JP4886763B2 - guide pin - Google Patents

Description

The present invention relates to a guide pin .

In the unit building, as described in Patent Document 1, pins are joined based on the column base of a building unit made of a frame structure in which columns and beams are welded.
JP-A-8-302823 (3 pages, Fig. 2)

  In the prior art, since the rigidity of the beam is small, even if the cross section of the column is strengthened, the column base rotates with respect to the foundation, and the horizontal rigidity of the building does not increase. For this reason, it is necessary to add a middle pillar to the wall surface or to add a horizontal brace to the ceiling surface, which causes a restriction on the plan of the building and a high cost.

An object of the present invention is to provide a screw hole of a mounting bracket prior to screwing a bolt inserted into a mounting hole of a mounting bracket fixed to a foundation or the like into a screw hole of a mounting bracket fixed to a column base or the like of a building unit. Is easily aligned with the mounting hole of the mounting hardware to improve the mounting performance of the bolt .

The invention of claim 1 is a guide pin for aligning the screw hole of the mounting bracket with the mounting hole of the mounting bracket prior to screwing the bolt inserted into the mounting hole of the mounting bracket into the screw hole of the mounting bracket. And a collar-shaped guide that is rotatably mounted on the outer periphery of the support shaft and is supported by the support shaft. It is made to have a part .

According to a second aspect of the present invention, in addition to the first aspect of the invention, the outer periphery of the distal end of the collar-shaped guide portion is a tapered portion .

According to a third aspect of the present invention, in the first or second aspect of the present invention, a lubricating oil groove is formed on the inner periphery of the collar-shaped guide portion .

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a tool engaging hole is provided in a tip surface of the support shaft .

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the collar-shaped guide portion is supported by a retaining ring engaged with a distal end side of the support shaft. is there.

The invention of claim 6 is the invention according to any one of claims 1 to 5, wherein the mounting hardware is fixed to the foundation structure, and the mounted bracket is fixed to the column base of the building unit. It is.

1 is a schematic plan view of a unit building, FIG. 2 shows a building unit, (A) is a side view, (B) is a schematic diagram, FIG. 3 is a cross-sectional view showing columns and floor beams of the building unit, and FIG . The basic joint structure of a building unit is shown, (A) is a longitudinal sectional view, (B) is a plan view, FIG. 5 is a plan view showing a horizontal connection structure of adjacent building units, and FIG. FIG . 7 shows a joining structure of cores, (A) is a cross-sectional view in the girder direction, (B) is a cross-sectional view in the direction of wives, FIG. 7 is a longitudinal cross-sectional view showing the basic joint structure of the building unit, and FIG. FIG. 9A is a longitudinal sectional view, FIG. 9B is a plan view, FIG. 9 is a core sectional view, FIG. 9B is a longitudinal sectional view, FIG . plan view illustrating the basic joint of the building unit, Figure 11 is a longitudinal sectional view showing the basic structure for joining the building units, FIG. 12 shows the basic structure, (a) Fig. 13 is a plan view, Fig. 13 is a plan view showing a modification of the foundation joint of the building unit, Fig. 14 shows a foundation structure, (A) is a plan view, and (B) is a longitudinal section. 15 is a plan view showing a modification of the foundation joint of the building unit, FIG. 16 is a plan view showing the foundation structure, FIG. 17 is a plan view showing a modification of the foundation joint of the building unit, and FIG. FIG. 19 is a cross-sectional view showing a guide pin, FIG. 20 is a perspective view showing a process of joining the column base to the foundation, FIG. 21 is a cross-sectional view showing a modification of the guide pin, and FIG. It is a longitudinal cross-sectional view which shows the foundation joining structure of a building unit .

  As shown in FIGS. 1 and 2, the unit building 10 is constructed such that a plurality of factory-produced building units 20 are installed on the foundation 11 so as to be horizontally adjacent to each other on the foundation 11 provided at the construction site. It is built and installed.

  As shown in FIG. 2, the building unit 20 is welded so that a section steel beam 22 is bridged over the column base 21 </ b> A of the four square steel pipe columns 21, and a section steel ceiling beam 23 is attached to the column head of the column 21. It consists of a rectangular parallelepiped frame structure welded so as to span.

