, and a pair of column members 3 at both ends. And a stepped beam 7 whose upper surface is joined to the lower surface of the connecting beam 6.

  The pair of pillar members 3 are square members of laminated material, and although not shown, the column bases are fixed by pillar receiving hardware provided on a base (not shown) and are erected on the base. The length between the column cores of the pair of column members 3 is 2000 mm, for example.

  The side cantilever 4 is a laminated timber. One end of the side cantilever 4 is fixed to a structural housing such as a pillar or a beam (not shown) on the indoor side of the building. As shown in FIGS. It is fixed to the upper end of the column 3 by a column beam joining hozo pipe 8. The other end of the side cantilever 4 protrudes to the outdoor side perpendicular to the outer wall surface 2 and supports a part of the load of an upper structure (not shown) such as a Chianti balcony or an overhang. In the present embodiment, the beam of the side cantilever 4 is 390 mm. In the present embodiment, the “outer wall surface” means the outer wall surface 2 on the lower floor.

  As shown in FIGS. 1 and 2, the intermediate cantilever 5 is a square member made of laminated material, like the side cantilever 4. One end of the intermediate cantilever 5 is fixed to a structural frame (not shown) such as a pillar or a beam on the indoor side of the building, and the other end protrudes to the outdoor side perpendicular to the outer wall surface 2 to form a Chianti balcony or over It supports a part of the load of an upper structure (not shown) such as a hang. Since the column member 3 is not provided below the position on the indoor side of the outer wall surface 2 of the intermediate cantilever 5, the cantilever support structure 1 is provided to receive a vertical load applied to the intermediate cantilever 5. It is necessary. In this embodiment, the beam of the intermediate cantilever 5 is 390 mm, similar to the beam of the side cantilever 4.

  As shown in FIGS. 3 and 4, the connecting beam 6 is a laminated timber, and has a beam length of 390 mm as in the case of the side cantilever 4 and the intermediate cantilever 5. The connecting beam 6 is installed between the side cantilever 4 and the intermediate cantilever 5. At a position on the indoor side of the outer wall surface 2 of the side cantilever 4, a beam receiver 10 a is joined to the side surface facing the intermediate cantilever 5 with a bolt. Further, beam receivers 10b are joined to the both side surfaces of the outer wall surface 2 of the intermediate cantilever 5 on the indoor side by bolts. A groove 11 into which the beam receivers 10 a and 10 b can be inserted is provided on the small face of the connecting beam 6, and is provided on the side surface of the connecting beam 6 with the beam receivers 10 a and b inserted in the groove 11. The drift pin 13 is inserted into the pin hole 12 and the connecting beam 6 is installed between the side cantilever 4 and the intermediate cantilever 5.

  The stepped beam 7 is a laminated timber, and both ends are joined to the side surfaces of the heads of the pair of column members 3 and are spanned between the pair of column members 3. A beam receiver 10c is joined to a side surface of the column member 3 facing the adjacent column member 3 by a bolt. A groove 11 into which the beam receiver 10 can be inserted is provided on the small face of the stepped beam 7, and a pin hole provided on the side surface of the stepped beam 7 with the beam receiver 10 inserted into the groove 11. The drift pin 13 is inserted into 12 and the stepped beam 7 is installed between the pair of column members 3.

  As shown in FIGS. 3 and 4, the lower surface of the connecting beam 6 and the upper surface of the stepped beam 7 are joined together by a hozo pipe 9a. The hozo-pipe 9a is a hardware having a horizontal shear resistance, and can prevent a horizontal displacement between the lower surface of the connecting beam 6 and the upper surface of the stepped beam 7. Specifically, the lower portion of the hoso-pipe 9 a is inserted into the hollow hole 14 provided on the upper surface of the step-down beam 7, and the upper portion of the hoso-pipe 9 a is disposed so as to protrude from the upper surface of the step-down beam 7. Then, by bringing the connecting beam 6 into contact with the step-down beam 7 from above, the upper portion of the hozo pipe 9a is inserted into the tenon hole 14 formed in the lower surface of the connecting beam 6. Thereafter, the drift pin 13 is inserted into the pin hole 12 provided on the side surface of the connecting beam 6 and the stepped beam 7, and the hozo pipe 9 a is fixed to the connecting beam 6 and the stepped beam 7. The beam 7 is joined. A tenon pipe 9 b is also embedded and joined between the step-down beam 7 and the intermediate cantilever beam 5.

