Building reform method and building

Abstract

To provide a building reform method which can adjust the vertical position of an outer wall material, and a building.SOLUTION: A building reform method has: a removal step of removing a target outer wall material and a target framework; a foundation fitting step of arranging a foundation 16 to a part at which the target framework in a base 11 has been arranged, and fixing the foundation 16 to an anchor-bolt to which the target framework has been fixed; a framework fitting step of arranging a new framework having a new vertical frame part and a new horizontal frame part at a space between the foundation 16 and a beam, and fixing the new framework to the foundation 16; and an outer wall material fitting step of fitting the new outer wall material. The foundation 16 is provided with a support unit 17 having a support part 71 and an adjustment part 72 for adjusting the vertical position of the support part 71. The support part 71 is fitted to the foundation 16 so as to locate at the outdoor side of the foundation 16. In the outer wall material fitting step, the new outer wall material is placed on the support part 71.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a method for renovating a building and a building. [Background technology]

[0002] Patent Document 1 discloses a method for replacing a frame of a building that includes a frame having a foundation, beams, vertical frame portions and horizontal frame portions arranged between the foundation and the beams, and exterior wall materials installed on the exterior side of the frame. After the exterior wall materials installed on the exterior side of the frame to be replaced and the frame to be replaced are removed from the building, a new frame is installed. Furthermore, the new exterior wall materials are installed so that they are located on the exterior side of the new frame. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-357004 Summary of the Invention [Problem to be solved by the invention]

[0004] If the vertical position of a new exterior wall material differs from the vertical position of the exterior wall material adjacent to it, a misalignment will occur at the top and bottom ends of the two adjacent exterior wall materials, which will impair the appearance of the building. [Means for solving the problem]

[0005] (1) A method for renovating a building that solves the above-mentioned problems is a method for renovating a building that has a foundation, beams, a frame having vertical frame parts and horizontal frame parts arranged between the foundation and the beams, and exterior wall materials that are installed outside the frame and are fixed to anchor bolts protruding from the foundation, the method comprising the steps of: removing the target exterior wall material that is the exterior wall material to be replaced and the target frame and frame that is the frame to be replaced; placing a base in the part of the foundation where the target frame and frame were arranged; and removing the abutment where the target frame and frame were fixed. The method includes a foundation installation process for fixing the foundation to anchor bolts, a frame installation process for placing a new frame having new vertical frame sections and new horizontal frame sections between the foundation and the beams and fixing the new frame to the foundation, and an exterior wall material installation process for installing new exterior wall materials, wherein the foundation is provided with a support unit having a support section and an adjustment section for adjusting the vertical position of the support section, and the support section is installed on the foundation so as to be located closer to the exterior than the foundation, and in the exterior wall material installation process, the new exterior wall material is placed on the support section. According to this method, the vertical position of the new exterior building material supported by the support portion can be adjusted by adjusting the vertical position of the support portion using the adjustment portion.

[0006] (2) In the building renovation method of (1) above, the foundation has a first flange fixed to the anchor bolt, a second flange located above the first flange and to which the new frame is fixed, and a web connecting the first flange and the second flange, the adjustment part has an adjustment bolt having a shaft and a head, and an adjustment nut that engages with the adjustment bolt, the shaft passes through the second flange in the vertical direction, the end of the shaft opposite the head is positioned on the first flange, and the support part is fixed to the adjustment nut.

[0007] With this configuration, when the adjustment bolt is rotated, the position of the adjustment nut relative to the adjustment bolt changes in the axial direction of the shaft. This also changes the vertical position of the support part fixed to the adjustment nut. Therefore, by rotating the adjustment bolt, the worker can adjust the vertical position of the new siding material.

[0008] The head of the adjustment bolt is located above the first flange, making it easy for workers to rotate the adjustment bolt even when the new siding is supported by the support, i.e., when the space enclosed by the first flange, second flange, and web is covered by the new siding.

[0009] (3) In the building renovation method described in (2) above, the support portion has an upper portion to which the adjustment nut is fixed, a lower portion located outside the base and lower than the upper portion in the vertical direction and on which the new exterior wall material is placed, and a step portion connecting the upper portion and the lower portion.

[0010] For example, if the support section is flat, even if the support section is lowered to a position where its bottom surface contacts the first flange, the top surface of the support section will be positioned above the first flange. As a result, the new exterior wall material supported by the support section will also be positioned above the first flange. Therefore, the new exterior wall material cannot cover the entire foundation.

[0011] In contrast, if the support portion has an upper portion, a lower portion, and a step portion, the lower portion can be positioned lower than the first flange. This allows the new exterior wall material supported by the support portion to be positioned lower than the first flange. This allows the new exterior wall material to cover the entire foundation, improving the appearance of the building.

[0012] (4) In any one of the building renovation methods (1) to (3) above, the foundation has a first end plate located at a first end in the direction in which the foundation extends and a second end plate located at a second end in the direction in which the foundation extends, and in the foundation installation process, the first end plate constitutes the existing frame, which is the frame that was not removed in the removal process, and is fixed to the vertical frame portion adjacent to the first end plate, and the second end plate constitutes the existing frame and is fixed to the vertical frame portion adjacent to the second end plate. With this method, the foundation is fixed not only to the anchor bolts but also to the existing frame, making it possible to fix the foundation more firmly.

[0013] (5) In the method for renovating a building according to any one of (1) to (4) above, the base has a first flange fixed to the anchor bolt, a second flange located above the first flange and to which the new frame is fixed, a web connecting the first flange and the second flange, and a stiffener connecting the first flange, the second flange, and the web, and the stiffener is provided at a position corresponding to the new vertical frame portion of the new frame in the direction in which the base extends.

[0014] According to this method, the part of the foundation where the new vertical frame part is attached, which is the part that is likely to be subjected to load, is reinforced with stiffeners, so deformation of the foundation can be suppressed.

[0015] Furthermore, by installing the new vertical frame in the part of the foundation that is reinforced with stiffeners, the load applied to the new vertical frame is transmitted to the foundation via the stiffeners and the first flange. Therefore, compared to when stiffeners are not installed near the new vertical frame in the foundation, the load applied from the framework to other members can be reduced, making the building more stable.

[0016] (6) In the building renovation method of (5) above, the stiffener is provided in a portion different from the portion fixed to the anchor bolt in the direction in which the foundation extends. According to this method, the stiffener does not interfere with the anchor bolt, improving workability when fixing the base to the anchor bolt in the base installation process.

[0017] (7) In the building renovation method of (5) or (6) above, in the frame installation process, the two new vertical frame sections are installed so as to be adjacent to each other in the direction in which the base extends, and the base has a first stiffener as the stiffener provided at a position corresponding to one of the two adjacent new vertical frame sections, a second stiffener as the stiffener provided at a position corresponding to the other of the two adjacent new vertical frame sections, and a third stiffener as the stiffener provided between the first stiffener and the second stiffener.