  As shown in FIGS. 3 and 4, the building unit 20 welds one end of a U-shaped connecting tool 24 to the outer surface of the column base 21 </ b> A of the column 21. Then, the floor beam 22 is welded and held to the connecting tool 24 with the end portion of the floor beam 22 being held. At this time, the column lid is not provided at the lower end opening of the column base 21 </ b> A of the column 21, and the floor beam 22 is pin-connected to the column base 21 </ b> A of the column 21. However, it is possible to provide a temporary lid 25 used in the manufacturing and transporting stage of the building unit 20 at the lower end opening of the column base 21A. Note that a column lid is provided at the upper end opening of the column head of the column 21, and the ceiling beam 23 is rigidly joined to the column head of the column 21.

In the foundation joint structure of the building unit 20 , as shown in FIGS. 2 and 4, the column base 21 </ b> A of the pillar 21 is rigidly joined to the foundation 11 and fixed. Specifically, a steel foundation structure 13 is fixed to a concrete solid foundation 12 of the foundation 11 using anchor bolts 12A, welded to a substrate 13A of the foundation structure 13, and reinforced with diagonal members 13B. The lower end portion of the steel core 15 is inserted into the steel pipe support portion 14 and welded, and the core 15 is erected upward. In this embodiment, the outer diameter dimension of the cross section of the steel pipe support portion 14 is the same as the outer diameter dimension of the column base 21A. When the building unit 20 is installed on the foundation 11, the core 15 of the foundation 11 is inserted into the hollow portion of the column base 21 </ b> A of the column 21 of the building unit 20, and the upper and lower two that penetrate the column base 21 </ b> A and the core 15 are inserted. The column base 21 </ b> A and the core 15 are joined by the high-strength bolt 31, the washer 32, and the nut 33. The core 15 is in close contact with the inner surface of the column base 21A in the girder direction of the building unit 20 along the axial direction of the high-strength bolt 31 and there is no gap between the inner surface of the column base 21A in the wife direction of the building unit 20. (FIG. 4).

  In addition, in the column 21 of each unit building 20 where there is no column 21 of the building unit 20 adjacent in the girder direction, the column base 21A and the core 15 of the single column 21 are connected to a single high strength. It joins with the volt | bolt 31 (FIG.4 (B)). On the other hand, in the columns 21 of the two sets of building units 20 adjacent to each other in the spar direction, a spacer 34 is sandwiched between the column bases 21A, and the two sets of column bases 21A and 21A and The core 15 is joined (FIG. 5).

  In the above-described basic joint structure of the building unit 20, when the inner surface width of the column base 21A is d and the span of the upper and lower high-strength bolts 31 is e, in the girder direction of the building unit 20, as shown in FIG. D × f1 + e × f2> Ma is established among the vertical force f1, the horizontal force f2, and the bending moment Ma. Further, in the wife direction of the building unit 20, as shown in FIG. 6B, e × f> Mb is established between the horizontal force f and the bending moment Mb. That is, by fastening the core 15 that is in close contact with the inner surface of the column base 21A in the girder direction of the building unit 20 with the two upper and lower high-strength bolts 31, the column base 21A and the core 15 are both in the girder direction and the wife direction. Can be rigidly joined.

  In the above-described foundation joint structure of the building unit 20, the connection tool 24 for the floor beam 22 is welded to the outer side surface of the hollow portion in which the core 15 in the column base 21A of the column 21 is inserted. Construct reinforcement hardware.

According to the above-described foundation joint structure of the building unit 20, the following effects are exhibited.
(a) Since the column base 21A of the building unit 20 is rigidly joined to the foundation 11, the rotation of the column base 21A with respect to the foundation 11 is suppressed, and the horizontal rigidity of the building can be improved. In order to increase the horizontal rigidity of the building, it is not necessary to reinforce the cross section of the column 21, and it is not necessary to add a middle column or a horizontal brace, thereby increasing the degree of freedom of the building plan and reducing the cost.

  (b) The core 15 provided on the foundation 11 is inserted into the hollow portion of the column base 21A, and the column base 21A and the core 15 are brought into close contact with each other by the high-strength bolt 31 penetrating the column base 21A and the core 15. . Thereby, the column base 21A and the core 15 can be rigidly joined in both the girder direction in which the column base 21A and the core 15 are in close contact with each other and the wife direction in which the column base 21A and the core 15 pass through the gap. Therefore, the column base 21 </ b> A can be simply rigidly joined to the foundation 11.