  Three hozo pipes 9 a that join the lower surface of the connecting beam 6 and the upper surface of the stepped beam 7 are provided for each connecting beam 6 at a 125 mm pitch in the longitudinal direction of the connecting beam 6. The position of the hozo pipe 9 a is provided near the center of the connecting beam 6, and the center hozo pipe 9 a among the three hozo pipes 9 a is provided at substantially the center in the longitudinal direction of the connecting beam 6. By providing the hozo pipe 9a near the longitudinal center of the connecting beam 6 in this way, the hozo pipe 9a is not embedded near the ends of the connecting beam 6 and the stepped beam 7 and the intermediate cantilever beam is provided. 5. The beam receivers 10a, 10b, 10c for joining to the side cantilever 4 and the column member 3 can be arranged without interfering with the hozo pipe 9a, thereby preventing the strength of the joint from being lowered. it can.

  Although three hozo pipes 9a are provided for each connecting beam 6, the number of hozo pipes 9a of the present invention is not limited to three for each connecting beam 6. In the joining of the connecting beam 6 and the stepped beam 7, when two or more hozo pipes 9 a are provided, two or more hozo pipes 9 a act synergistically compared to the case where only one hozo pipe 9 a is provided, Higher horizontal shear resistance can be exhibited. That is, two or more locations on the lower surface of the connecting beam 6 and the upper surface of the stepped beam 7 are constrained so as not to move relative to each other, so that the adjacent hozo pipes 9a cannot move in the horizontal direction. Compared with the case where there is one 9a, the lower surface of the connecting beam 6 and the upper surface of the stepped beam 7 can be restrained so as not to be displaced, and the connecting beam 6 and the stepped beam 7 bend downward. Can be remarkably prevented.

  In this embodiment, the pitch of the hozo pipes 9a provided for each connecting beam 6 is 125 mm, but is preferably in the range of 75 mm to 250 mm, for example. If the hoso pipes 9a are too close to each other, there is a problem that splitting is likely to occur between the adjacent hozo holes 14, while if the hozo pipes 9a are too far apart, the hozo pipes 9a are synergistic. This is because it is difficult to act and the effect beyond the joining effect of the independent hozo pipe 9a cannot be expected.

  In this embodiment, the connecting beam 6 and the stepped beam 7 are joined by the hozo pipe 9a, but the connecting beam 6 and the stepped beam 7 are not limited to the hozo pipe 9a. Any shape that can resist the horizontal shearing force in the vertical direction may be used. In addition, since the joint pipe 9a is used, the joint hardware is not exposed to the outside, so that the appearance is good and the joint is easily joined.

  According to the cantilever beam support structure 1 of the present embodiment, the connecting beam 6 and the stepped beam 7 are joined by the hozo pipe 9 a, thereby generating a horizontal between the lower surface of the connecting beam 6 and the upper surface of the stepped beam 7. It can resist a shearing force, suppress deformation of the connecting beam 6 and the stepped beam 7, and suppress downward displacement of the intermediate cantilever beam 5. Accordingly, the intermediate cantilever 5, the connecting beam 6, and the stepped beam 7 can be integrated as a whole to increase the rigidity and the resistance to vertical load. Without providing the material 3, it is possible to receive the load of the upper structure protruding to the outdoor side. Therefore, since the pillar material 3 is not provided, the large opening 2a can be provided in the outer wall surface 2 of the lower floor.

[Second Embodiment]
As shown in FIGS. 5 and 6, the cantilever support structure 1 may be provided with two or more intermediate cantilevers 5. Hereinafter, a second embodiment of the cantilever support structure 1 provided with two intermediate cantilevers 5 will be described. In addition, since the structure of a pair of pillar material 3, a pair of side part cantilever 4, and each beam receiving object 10 is the structure similar to 1st Embodiment mentioned above, it attaches | subjects and demonstrates the same code | symbol. Omitted.

  The cantilever support structure 1 includes a pair of pillars 3, a pair of side cantilevers 4 joined to the upper ends of the pair of pillars 3, and a pair of side cantilevers 4. Two intermediate cantilevers 5 provided between the side cantilever 4 and the intermediate cantilever 5 and between the intermediate cantilevers 5 and a pair of ends. It has a stepped beam 7 which is joined to the column member 3 and whose upper surface is joined to the lower surface of the connecting beam 6.

  One end of the intermediate cantilever 5 is fixed to a structural frame (not shown) such as a pillar or a beam on the indoor side of the building, and the other end protrudes to the outdoor side perpendicular to the outer wall surface 2 to form a Chianti balcony or over The structure supports a part of the load of an upper structure (not shown) such as a hang, and two are provided in parallel between the side cantilever beams 4 at equal intervals. The distance between the beam cores between the side cantilever 4 and the intermediate cantilever 5 and between the intermediate cantilevers 5 is 1000 mm. Therefore, the distance between the column cores of the pair of column members 3 is 3000 mm.