[0018] With this configuration, the portions of the base where the two new vertical frame portions are attached, which are particularly susceptible to load, are reinforced by the first to third stiffeners, thereby further suppressing deformation of the base.

[0019] (8) In the method for renovating a building of any one of (1) to (7) above, in the frame installation process, the new frame, which is an open frame having an opening, is installed, and the new vertical frame portion of the open frame is fixed to a part of the base other than both ends.

[0020] For example, when fixing an open frame to the anchor bolts that previously fixed the target frame, the new vertical frame must be positioned on the anchor bolts, which limits the position of the open frame in the direction the beam extends. In other words, it is not possible to create an opening at any position in the direction the beam extends. In order to create an opening at any position in the direction the beam extends, new anchor bolts must be installed to fix the open frame.

[0021] In contrast, when the base is fixed to the anchor bolts to which the target frame was fixed and an opening frame is fixed to the base, the new vertical frame can be fixed to the base even if the new vertical frame is not positioned on the anchor bolts. Therefore, the opening frame can be positioned at any position in the direction of the base extension without the need to install new anchor bolts to fix the new frame. In the above method, during the frame installation process, the new vertical frame of the opening frame is fixed to a part of the base other than both ends. Therefore, an opening can be created in the center of the base extension direction.

[0022] (9) A building that solves the above problem is a building comprising a foundation, beams, a frame having vertical and horizontal frame sections arranged between the foundation and the beams, and an exterior wall material arranged outdoors relative to the frame, and further comprising a base arranged between the foundation and the beams and fixed to anchor bolts protruding from the foundation, the frame being arranged between the base and the beams and fixed to the base, and the base being provided with a support unit having a support section that supports the exterior wall material and an adjustment section that adjusts the vertical position of the support section.

[0023] According to this configuration, the vertical position of the new exterior building material supported by the support portion can be adjusted by adjusting the vertical position of the support portion using the adjustment portion. [Effects of the Invention]

[0024] According to the building renovation method and building of the present invention, the vertical position of the exterior wall material can be adjusted. [Brief explanation of the drawings]

[0025] [Figure 1] This is a side view showing the building before renovation. [Figure 2] This is a side view showing the building after renovation. [Figure 3] FIG. [Figure 4]This is a cross-sectional view of the building after renovation along line 4-4 in Figure 2. [Figure 5] This is an oblique view of the area around the foundation of a building after renovation. [Figure 6] This is a cross-sectional view of the area around the foundation of a building after renovation. [Figure 7] This is a side view of the area near the foundation of the building after the removal process. [Figure 8] FIG. 10 is a cross-sectional view showing the frame installation process. DETAILED DESCRIPTION OF THE INVENTION

[0026] A method for renovating a building 10 and the building 10 of this embodiment will be described with reference to Figures 1 to 8. Note that Figure 1 shows the building 10 before being renovated by the method for renovating a building 10 of this embodiment. Figure 2 shows the building 10 after being renovated by the method for renovating a building 10 of this embodiment.

[0027] <Building before renovation> As shown in Fig. 1, a building 10 before renovation includes a foundation 11, a plurality of anchor bolts 12, beams 13, a plurality of frameworks 14, and a plurality of exterior wall materials 15. In this embodiment, the building 10 before renovation includes first to sixth anchor bolts 12a to 12f as the plurality of anchor bolts 12. The building 10 before renovation includes first to fourth frameworks 41 to 44 as the plurality of frameworks 14. The building 10 before renovation includes first to fourth exterior wall materials 51 to 54 as the plurality of exterior wall materials 15.

[0028] The foundation 11 is made of reinforced concrete. The first to sixth anchor bolts 12a to 12f are embedded in the foundation 11. The tips of the first to sixth anchor bolts 12a to 12f protrude from the upper surface of the foundation 11. The beam 13 in this embodiment is made of H-shaped steel (see FIG. 4).

[0029] The first to fourth frame members 41 to 44 are arranged between the foundation 11 and the beams 13 in the vertical direction. The third frame member 43 and the fourth frame member 44 are located between the first frame member 41 and the second frame member 42 in the direction in which the beams 13 extend. The third frame member 43 is located closer to the first frame member 41 than the fourth frame member 44 in the direction in which the beams 13 extend.

[0030] The first frame 41 has a first lower horizontal frame portion 41a, a first upper horizontal frame portion 41b, a first vertical frame portion 41c, and a first auxiliary frame portion 41d. The first lower horizontal frame portion 41a, the first upper horizontal frame portion 41b, and the first auxiliary frame portion 41d are each horizontal frame portions that extend in the extension direction of the beams 13. The first vertical frame portion 41c is a vertical frame portion that extends in the up-down direction.

[0031] The first lower horizontal frame portion 41a is disposed along the upper surface of the foundation 11. The first upper horizontal frame portion 41b is disposed along the lower surface of the beam 13. The first auxiliary frame portion 41d is located between the first lower horizontal frame portion 41a and the first upper horizontal frame portion 41b in the vertical direction.

[0032] The tip of the first anchor bolt 12a penetrates the lower end of the first vertical frame portion 41c. A nut (not shown) is engaged with the tip of the first anchor bolt 12a, thereby fixing the lower end of the first vertical frame portion 41c to the first anchor bolt 12a. Therefore, the first frame 41 is fixed to the anchor bolt 12a. Furthermore, the upper end of the first vertical frame portion 41c is fixed to the beam 13 by a bolt (not shown). Therefore, the first frame 41 is fixed to the beam 13.

[0033] The second frame 42 has a second lower horizontal frame portion 42a, a second upper horizontal frame portion 42b, a second vertical frame portion 42c, and a second auxiliary frame portion 42d. The second lower horizontal frame portion 42a, the second upper horizontal frame portion 42b, and the second auxiliary frame portion 42d are each horizontal frame portions that extend in the direction of extension of the beams 13. The second vertical frame portion 42c is a vertical frame portion that extends in the up-down direction.

[0034] The second lower horizontal frame portion 42a is disposed along the upper surface of the foundation 11. The second upper horizontal frame portion 42b is disposed along the lower surface of the beam 13. The second auxiliary frame portion 42d is located between the second lower horizontal frame portion 42a and the second upper horizontal frame portion 42b in the vertical direction.

[0035] The tip of the second anchor bolt 12b penetrates the lower end of the second vertical frame portion 42c. A nut (not shown) is engaged with the tip of the second anchor bolt 12b, thereby fixing the lower end of the second vertical frame portion 42c to the second anchor bolt 12b. Therefore, the second frame 42 is fixed to the anchor bolt 12. Furthermore, the upper end of the second vertical frame portion 42c is fixed to the beam 13 by a bolt (not shown). Therefore, the second frame 42 is fixed to the beam 13.