  (c) A reinforcing metal piece 24 was joined to the outer surface of the hollow portion into which the core 15 of the column base 21A was inserted. Thereby, the reinforcement hardware 24 suppresses the rigidity fall of 21 A of column bases, and prevents the local deformation | transformation.

  (d) The connection tool 24 for the floor beam 22 provided on the column base 21A can be used as the reinforcing hardware 24 of the above (c).

  (e) By pinning the floor beam 22 to the column base 21A, the horizontal rigidity of the building can be secured according to (a) described above while simplifying the framework of the building unit 20.

  In addition, by the foundation joint structure mentioned above of the building unit 20, the horizontal rigidity of the building was recognized to be 1.65 times as compared with the conventional example (one in which the column base 21A is pin-joined to the foundation 11).

FIG. 7 shows a basic joint structure for a building unit 20 constituting a piloti (including a garage or the like). The building unit 20 does not have a floor beam 22 on at least one side surface of the frame structure. The bottom end of the steel pipe support 41 is planted on the concrete solid foundation 12 of the foundation 11, and the bottom end of the steel core 15 is inserted and welded to the steel pipe support 41 so that the core 15 is moved upward. Standing toward The steel pipe support 41 does not accompany the side of the building unit 20 that does not have the floor beam 22 like the substrate 13A and the diagonal member 13B of FIG. It is strengthened by providing a locking projection 41A or making the outer diameter dimension of the cross section larger than the outer diameter dimension of the column base 21A. When the building unit 20 is installed on the foundation 11, the core 15 of the foundation 11 is inserted into the hollow portion of the column base 21 </ b> A of the column 21 of the building unit 20, and the upper and lower two that penetrate the column base 21 </ b> A and the core 15 are inserted. The column base 21 </ b> A and the core 15 are joined by the high-strength bolt 31, the washer 32, and the nut 33. The core 15 is in close contact with the inner surface of the column base 21A in the girder direction of the building unit 20 along the axial direction of the high-strength bolt 31 and there is no gap between the inner surface of the column base 21A in the wife direction of the building unit 20. (FIG. 4).

  In the above-described basic joint structure of the building unit 20, the outer surface of the hollow part into which the core 15 of the column base 21 </ b> A is inserted is a short length similar to the connection / reinforcement hardware 24 described above, and the inside of the building unit 20. Reinforcing hardware with a small overhanging dimension can be joined. The lowering of the rigidity of the column base 21A is suppressed to prevent local deformation thereof.

  FIG. 8 shows a modified use example of the core 51 provided on the steel pipe support 14 (or the steel pipe support 41) of the foundation 11 described above. As shown in FIG. 9, the core 51 is formed by welding two steel thick plates 53A and 53B between two steel plate 52A and 52B. , 52B, and a bolt insertion hole is formed between the two thick plates 53A, 53B. The lower end portion of the core 51 is inserted into the steel pipe support portion 14 (or the steel pipe support body 41) of the foundation 11, and two upper and lower high strength bolts 54 penetrating the steel pipe support portion 14 and the core 51, a washer, The steel pipe support 14 and the core 51 are joined together by nuts, and the core 51 is inserted into the hollow portion of the column base 21A of the column 21 of the building unit 20 so as to pass through the column base 21A and the core 51. The column base 21 </ b> A and the core 51 are joined by the high-strength bolt 55, washer, and nut. The core 51 is in close contact with the inner surface of the steel pipe support portion 14 and the column base 21A in the girder direction of the building unit 20 along the axial direction of the high-strength bolts 54 and 55, and is supported in the wife direction of the building unit 20 with steel pipe. A gap is interposed between the portion 14 and the inner surface of the column base 21A (FIG. 8).

10, FIG. 11 shows the basic joint of the building unit 20, rigidly joined to the foundation 60 of the pedestal 21A of one of the pillars 21 of the building unit 20 is located in the outer peripheral corner portion of the unit building 10 To fix.