  Three connecting beams 6 are provided, and one side cantilever 4 and the intermediate cantilever 5 adjacent to the side cantilever 4, between the intermediate cantilevers 5, and the other side cantilever. 4 and the intermediate cantilever 5 adjacent thereto are joined and bridged by beam receivers 10a and 10b provided on the opposing side surfaces. A groove 11 into which the beam receiver 10 can be inserted is provided on the small face of the connecting beam 6, and a pin hole provided on the side surface of the connecting beam 6 with the beam receivers 10 a and 10 b inserted into the groove 11. A drift pin 13 is inserted into 12 and a connecting beam 6 is installed.

  The stepped beam 7 is bridged between the pair of column members 3 with both ends joined to the side surfaces of the column heads of the pair of column members 3 by beam receivers 10. The hozo pipe 9a that joins the lower surface of the connecting beam 6 and the upper surface of the stepped beam 7 is provided near the center of each connecting beam 6 at a 125 mm pitch in the longitudinal direction of the connecting beam 6 as in the above-described embodiment. It has been.

  According to the cantilever support structure 1 of the second embodiment, the distance between the pair of pillar members 3 can be increased as compared with the case where the number of intermediate cantilever beams 5 is one. The opening 2a provided in 2 can be made even larger.

[Strengthening effect]
Next, the bending shear experiment which shows the proof strength reinforcement effect of the cantilever support structure 1 of this invention is demonstrated.

(Comparative example)
In the test body of the comparative example, the upper stage is composed of the intermediate cantilever beam 5 and the connecting beam 6, the lower stage is composed of the stepped beam 7, the upper intermediate cantilever beam 5 and the connecting beam 6, and the lower stage It is preferable to conduct a bending shear experiment without joining the falling beam 7 with the hozo pipe 9a. However, since an experiment in a state where the upper and lower stages are not joined is difficult, the experiment was performed separately on the upper stage and the lower stage.

(Comparative example, bottom)
As shown in FIG. 7A, the stepped beam 7 is a laminated timber with a beam length of 330 mm and a beam width of 120 mm. A support point Q for simply supporting the stepped beam 7 was provided so that the beam span of the stepped beam 7 was 2000 mm, and the stepped beam 7 was installed between the support points Q. The stepped beam 7 was extended from the support point Q to the outside at a position of 440 mm on both sides. And the loading point P was provided in the center of the upper surface of the step-down beam 7, and it applied monotonically downward toward the perpendicular direction until the step-down beam 7 destroyed.

  The results of the lower part of the comparative example are as shown in Table 1 of FIG. The yield strength of the stepped beam 7, which is “the strength at which fracture starts generally” or “the strength used in the design” (the strength not to be destroyed), was 104.2 kN. The maximum proof stress, which is the “proof strength at the time of complete destruction” of the stepped beam 7, was 179.4 kN. The initial rigidity of the stepped beam 7 was 19.8 kN / mm.

(Comparative example, upper row)
As shown in FIG. 7B, the intermediate cantilever beam 5 and the connecting beam 6 have a beam length of 390 mm and a beam width of 120 mm. The material length of the intermediate cantilever 5 was 500 mm. The small facet of the connecting beam 6 was joined to the central side surface in the longitudinal direction of the intermediate cantilever 5 by the beam receiver 10. And the support point Q which simply supports the connecting beam 6 was provided so that the position of the intermediate cantilever beam 5 was in the center and the beam span was 2000 mm. Both sides of the connecting beam 6 were extended from the support point Q to the outside at a position of 440 mm. And the loading point P was provided in the center of the upper surface of the intermediate cantilever beam 5, and it applied monotonic downward toward the vertical direction until one of the beams broke down.

  The result of the upper part of the comparative example is as shown in Table 1 of FIG. The yield strength of the intermediate cantilever beam 5 or the connecting beam 6, which is “the strength at which fracture starts substantially” or “the strength used in the design” (the strength that is not destroyed), was 33.47 kN. The maximum proof stress which is the “proof strength at the time of complete destruction” of the intermediate cantilever beam 5 or the connecting beam 6 was 58.62 kN. The initial rigidity of the intermediate cantilever beam 5 or the connecting beam 6 was 3.23 kN / mm.

  When the upper stage and the lower stage of the comparative example described above are simply added, the yield strength is 137.7 kN, the maximum strength is 371.9 kN, and the initial stiffness is 36.9 kN / mm. The upper stage is constituted by the intermediate cantilever beam 5 and the connecting beam 6, the lower stage is constituted by the stepped beam 7, and the upper intermediate cantilever beam 5 and the connecting beam 6 and the lower stepped beam 7 are connected to the hozo pipe 9a. It is presumed that the value in the case of not joining is approximate to this.