[0036] The third frame 43 has a third lower horizontal frame portion 43a, a third upper horizontal frame portion 43b, and a pair of third vertical frame portions 43c, 43d. The third lower horizontal frame portion 43a and the third upper horizontal frame portion 43b are each horizontal frame portions extending in the extension direction of the beam 13. The pair of third vertical frame portions 43c, 43d are each vertical frame portions extending in the up-down direction.

[0037] The third lower horizontal frame portion 43a is disposed along the upper surface of the foundation 11. The third upper horizontal frame portion 43b is disposed along the lower surface of the beam 13. The pair of third vertical frame portions 43c, 43d are arranged at an interval in the extension direction of the beam 13. One third vertical frame portion 43c is adjacent to the first vertical frame portion 41c of the first frame 41. The other third vertical frame portion 43d is adjacent to the fourth frame 44.

[0038] The tip of the third anchor bolt 12c penetrates the lower end of one of the third vertical frame portions 43c. A nut (not shown) is engaged with the tip of the third anchor bolt 12c, thereby fixing the lower end of one of the third vertical frame portions 43c to the third anchor bolt 12c. The tip of the fourth anchor bolt 12d penetrates the lower end of the other of the third vertical frame portions 43d. A nut (not shown) is engaged with the tip of the fourth anchor bolt 12d, thereby fixing the lower end of the other of the third vertical frame portions 43d to the fourth anchor bolt 12d. Therefore, the third frame 43 is fixed to the anchor bolts 12.

[0039] Additionally, the upper ends of the pair of third vertical frame portions 43c, 43d are each fixed to the beam 13 by bolts (not shown). Thus, the third frame 43 is fixed to the beam 13. One of the third vertical frame portions 43c is fixed to the first vertical frame portion 41c by bolts (not shown). Thus, the third frame 43 is fixed to the first frame 41.

[0040] The third frame 43 has a third auxiliary lower horizontal frame portion 43e and a third auxiliary upper horizontal frame portion 43f. The third auxiliary lower horizontal frame portion 43e and the third auxiliary upper horizontal frame portion 43f are horizontal frame portions that extend in the direction in which the beams 13 extend.

[0041] The third auxiliary lower horizontal frame portion 43e and the third auxiliary upper horizontal frame portion 43f are arranged between the third lower horizontal frame portion 43a and the third upper horizontal frame portion 43b in the up-down direction. The third auxiliary upper horizontal frame portion 43f is located closer to the third upper horizontal frame portion 43b than the third auxiliary lower horizontal frame portion 43e in the up-down direction. The third auxiliary lower horizontal frame portion 43e and the third auxiliary upper horizontal frame portion 43f are arranged between the pair of third vertical frame portions 43c, 43d in the extension direction of the beam 13. The third auxiliary lower horizontal frame portion 43e and the third auxiliary upper horizontal frame portion 43f each connect the pair of third vertical frame portions 43c, 43d.

[0042] The third frame 43 has two third auxiliary lower vertical frame portions 43g and two third auxiliary upper vertical frame portions 43h. The two third auxiliary lower vertical frame portions 43g and the two third auxiliary upper vertical frame portions 43h are vertical frame portions that extend in the up-down direction.

[0043] The two third auxiliary lower vertical frame portions 43g are arranged between the third auxiliary lower horizontal frame portion 43e and the third lower horizontal frame portion 43a in the up-down direction. Each of the two third auxiliary lower vertical frame portions 43g connects the third auxiliary lower horizontal frame portion 43e and the third lower horizontal frame portion 43a. The two third auxiliary lower vertical frame portions 43g are arranged between the pair of third vertical frame portions 43c, 43d in the direction in which the beam 13 extends. The two third auxiliary lower vertical frame portions 43g are adjacent to each other in the direction in which the beam 13 extends.

[0044] The two third auxiliary upper vertical frame portions 43h are arranged between the third upper horizontal frame portion 43b and the third auxiliary upper horizontal frame portion 43f in the up-down direction. Each of the two third auxiliary upper vertical frame portions 43h connects the third upper horizontal frame portion 43b and the third auxiliary upper horizontal frame portion 43f. The two third auxiliary upper vertical frame portions 43h are arranged between the pair of third vertical frame portions 43c, 43d in the direction in which the beam 13 extends. The two third auxiliary upper vertical frame portions 43h are adjacent to each other in the direction in which the beam 13 extends.

[0045] In the third frame 43, an opening 430 is defined by a pair of third vertical frame portions 43c, 43d, a third auxiliary lower horizontal frame portion 43e, and a third auxiliary upper horizontal frame portion 43f. Therefore, the third frame 43 is an open frame having the opening 430. For example, a window sash (not shown) is fitted into the opening 430.

[0046] The fourth frame 44 has a fourth lower horizontal frame portion 44a, a fourth upper horizontal frame portion 44b, and a pair of fourth vertical frame portions 44c, 44d. The fourth lower horizontal frame portion 44a and the fourth upper horizontal frame portion 44b are each horizontal frame portions extending in the extension direction of the beam 13. The pair of fourth vertical frame portions 44c, 44d are each vertical frame portions extending in the up-down direction.

[0047] The fourth lower horizontal frame portion 44a is disposed along the upper surface of the foundation 11. The fourth upper horizontal frame portion 44b is disposed along the lower surface of the beam 13. The pair of fourth vertical frame portions 44c, 44d are arranged at an interval in the extension direction of the beam 13. One fourth vertical frame portion 44c is adjacent to the other third vertical frame portion 43d of the third frame 43. The other fourth vertical frame portion 44d is adjacent to the second vertical frame portion 42c of the second frame 42.

[0048] The tip of the fifth anchor bolt 12e penetrates the lower end of one of the fourth vertical frame portions 44c. A nut (not shown) is engaged with the tip of the fifth anchor bolt 12e, thereby fixing the lower end of one of the fourth vertical frame portions 44c to the fifth anchor bolt 12e. The tip of the sixth anchor bolt 12f penetrates the lower end of the other of the fourth vertical frame portions 44d. A nut (not shown) is engaged with the tip of the sixth anchor bolt 12f, thereby fixing the lower end of the other of the fourth vertical frame portions 44d to the sixth anchor bolt 12f. Therefore, the fourth frame 44 is fixed to the anchor bolts 12.