  As shown in FIG. 11, the foundation 60 fixes the steel foundation structure 63 using anchor bolts 62 fixed to the embedded plate 61 </ b> A of the concrete solid foundation 61. As shown in FIG. 12, the foundation structure 63 is formed by fixing bolt fixing plates 63 </ b> B provided at three positions on the L-shaped bottom portion of the L-shaped body portion 63 </ b> A in plan view on the solid foundation 61. Solidified by 62. In the base structure 63, a plurality of (for example, four) sleeve-shaped steel mounting brackets 64 are fixed to the upper portion of the main body 63A by welding, and a mounting hole 64A is provided in each mounting bracket 64. On the other hand, each of a plurality of locations (for example, four locations) in the hollow lower end portion of the column base 21A of the column 21 of the building unit 20 is fixed by welding with a mounting bracket 65, and each mounting bracket 65 is provided with a screw hole 65A. It is done. Therefore, when the building unit 20 is installed on the foundation 60, the screw hole 65A of the mounting bracket 65 of the column base 21A is aligned with the attachment hole 64A of the attachment metal 64 of the foundation 60, and the attachment hole 64A of the attachment metal 64 is aligned. By screwing the inserted high-strength bolt 66 into the screw hole 65 </ b> A of the attachment fitting 65, the column base 21 </ b> A is rigidly joined to the attachment hardware 64 of the foundation 60.

  FIG. 13 shows a modification of the foundation joint portion of the building unit 20, in which the column bases 21 </ b> A of the two pillars 21 of the two building units 20 adjacent to each other in the unit building 10 are rigidly joined to the foundation 60. To fix. The foundation 60 in FIG. 13 differs from the foundation 60 in FIG. 10 in that the base structure 63 has a T-shaped intersection at the bottom of the T-shaped body portion 63A that is T-shaped in plan view as shown in FIG. The bolt fixing plate 63B provided at each of the four positions including is fixed on the solid foundation 61 by the anchor bolt 62.

  FIG. 15 shows a modification of the foundation joint portion of the building unit 20, in which the column bases 21 </ b> A of the three columns 21 of the three building units 20 adjacent to each other in the unit building 10 are rigidly joined to the foundation 60. To fix. 15 differs from the foundation 60 in FIG. 10 as a base structure 63, as shown in FIG. 16, at the intersection of the deformed cross at the bottom of the deformed cross-shaped body 63A having a deformed cross shape in plan view. The bolt fixing plate 63B provided at each of the five positions including is fixed on the solid foundation 61 by the anchor bolt 62.

  FIG. 17 shows a modification of the foundation joint portion of the building unit 20, and the column bases 21 </ b> A of the four columns 21 of the four building units 20 adjacent to each other in the unit building 10 are rigidly joined to the foundation 60. To fix. The base 60 in FIG. 17 differs from the base 60 in FIG. 10 in that the base structure 63 includes a crossed portion at the cross-shaped bottom portion of the main body 63A having a cross shape in plan view as shown in FIG. The bolt fixing plate 63B provided at each position is fixed on the solid foundation 61 by the anchor bolt 62.

  Here, the guide pin 70 is used as a means for aligning the screw hole 65A of the mounting bracket 65 of the column base 21A with the mounting hole 64A of the mounting hardware 64 of the foundation 60. As shown in FIG. 19, the guide pin 70 includes a male screw portion 71 screwed into a screw hole 65A of the mounting bracket 65 of the column base 21A, and a support shaft continuous to the male screw portion via an incomplete screw portion 72. 73 and a collar-shaped guide portion 74 loaded on the outer periphery of the support shaft 73. The guide pin 70 supports the collar-shaped guide portion 74 between the large-diameter retaining portion 75 formed by forging at the tip of the support shaft 73 and the incomplete screw portion 72 to prevent the collar-shaped guide portion 74 from coming off. The maximum outer diameter of the collar-shaped guide portion 74 is slightly larger than the outer diameter of the external thread portion 71 and the incomplete thread portion 72, and the outer periphery of the collar-shaped guide portion 74 to the outer periphery of the distal end of the support shaft 73 are continuously tapered. The taper part 76 to be formed is formed to improve the insertability into the mounting hole 64A. A lubricating oil groove 74A is formed on the inner periphery of the collar-shaped guide portion 74, and a clearance is formed between the inner periphery of the collar-shaped guide portion 74 and the outer periphery of the support shaft 73. Smooth rotation with respect to the support shaft 73 is achieved. A tool engagement hole 73A such as a hexagonal hole is provided at the distal end surface of the support shaft 73, and the male thread portion 71 is screwed into the screw hole 65A of the mounting bracket 65 by a rotation operation applied to the tool engaged with the tool engagement hole 73A. Make it detachable.