(Example)
Next, the bending shear experiment of the Example of this invention is demonstrated. As shown in FIG. 7C, the test body of this example is composed of the intermediate cantilever 5 and the connecting beam 6 on the upper stage, and the lower beam 7 on the lower stage. The beam 5 and the connecting beam 6 are joined to the lower stepped beam 7 by a hozo pipe 9a. Since the configuration of the upper stage and the lower stage is exactly the same as that of the comparative example described above, description thereof is omitted. The lower stepped beam 7 and the upper connecting beam 6 were joined using three hozo pipes 9a arranged at intervals of 125 mm. The hozo pipe 9a has a diameter of 31.8 mm, a height of 140 mm, a material thickness of 2.3 mm, and is joined to the stepped beam 7 and the connecting beam 6 by a drift pin 13 having a diameter of 12 mm. Further, the stepped beam 7 and the intermediate cantilever beam 5 were also joined by using one hozo pipe 9b. Then, support points Q for simply supporting the stepped beam 7 are provided so that the beam span of the stepped beam 7 is 2000 mm, and both sides of the stepped beam 7 and the connecting beam 6 are 440 mm outward from the support point Q, respectively. Stretched to position. And the loading point P was provided in the center of the upper surface of the intermediate cantilever beam 5, and it applied monotonic downward toward the vertical direction until one of the beams broke down.

  The results of the examples are as shown in Table 2 of FIG. The yield strength was 191.1 kN, the maximum strength was 371.9 kN, and the initial stiffness was 36.9 kN / mm. Therefore, compared to the simple addition of the upper and lower stages of the comparative example, this example has a yield strength of 1.39 times, a maximum strength of 1.56 times, and an initial stiffness of Since the ratio is 1.6 times, it can be seen that a reinforcing effect can be seen by joining the upper intermediate cantilever 5 and the connecting beam 6 and the lower stepped beam 7 with the hozo pipes 9a and 9b.

[Deflection reduction effect]
Next, the deflection reduction effect of the cantilever beam support structure 1 of the present invention will be described with reference to FIG. FIG. 9 is a graph showing the result of analyzing the deflection when 30 kN force is applied to the intermediate cantilever 5 in the cantilever support structure 1 in which the beam of the stepped beam 7 is changed from 150 mm to 450 mm. The circles indicate the deflection reduction effect of the embodiment of the present invention, and the one shown by the alternate long and short dash line connects the upper intermediate cantilever beam 5 and the connecting beam 6 and the lower step beam 7 to the hozo pipe. The deflection reduction effect in the case of the comparative example which was not joined by 9a is shown. Here, the deflection reduction effect is the reciprocal of the value obtained by dividing the deflection when 30 kN is applied in the example or comparative example of the present application by the deflection when 30 kN is applied only to the stepped beam 7.

  As shown in FIG. 9, it can be seen that the effect of reducing the deflection can be seen by joining the upper intermediate cantilever beam 5 and the connecting beam 6 and the lower stepped beam 7 with the hozo pipe 9a.

  Needless to say, the embodiment of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope of the idea of the present invention.

  The cantilever support structure 1 according to the present invention can be suitably used as a structure for supporting a cantilever that supports an overhang or a chianti balcony of a wooden house.

DESCRIPTION OF SYMBOLS 1 Cantilever support structure 2 Outer wall surface 3 Column material 4 Side cantilever 5 Intermediate cantilever 6 Connecting beam 7 Stepped beam 9a Hozo pipe

Claims (4)

A pair of pillars erected on the indoor side of the outer wall surface of the lower floor of the building consisting of two or more levels;
A pair of side cantilevers that are joined to the upper end of the column member, orthogonal to the outer wall surface, one end of which is fixed to the structural housing and the other end protrudes to the outdoor side from the outer wall surface;
One or more intermediate cantilevers perpendicular to the outer wall surface between the pair of side cantilever beams, one end of which is fixed to the structural housing and the other end projects to the outdoor side from the outer wall surface;
A plurality of connecting beams respectively constructed between the side cantilever and the intermediate cantilever and / or between the intermediate cantilevers adjacent to each other;
A cantilever beam support structure comprising: a stepped beam having both ends bonded to the side surfaces of the column heads of the pair of column members and bonded to a lower surface of the connecting beam by a metal having a horizontal shear resistance. .   The cantilever support structure according to claim 1, wherein the hardware having the horizontal shear resistance is a hozo pipe.   The cantilever support structure according to claim 2, wherein two or more hozo pipes are provided at intervals between each connecting beam. The cantilever support structure according to claim 3, wherein the hozo-pipe is provided at a position close to a center in a longitudinal direction of the connecting beam.

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