[0049] Furthermore, the upper ends of the pair of fourth vertical frame portions 44c, 44d are each fixed to the beam 13 by bolts (not shown). Thus, the fourth frame 44 is fixed to the beam 13. One fourth vertical frame portion 44c is fixed to the other third vertical frame portion 43d by bolts (not shown). Thus, the fourth frame 44 is fixed to the third frame 43. The other fourth vertical frame portion 44d is fixed to the second vertical frame portion 42c by bolts (not shown). Thus, the fourth frame 44 is fixed to the second frame 42.

[0050] The fourth frame 44 has two fourth auxiliary vertical frame portions 44e. Each of the two fourth auxiliary vertical frame portions 44e is a vertical frame portion extending in the up-down direction. The two fourth auxiliary vertical frame portions 44e are arranged between the fourth lower horizontal frame portion 44a and the fourth upper horizontal frame portion 44b in the up-down direction. The two fourth auxiliary vertical frame portions 44e connect the fourth lower horizontal frame portion 44a and the fourth upper horizontal frame portion 44b. The two fourth auxiliary vertical frame portions 44e are arranged between the pair of fourth vertical frame portions 44c, 44d in the direction in which the beam 13 extends. The two fourth auxiliary vertical frame portions 44e are adjacent to each other in the direction in which the beam 13 extends.

[0051] The fourth frame 44 has two fourth auxiliary horizontal frame portions 44f. Each of the two fourth auxiliary horizontal frame portions 44f is a horizontal frame portion extending in the direction in which the beam 13 extends. The two fourth auxiliary horizontal frame portions 44f are arranged between the fourth lower horizontal frame portion 44a and the fourth upper horizontal frame portion 44b in the up-down direction. One of the fourth auxiliary horizontal frame portions 44f is arranged between one of the fourth vertical frame portions 44c and one of the fourth auxiliary vertical frame portions 44e in the direction in which the beam 13 extends. One of the fourth auxiliary horizontal frame portions 44f connects one of the fourth vertical frame portions 44c and one of the fourth auxiliary vertical frame portions 44e. The other fourth auxiliary horizontal frame portion 44f is arranged between the other fourth vertical frame portion 44d and the other fourth auxiliary vertical frame portion 44e in the direction in which the beam 13 extends. The other fourth auxiliary horizontal frame portion 44f connects the other fourth vertical frame portion 44d and the other fourth auxiliary vertical frame portion 44e.

[0052] The first exterior wall material 51 is provided on the outdoor side of the first framework 41. The first exterior wall material 51 is supported by a first support piece (not shown) provided on the lower surface of the first lower horizontal frame portion 41a of the first framework 41.

[0053] The second exterior wall material 52 is provided on the outdoor side of the second frame 42. The second exterior wall material 52 is supported by a second support piece (not shown) provided on the lower surface of the second lower horizontal frame portion 42a of the second frame 42.

[0054] The third exterior wall material 53 is provided on the outdoor side of the third framework 43. The third exterior wall material 53 is supported by a third support piece (not shown) provided on the underside of the third lower horizontal frame portion 43a of the third framework 43. A through hole 53a is provided in the portion of the third exterior wall material 53 facing the opening 430.

[0055] The fourth exterior wall material 54 is provided on the outdoor side of the fourth frame 44. The fourth exterior wall material 54 is supported by a fourth support piece (not shown) provided on the underside of the fourth lower horizontal frame portion 44a of the fourth frame 44.

[0056] <Building after renovation> As shown in Fig. 2, the remodeled building 10 includes a foundation 11, a plurality of anchor bolts 12, beams 13, a plurality of frameworks 14, a plurality of exterior wall materials 15, and a base 16. The remodeled building 10 of this embodiment includes first to sixth anchor bolts 12a to 12f as the plurality of anchor bolts 12. The remodeled building 10 includes a first framework 41, a second framework 42, a fifth framework 45, a sixth framework 46, and a seventh framework 47 as the plurality of frameworks 14. The remodeled building 10 includes a first framework 51, a second framework 52, a fifth framework 55, a sixth framework 56, and a seventh framework 57 as the plurality of exterior wall materials 15.

[0057] The foundation 11, the first to sixth anchor bolts 12a to 12f, the beams 13, the first frame 41, the second frame 42, the first exterior wall material 51, and the second exterior wall material 52 are parts that will not be replaced by the renovation. Therefore, the first frame 41 and the second frame 42 are existing frames. The foundation 11, the first to sixth anchor bolts 12a to 12f, the beams 13, the first frame 41, the second frame 42, the first exterior wall material 51, and the second exterior wall material 52 have the same configuration as the building 10 before the renovation, so their explanation will be omitted.

[0058] On the other hand, the third frame 43, the fourth frame 44, the third exterior wall material 53, and the fourth exterior wall material 54 have been replaced with the foundation 16, the fifth to seventh frame materials 45-47, and the fifth to seventh exterior wall materials 55-57 through renovation. Therefore, the third frame 43 and the fourth frame 44 are target frame materials, which are frame materials to be replaced in the renovation. The third exterior wall material 53 and the fourth exterior wall material 54 are target exterior wall materials, which are exterior wall materials to be replaced in the renovation. The fifth to seventh frame materials 45-47 are new frame materials newly installed through renovation. The fifth to seventh exterior wall materials 55-57 are new exterior wall materials newly installed through renovation.

[0059] The base 16 is disposed between the foundation 11 and the beams 13 in the vertical direction. The base 16 extends parallel to the beams 13. The base 16 is disposed in a portion of the foundation 11 where the symmetrical frame was disposed. In this embodiment, the base 16 is disposed in a portion of the foundation 11 where the third frame 43 and the fourth frame 44 were disposed. The base 16 is disposed between the first frame 41 and the second frame 42 in the direction in which the beams 13 extend. The base 16 is fixed to the anchor bolts 12 to which the symmetrical frame was fixed. In this embodiment, the base 16 is fixed to the third to sixth anchor bolts 12c to 12f.

[0060] As shown in FIGS. 3 and 4 , the base 16 of this embodiment is made of channel steel. The base 16 has a first flange 61, a second flange 62, and a web 63. The first flange 61 is disposed along the upper surface of the foundation 11. The tips of the third to sixth anchor bolts 12c to 12f are inserted into bolt insertion holes formed in the first flange 61, thereby penetrating the first flange 61. Fixing nuts N are engaged with the tips of the third to sixth anchor bolts 12c to 12f, thereby fixing the base 16 to the third to sixth anchor bolts 12c to 12f. The second flange 62 is located above the first flange 61. As will be described in detail later, the fifth to seventh frame sets 45 to 47, which are new frame sets, are fixed to the second flange 62. The web 63 connects the first flange 61 and the second flange 62.

[0061] 3, the base 16 of this embodiment has a first end plate 64 and a second end plate 65. The first end plate 64 is located at a first end in the extension direction of the base 16. The second end plate 65 is located at a second end in the extension direction of the base 16.