Therefore, the joining procedure of the column base 21A to the foundation 60 is performed as follows.
(1) Immediately before the installation of the building unit 20 to the foundation 60, as shown in FIG. 20, the threaded portion 71 of the guide pin 70 is pillared using a tool engaged with the tool engagement hole 73A of the guide pin 70. 21 is screwed into the screw hole 65A of the mounting bracket 65 provided on the column base 21A.

  (2) Insert the collar-shaped guide portion 74 of the guide pin 70 screwed into the screw hole 65A of the column base 21A into the mounting hole 64A of the mounting hardware 64 of the foundation 60 as shown in FIG. Align with the hole 64A.

  (3) Using the tool engaged with the tool engaging hole 73A of the guide pin 70, the guide pin 70 screwed into the screw hole 65A of the column base 21A is removed from the screw hole 65A and the mounting hole 64A. The high-strength bolt 66 inserted into the mounting hole 64A after removal is temporarily fixed to the screw hole 65A of the column base 21A.

  (4) The high strength bolts 66 inserted through all the mounting holes 64A of the mounting hardware 64 of the foundation 60 are finally tightened into the screw holes 65A of the column base 21A.

  A guide pin 70A shown in FIG. 21 is a modification of the guide pin 70 shown in FIG. 19, and has a straight outer periphery that is substantially continuous throughout the entire axial direction of the support shaft 73 by removing the large-diameter retaining portion 75 of the guide pin 70. An annular groove 75A was provided on the distal end side, and a retaining ring 75B was engaged with the annular groove 75A. The guide pin 70A supports the collar-shaped guide portion 74 between the retaining ring 75B provided on the support shaft 73 and the incomplete screw portion 72.

  According to the above-described foundation joint structure of the building unit 20, the screw hole 65 </ b> A of the attachment fitting 65 provided on the column base 21 </ b> A is aligned with the attachment hole 64 </ b> A of the attachment hardware 64 provided on the foundation 60, and the high strength bolt 66. Thus, the metal fitting 65 to be attached was joined to the metal fitting 64. Therefore, the column base 21 </ b> A can be easily rigidly joined to the foundation 60.

  Further, by using the guide pin 70, the displacement of the mounting hole 64A of the mounting hardware 64 provided on the foundation 60 and the screw hole 65A of the mounting bracket 65 provided on the column base 21A is corrected, and the mounting bracket 65 of the mounting bracket 65 is fixed. The screw hole 65A can be easily aligned with the attachment hole 64A of the attachment hardware 64, and the high-strength bolt 66 can be easily inserted into the attachment hole 64A and screwed into the screw hole 65A.

FIG. 22 shows a basic joint structure for a building unit 20 constituting a piloti (including a garage or the like). The building unit 20 does not have a floor beam 22 on at least one side surface of the frame structure. The steel foundation structure 80 is fixed to the anchor bolt 62 fixed to the embedding plate 61 </ b> A of the solid foundation 61 in the foundation 60. In the foundation structure 80, a plate-shaped steel mounting fixture 82 is fixed to the upper portion of the main body 81 fixed to the anchor bolt 62 on the solid foundation 61 by welding, and a plurality (for example, four) of the mounting fixture 82 is provided. A mounting hole 82A is provided. On the other hand, to- be-attached metal fittings 65 are fixed to each of a plurality of locations (for example, four places) in the hollow lower end portion of the column base 21A of the pillar 21 of the building unit 20 by welding, and screw holes 65A are provided in each of the to-be-attached metal fittings 65. Provided. Therefore, when the building unit 20 is installed on the foundation 60, the screw holes 65A of the mounting bracket 65 of the column base 21A are aligned with the mounting holes 82A of the mounting hardware 82 of the foundation 60 by using the guide pins 70 , etc. The high-strength bolt 66 inserted through the mounting hole 82A of the mounting hardware 82 is screwed into the screw hole 65A of the mounting bracket 65, whereby the column base 21A is rigidly joined to the mounting hardware 82 of the foundation 60.