[0062] The first end plate 64 is adjacent to the lower part of the first vertical frame portion 41c of the first frame 41. The first connection bolt B1 passes through the first end plate 64 and the lower part of the first vertical frame portion 41c. The first end plate 64 is fixed to the first vertical frame portion 41c by engaging a nut (not shown) with the first connection bolt B1. In other words, the first end plate 64 constitutes the first frame 41, which is an existing frame, and is fixed to the vertical frame portion adjacent to the first end plate 64.

[0063] The second end plate 65 is adjacent to the lower part of the second vertical frame portion 42c of the second frame 42. The second connection bolt B2 passes through the second end plate 65 and the lower part of the second vertical frame portion 42c. The second end plate 65 is fixed to the second vertical frame portion 42c by engaging a nut (not shown) with the second connection bolt B2. In other words, the second end plate 65 constitutes the second frame 42, which is an existing frame, and is fixed to the vertical frame portion adjacent to the second end plate 65. In this way, the base 16 is fixed not only to the anchor bolts 12 but also to the first frame 41 and the second frame 42, which are existing frame portions.

[0064] As shown in FIG. 2, the fifth to seventh frame sets 45 to 47 are arranged between the base 16 and the beams 13 in the vertical direction. The fifth to seventh frame sets 45 to 47 are arranged between the first frame set 41 and the second frame set 42 in the direction in which the beams 13 extend. The fifth frame set 45 is located between the first frame set 41 and the sixth frame set 46. The sixth frame set 46 is located between the fifth frame set 45 and the seventh frame set 47. The seventh frame set 47 is located between the sixth frame set 46 and the second frame set 42.

[0065] The fifth frame 45 includes a fifth lower horizontal frame portion 45a, a fifth upper horizontal frame portion 45b, a pair of fifth vertical frame portions 45c and 45d, and a fifth auxiliary frame portion 45e. The fifth lower horizontal frame portion 45a, the fifth upper horizontal frame portion 45b, and the fifth auxiliary frame portion 45e are each new horizontal frame portions extending in the direction in which the beams 13 extend. The pair of fifth vertical frame portions 45c and 45d are each new vertical frame portions extending in the up-down direction. The length of each of the fifth vertical frame portions 45c and 45d in the up-down direction is shorter than the length of each of the first vertical frame portion 41c and the second vertical frame portion 42c in the up-down direction by the dimension of the base 16 in the up-down direction.

[0066] The fifth lower horizontal frame portion 45a is disposed along the upper surface of the second flange 62 of the base 16. The fifth upper horizontal frame portion 45b is disposed along the lower surface of the beam 13. The fifth auxiliary frame portion 45e is located between the fifth lower horizontal frame portion 45a and the fifth upper horizontal frame portion 45b in the up-down direction. The pair of fifth vertical frame portions 45c, 45d are arranged side by side with a gap in between in the direction in which the beam 13 extends. One fifth vertical frame portion 45c is adjacent to the first vertical frame portion 41c of the first frame 41. The other fifth vertical frame portion 45d is adjacent to the sixth frame 46.

[0067] The lower ends of the pair of fifth vertical frame portions 45c, 45d are each fixed to the second flange 62 of the foundation 16 by bolts (not shown). Therefore, a new frame, the fifth frame 45, is fixed to the second flange 62 of the foundation 16. The upper ends of the pair of fifth vertical frame portions 45c, 45d are each fixed to the beam 13 by bolts (not shown). Therefore, the fifth frame 45 is fixed to the beam 13. One fifth vertical frame portion 45c is fixed to the first vertical frame portion 41c by bolts (not shown). Therefore, the fifth frame 45 is fixed to the first frame 41. The other fifth vertical frame portion 45d is fixed to the sixth frame 46 by bolts (not shown). Therefore, the fifth frame 45 is fixed to the sixth frame 46.

[0068] The sixth frame 46 includes a sixth lower horizontal frame portion 46a, a sixth upper horizontal frame portion 46b, and a pair of sixth vertical frame portions 46c, 46d. The sixth lower horizontal frame portion 46a and the sixth upper horizontal frame portion 46b are new horizontal frame portions that extend in the direction in which the beams 13 extend. The pair of sixth vertical frame portions 46c, 46d are new vertical frame portions that extend in the up-down direction. The length of each of the sixth vertical frame portions 46c, 46d in the up-down direction is shorter than the length of each of the first vertical frame portion 41c and the second vertical frame portion 42c in the up-down direction by the dimension of the base 16 in the up-down direction.

[0069] The sixth lower horizontal frame portion 46a is disposed along the upper surface of the second flange 62 of the base 16. The sixth upper horizontal frame portion 46b is disposed along the lower surface of the beam 13. The pair of sixth vertical frame portions 46c, 46d are arranged at an interval in the extension direction of the beam 13. One sixth vertical frame portion 46c is adjacent to the other fifth vertical frame portion 45d of the fifth frame 45. The other sixth vertical frame portion 46d is adjacent to the seventh frame 47.

[0070] The lower ends of the pair of sixth vertical frame portions 46c, 46d are each fixed to the second flange 62 of the foundation 16 by bolts (not shown). Therefore, the sixth frame 46, which is a new frame, is fixed to the second flange 62 of the foundation 16. The upper ends of the pair of sixth vertical frame portions 46c, 46d are each fixed to the beam 13 by bolts (not shown). Therefore, the sixth frame 46 is fixed to the beam 13. One sixth vertical frame portion 46c is fixed to the other fifth vertical frame portion 45d by bolts (not shown). Therefore, the sixth frame 46 is fixed to the fifth frame 45. The other sixth vertical frame portion 46d is fixed to the seventh frame 47 by bolts (not shown). Therefore, the sixth frame 46 is fixed to the seventh frame 47.

[0071] The sixth frame 46 has a sixth auxiliary lower horizontal frame portion 46e and a sixth auxiliary upper horizontal frame portion 46f. The sixth auxiliary lower horizontal frame portion 46e and the sixth auxiliary upper horizontal frame portion 46f are new horizontal frame portions that extend in the direction in which the beams 13 extend.

[0072] The sixth auxiliary lower horizontal frame portion 46e and the sixth auxiliary upper horizontal frame portion 46f are disposed between the sixth lower horizontal frame portion 46a and the sixth upper horizontal frame portion 46b in the up-down direction. The sixth auxiliary upper horizontal frame portion 46f is positioned closer to the sixth upper horizontal frame portion 46b than the sixth auxiliary lower horizontal frame portion 46e in the up-down direction. The sixth auxiliary lower horizontal frame portion 46e and the sixth auxiliary upper horizontal frame portion 46f are disposed between the pair of sixth vertical frame portions 46c, 46d in the extension direction of the beam 13. The sixth auxiliary lower horizontal frame portion 46e and the sixth auxiliary upper horizontal frame portion 46f each connect the pair of sixth vertical frame portions 46c, 46d.

[0073] The sixth frame 46 has two sixth auxiliary lower vertical frame portions 46g and two sixth auxiliary upper vertical frame portions 46h. The two sixth auxiliary lower vertical frame portions 46g and the two sixth auxiliary upper vertical frame portions 46h are new vertical frame portions extending in the vertical direction. The vertical length of each sixth auxiliary lower vertical frame portion 46g is shorter than the vertical length of each third auxiliary lower vertical frame portion 43g by the vertical dimension of the base 16.

[0074] The two sixth auxiliary lower vertical frame portions 46g are arranged between the sixth auxiliary lower horizontal frame portion 46e and the sixth lower horizontal frame portion 46a in the up-down direction. Each of the two sixth auxiliary lower vertical frame portions 46g connects the sixth auxiliary lower horizontal frame portion 46e and the sixth lower horizontal frame portion 46a. The two sixth auxiliary lower vertical frame portions 46g are arranged between the pair of sixth vertical frame portions 46c, 46d in the direction in which the beam 13 extends. The two sixth auxiliary lower vertical frame portions 46g are adjacent to each other in the direction in which the beam 13 extends.

[0075] The two sixth auxiliary upper vertical frame portions 46h are arranged between the sixth upper horizontal frame portion 46b and the sixth auxiliary upper horizontal frame portion 46f in the up-down direction. Each of the two sixth auxiliary upper vertical frame portions 46h connects the sixth upper horizontal frame portion 46b and the sixth auxiliary upper horizontal frame portion 46f. The two sixth auxiliary upper vertical frame portions 46h are arranged between the pair of sixth vertical frame portions 46c, 46d in the direction in which the beam 13 extends. The two sixth auxiliary upper vertical frame portions 46h are adjacent to each other in the direction in which the beam 13 extends.

[0076] In the sixth frame 46, an opening 460 is defined by a pair of sixth vertical frame portions 46c, 46d, a sixth auxiliary lower horizontal frame portion 46e, and a sixth auxiliary upper horizontal frame portion 46f. Therefore, the sixth frame 46 is an open frame having the opening 460. A window sash (not shown), for example, is fitted into the opening 460.

[0077] The seventh frame 47 includes a seventh lower horizontal frame portion 47a, a seventh upper horizontal frame portion 47b, a pair of seventh vertical frame portions 47c and 47d, and a seventh auxiliary frame portion 47e. The seventh lower horizontal frame portion 47a, the seventh upper horizontal frame portion 47b, and the seventh auxiliary frame portion 47e are each new horizontal frame portions extending in the direction in which the beams 13 extend. The pair of seventh vertical frame portions 47c and 47d are each new vertical frame portions extending in the up-down direction. The length of each of the seventh vertical frame portions 47c and 47d in the up-down direction is shorter than the length of each of the first vertical frame portion 41c and the second vertical frame portion 42c in the up-down direction by the dimension of the base 16 in the up-down direction.

[0078] The seventh lower horizontal frame portion 47a is disposed along the upper surface of the second flange 62 of the base 16. The seventh upper horizontal frame portion 47b is disposed along the lower surface of the beam 13. The seventh auxiliary frame portion 47e is located between the seventh lower horizontal frame portion 47a and the seventh upper horizontal frame portion 47b in the up-down direction. The pair of seventh vertical frame portions 47c, 47d are arranged with a gap in between in the direction in which the beam 13 extends. One seventh vertical frame portion 47c is adjacent to the other sixth vertical frame portion 46d of the sixth frame 46. The other seventh vertical frame portion 47d is adjacent to the second vertical frame portion 42c of the second frame 42.

[0079] The lower ends of the pair of seventh vertical frame portions 47c, 47d are each fixed to the second flange 62 of the foundation 16 by bolts (not shown). Therefore, the seventh frame 47, which is a new frame, is fixed to the second flange 62 of the foundation 16. Furthermore, the upper ends of the pair of seventh vertical frame portions 47c, 47d are each fixed to the beam 13 by bolts (not shown). Therefore, the seventh frame 47 is fixed to the beam 13. One seventh vertical frame portion 47c is fixed to the other sixth vertical frame portion 46d of the sixth frame 46 by bolts (not shown). Therefore, the seventh frame 47 is fixed to the sixth frame 46. The other seventh vertical frame portion 47d is fixed to the second vertical frame portion 42c of the second frame 42 by bolts (not shown). Therefore, the seventh frame 47 is fixed to the second frame 42.

[0080] Thus, in the building 10 before renovation, the third frame 43, which is an open frame, was located adjacent to the first frame 41, whereas in the building 10 after renovation, the sixth frame 46, which is an open frame, is located not adjacent to the first frame 41. In other words, the opening 460 in the building 10 after renovation is located closer to the second frame 42 in the direction in which the beams 13 extend than the opening 430 in the building 10 before renovation.

[0081] The fifth exterior wall material 55 is provided on the outdoor side of the fifth frame 45. The fifth exterior wall material 55 is supported by a support unit 17 (described later) provided on the foundation 16. The sixth exterior wall material 56 is provided on the outdoor side of the sixth frame 46. The sixth exterior wall material 56 is supported by a support unit 17 provided on the foundation 16. A through hole 56a is provided in the portion of the sixth exterior wall material 56 facing the opening 460. The seventh exterior wall material 57 is provided on the outdoor side of the seventh frame 47. The seventh exterior wall material 57 is supported by a support unit 17 provided on the foundation 16.

[0082] <Stiffener> 3, the base 16 of this embodiment has a plurality of stiffeners 66. Each stiffener 66 connects the first flange 61, the second flange 62, and the web 63.

[0083] The stiffeners 66 of this embodiment are provided at positions corresponding to the new vertical frame portions of the new framework in the extension direction of the base 16. Specifically, the stiffeners 66 are provided at positions corresponding to the pair of fifth vertical frame portions 45c, 45d, the pair of sixth vertical frame portions 46c, 46d, the pair of seventh vertical frame portions 47c, 47d, and the two sixth auxiliary lower vertical frame portions 46g in the extension direction of the base 16. Furthermore, the stiffeners 66 of this embodiment are provided at portions different from the portions fixed to the first to sixth anchor bolts 12a to 12f in the extension direction of the base 16.

[0084] As described above, in this embodiment, the two new vertical frame portions are adjacent to each other in the direction in which the base 16 extends. The base 16 has a first stiffener 66a as a stiffener 66 provided at a position corresponding to one of the two adjacent new vertical frame portions. The base 16 has a second stiffener 66b as a stiffener 66 provided at a position corresponding to the other of the two adjacent new vertical frame portions. The base 16 has a third stiffener 66c as a stiffener 66 provided between the first stiffener 66a and the second stiffener 66b.