  The foundation structure 80 is not limited to the anchor bolt 62 fixed to the embedded plate 61A of the solid foundation 61 in the foundation 60, but the main body 81 is implanted in the solid foundation 61, It is good also as what equips the planting part to the solid foundation 61 of 81 with the latching protrusion similar to 41 A of latching protrusions provided in the support body 41 in Example 2. FIG.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention. For example, in implementation of this invention, the floor beam of a building unit may be rigidly joined to a column base. The building unit is not limited to a frame structure, and may be a wall structure. Further, the floor frame and ceiling frame of the building unit are not limited to those having a quadrilateral shape.

FIG. 1 is a schematic plan view of a unit building. FIG. 2 shows a building unit, (A) is a side view, and (B) is a schematic diagram. FIG. 3 is a cross-sectional view showing the pillars and floor beams of the building unit. 4A and 4B show a basic joint structure of a building unit , where FIG. 4A is a longitudinal sectional view and FIG. 4B is a plan view. FIG. 5 is a plan view showing a horizontal connection structure of adjacent building units. 6A and 6B show the joining structure of the column base and the core of the building unit, where FIG. 6A is a cross-sectional view in the girder direction and FIG. 6B is a cross-sectional view in the end direction. FIG. 7 is a longitudinal cross-sectional view showing the basic joint structure of the building unit . FIGS. 8A and 8B show the joint structure between the column base and the core of the building unit, where FIG. 8A is a longitudinal sectional view and FIG. 8B is a plan view. FIG. 9 shows a core, (A) is a longitudinal sectional view, and (B) is a plan view. FIG. 10 is a plan view showing the foundation joint of the building unit . FIG. 11 is a vertical cross-sectional view showing a basic joint structure of a building unit . 12A and 12B show a basic structure, where FIG. 12A is a plan view and FIG. 12B is a vertical view. FIG. 13 is a plan view showing a modification of the foundation joint of the building unit. FIG. 14 shows a basic structure, (A) is a plan view, and (B) is a longitudinal sectional view. FIG. 15 is a plan view showing a modification of the foundation joint of the building unit. FIG. 16 is a plan view showing the foundation structure. FIG. 17 is a plan view showing a modification of the foundation joint of the building unit. FIG. 18 is a plan view showing the foundation structure. FIG. 19 is a cross-sectional view showing a guide pin. FIG. 20 is a perspective view showing a process of joining the column base to the foundation. FIG. 21 is a cross-sectional view showing a modification of the guide pin. FIG. 22 is a vertical cross-sectional view showing the basic joint structure of the building unit .

Explanation of symbols

10 Unit Building 11 Foundation 20 Building Unit 21 Column 21A Column Base 31 High Strength Bolt 60 Foundation
64 Mounting hardware 64A, 82A Mounting hole (mounting part)
65 Mounted bracket 65A Screw hole (Mounted part)
66 High strength bolt 70 , 70A guide pin
71 Male thread
73 Spindle
73A Tool engagement hole
74 Color guide
74A Oil groove for lubrication
75 Retaining part
75A annular groove
75B retaining ring
76 Tapered part

Claims (6)

A guide pin for aligning the screw hole of the mounting bracket with the mounting hole of the mounting bracket prior to screwing the bolt inserted into the mounting hole of the mounting bracket into the screw hole of the mounting bracket,
A male thread portion to be screwed into a screw hole of the mounting bracket;
A spindle continuous to the male thread,
A guide pin having a collar-shaped guide portion that is rotatably mounted on the outer periphery of the support shaft and is supported by the support shaft so as not to come off. The guide pin according to claim 1, wherein an outer periphery of a distal end of the collar-shaped guide portion is a tapered portion. The guide pin according to claim 1, wherein a lubricating oil groove is formed on an inner periphery of the collar-shaped guide portion. The guide pin according to any one of claims 1 to 3, wherein a tool engagement hole is provided in a tip surface of the support shaft. The guide pin according to any one of claims 1 to 4, wherein the collar-shaped guide portion is supported by a retaining ring engaged with a distal end side of the support shaft. The guide pin according to any one of claims 1 to 5, wherein the mounting hardware is fixed to a foundation structure, and the mounted bracket is fixed to a column base of a building unit.

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