[0085] Specifically, the first to third stiffeners 66a to 66c are provided at positions where the other fifth vertical frame portion 45d and one sixth vertical frame portion 46c are adjacent to each other. The first stiffener 66a is provided at a position corresponding to the other fifth vertical frame portion 45d. The second stiffener 66b is provided at a position corresponding to one sixth vertical frame portion 46c. The third stiffener 66c is provided at a position corresponding to the adjacent surface between the other fifth vertical frame portion 45d and one sixth vertical frame portion 46c.

[0086] The first to third stiffeners 66a to 66c are provided at positions where two sixth auxiliary lower vertical frame portions 46g are adjacent to each other. The first stiffener 66a is provided at a position corresponding to one sixth auxiliary lower vertical frame portion 46g. The second stiffener 66b is provided at a position corresponding to the other sixth auxiliary lower vertical frame portion 46g. The third stiffener 66c is provided at a position corresponding to the adjacent surfaces of the two sixth auxiliary lower vertical frame portions 46g.

[0087] Furthermore, the first to third stiffeners 66a to 66c are provided at positions where the other sixth vertical frame portion 46d and one seventh vertical frame portion 47c are adjacent to each other. The first stiffener 66a is provided at a position corresponding to the other sixth vertical frame portion 46d. The second stiffener 66b is provided at a position corresponding to one seventh vertical frame portion 47c. The third stiffener 66c is provided at a position corresponding to the adjacent surface between the other sixth vertical frame portion 46d and one seventh vertical frame portion 47c.

[0088] <Support unit> As shown in Figure 2, the base 16 is provided with a plurality of support units 17 for supporting the fifth to seventh exterior wall materials 55 to 57, which are new exterior wall materials, and for adjusting the vertical positions of the fifth to seventh exterior wall materials 55 to 57.

[0089] As shown in FIGS. 5 and 6, each support unit 17 has a support portion 71 that supports the new exterior building material, and an adjustment portion 72 that adjusts the position of the support portion 71 in the up-down direction. The adjustment part 72 has an adjustment bolt 73 and an adjustment nut 74. The adjustment bolt 73 has a shaft 73a and a head 73b provided at one end of the shaft 73a. The shaft 73a of the adjustment bolt 73 is inserted into an adjustment bolt insertion hole provided in a new horizontal frame part of the new frame assembly that is arranged along the base 16, and an adjustment bolt insertion hole provided in the second flange 62 of the base 16. As a result, the shaft 73a of the adjustment bolt 73 vertically penetrates the new horizontal frame part of the new frame assembly that is arranged along the base 16 and the second flange 62 of the base 16. The end of the shaft 73a opposite to the head 73b is positioned on the first flange 61. The adjustment nut 74 is engaged with the adjustment bolt 73. When the adjustment bolt 73 rotates, the position of the adjustment nut 74 relative to the adjustment bolt 73 changes in the axial direction of the shaft 73a.

[0090] The support portion 71 of this embodiment has an upper step portion 71a, a lower step portion 71b, and a step portion 71c connecting the upper step portion 71a and the lower step portion 71b. The support portion 71 has a stepped shape. An adjustment nut 74 passes through the upper step portion 71a. The adjustment nut 74 is fixed to the upper step portion 71a by being welded to the upper step portion 71a. Therefore, the support portion 71 is fixed to the adjustment nut 74. The lower step portion 71b is located closer to the exterior than the base 16 and lower than the upper step portion 71a in the vertical direction. A new exterior wall material is placed on the upper surface of the lower step portion 71b.

[0091] <How to renovate a building> A description will now be given of a method for renovating the building 10. The renovation of the building 10 is carried out by workers.

[0092] The method for renovating a building 10 includes a removal process for removing target exterior wall materials and target frame members from the building 10 before renovation. The target exterior wall materials in this embodiment are the third exterior wall material 53 and the fourth exterior wall material 54. Therefore, in the removal process of this embodiment, the third exterior wall material 53 and the fourth exterior wall material 54 are removed from the building 10. Furthermore, the target frame members in this embodiment are the third frame member 43 and the fourth frame member 44. Therefore, in the removal process of this embodiment, the third frame member 43 and the fourth frame member 44 are removed from the building 10.

[0093] More specifically, the fixing nuts N engaged with the third to sixth anchor bolts 12c to 12f are removed. The bolts for fixing the third frame 43 and the fourth frame 44 to the beam 13 are removed. The bolts for fixing the first frame 41 and the third frame 43, the bolts for fixing the second frame 42 and the fourth frame 44, and the bolts for fixing the third frame 43 and the fourth frame 44 are removed. This makes the third frame 43 and the fourth frame 44 ready to be removed from the building 10. Thereafter, the third frame 43 and the fourth frame 44 are removed from the building 10.

[0094] 7, when the removal step is completed, the tip portions of the anchor bolts 12 to which the target frame was fixed protrude from the upper surface of the foundation 11. In this embodiment, the tip portions of the third anchor bolt 12c to which the third frame 43 was fixed and the fourth anchor bolt 12d protrude from the upper surface of the foundation 11. In addition, the tip portions of the fifth anchor bolt 12e to which the fourth frame 44 was fixed and the sixth anchor bolt 12f protrude from the upper surface of the foundation 11.

[0095] The method for renovating a building 10 includes a base installation process in which a base 16 is placed in the part of the foundation 11 where the target frame was located, and then the base 16 is fixed to the anchor bolts 12 to which the target frame was fixed.

[0096] In this embodiment, in the base mounting step, the base 16 is placed in the portion of the foundation 11 where the third framework 43 and the fourth framework 44 were placed. At this time, the tips of the third to sixth anchor bolts 12c to 12f are inserted into the bolt insertion holes provided in the first flange 61. Thereafter, fixing nuts N are engaged with the third to sixth anchor bolts 12c to 12f. As a result, the base 16 is fixed to the third to sixth anchor bolts 12c to 12f.

[0097] Furthermore, in the foundation installation process, the foundation 16 is fixed not only to the anchor bolts 12 but also to the existing frame, which is the frame that was not removed in the removal process. As described above, the foundation 16 has a first end plate 64 located at a first end in the direction in which the foundation 16 extends, and a second end plate 65 located at a second end in the direction in which the foundation 16 extends. The first end plate 64 constitutes the existing frame and is fixed to a vertical frame portion adjacent to the first end plate 64. The second end plate 65 constitutes the existing frame and is fixed to a vertical frame portion adjacent to the second end plate 65.

[0098] The existing frameworks in this embodiment are a first framework 41 and a second framework 42. The first vertical frame portion 41c of the first framework 41 is adjacent to the first end plate 64. The second vertical frame portion 42c of the second framework 42 is adjacent to the second end plate 65. The first end plate 64 is fixed to the first vertical frame portion 41c by a first connection bolt B1. This fixes the base 16 to the first framework 41. The second end plate 65 is fixed to the second vertical frame portion 42c by a second connection bolt B2. This fixes the base 16 to the second framework 42.

[0099] The method for renovating the building 10 includes a frame installation process in which a new frame having new vertical frame portions and new horizontal frame portions is placed between the foundation 16 and the beams 13, and then the new frame is fixed to the foundation 16. In the frame installation process, the new frame is also fixed to the beams 13. In addition, in the frame installation process, the new frame is also fixed to the frame 14 adjacent in the direction in which the beams 13 extend. The new frame members in this embodiment are the fifth to seventh frame members 45 to 47. Therefore, in the frame installation process of this embodiment, the fifth to seventh frame members 45 to 47 are placed between the foundation 16 and the beams 13, and then fixed to the foundation 16.

[0100] Specifically, in the frame installation process, the fifth frame 45 is positioned between the base 16 and the beam 13. The fifth lower horizontal frame portion 45a is positioned along the base 16. The fifth upper horizontal frame portion 45b is positioned along the beam 13. One fifth vertical frame portion 45c is positioned adjacent to the first vertical frame portion 41c of the first frame 41. The other fifth vertical frame portion 45d is positioned adjacent to one sixth vertical frame portion 46c of the sixth frame 46.

[0101] As shown in FIG. 8 , when the fifth vertical frame portion 45c is to be disposed between the base 16 and the beam 13, the fifth vertical frame portion 45c is tilted so that the upper end of the fifth vertical frame portion 45c is disposed between the base 16 and the beam 13. Then, while the upper end of the fifth vertical frame portion 45c is positioned below the beam 13, the posture of the fifth vertical frame portion 45c is changed so that the fifth vertical frame portion 45c extends in the vertical direction, thereby disposing the lower end of the fifth vertical frame portion 45c between the base 16 and the beam 13. The same applies to the case where a new vertical frame portion other than the fifth vertical frame portion 45c is disposed between the base 16 and the beam 13. In the above description, the upper end of the fifth vertical frame portion 45c is disposed between the base 16 and the beam 13 before the lower end. However, the lower end of the fifth vertical frame portion 45c may be disposed between the base 16 and the beam 13 before the upper end.

[0102] The lower ends of the pair of fifth vertical frame portions 45c, 45d are each fixed to the second flange 62 of the foundation 16 by bolts (not shown). This fixes the fifth frame 45 to the foundation 16. The upper ends of the pair of fifth vertical frame portions 45c, 45d are each fixed to the beam 13 by bolts (not shown). This fixes the fifth frame 45 to the beam 13. One fifth vertical frame portion 45c is fixed to the first vertical frame portion 41c by bolts (not shown). This fixes the fifth frame 45 to the first frame 41. The other fifth vertical frame portion 45d is fixed to one sixth vertical frame portion 46c by bolts (not shown). This fixes the fifth frame 45 to the sixth frame 46.

[0103] In the frame installation process, the sixth frame 46 is positioned between the base 16 and the beam 13. The sixth lower horizontal frame portion 46a is positioned so as to extend along the base 16. The sixth upper horizontal frame portion 46b is positioned so as to extend along the beam 13. One sixth vertical frame portion 46c is positioned so as to be adjacent to the other fifth vertical frame portion 45d of the fifth frame 45. The other sixth vertical frame portion 46d is positioned so as to be adjacent to one seventh vertical frame portion 47c of the seventh frame 47.

[0104] The lower ends of the pair of sixth vertical frame portions 46c, 46d are each fixed to the second flange 62 of the foundation 16 by bolts (not shown). This fixes the sixth frame 46 to the foundation 16. The upper ends of the pair of sixth vertical frame portions 46c, 46d are each fixed to the beam 13 by bolts (not shown). This fixes the sixth frame 46 to the beam 13. One sixth vertical frame portion 46c is fixed to the other fifth vertical frame portion 45d by bolts (not shown). This fixes the sixth frame 46 to the fifth frame 45. The other sixth vertical frame portion 46d is fixed to one seventh vertical frame portion 47c by bolts (not shown). This fixes the sixth frame 46 to the seventh frame 47.

[0105] In the frame installation process, the seventh frame 47 is positioned between the base 16 and the beam 13. The seventh lower horizontal frame portion 47a is positioned along the base 16. The seventh upper horizontal frame portion 47b is positioned along the beam 13. One seventh vertical frame portion 47c is positioned adjacent to the other sixth vertical frame portion 46d of the sixth frame 46. The other seventh vertical frame portion 47d is positioned adjacent to the second vertical frame portion 42c of the second frame 42.

[0106] The lower ends of the pair of seventh vertical frame portions 47c, 47d are each fixed to the second flange 62 of the foundation 16 by bolts (not shown). This fixes the seventh frame set 47 to the foundation 16. The upper ends of the pair of seventh vertical frame portions 47c, 47d are each fixed to the beam 13 by bolts (not shown). This fixes the seventh frame set 47 to the beam 13. One seventh vertical frame portion 47c is fixed to the other sixth vertical frame portion 46d by bolts (not shown). This fixes the seventh frame set 47 to the sixth frame set 46. The other seventh vertical frame portion 47d is fixed to the second vertical frame portion 42c by bolts (not shown). This fixes the seventh frame set 47 to the second frame set 42.

[0107] As described above, the sixth frame 46 is an open frame having an opening 460. Therefore, in the frame installation process of this embodiment, a new frame that is an open frame is installed. In addition, one fifth vertical frame portion 45c of the fifth frame 45 and the other seventh vertical frame portion 47d of the seventh frame 47 are fixed to both ends in the direction in which the base 16 extends. The pair of sixth vertical frame portions 46c, 46d of the sixth frame 46 are fixed to portions other than both ends in the direction in which the base 16 extends.

[0108] The method for renovating the building 10 of this embodiment includes a support unit mounting step of mounting the support units 17 on the base 16. In the support unit mounting step of this embodiment, the support units 17 are mounted on the base 16 at positions corresponding to both ends of the fifth to seventh frameworks 45 to 47 in the direction in which the base 16 extends. The support units 17 include a support portion 71 and an adjustment portion 72 for adjusting the vertical position of the support portion 71. The support portion 71 is mounted on the base 16 so as to be located outdoors relative to the base 16.

[0109] More specifically, the shaft 73a of the adjustment bolt 73 of the support unit 17 is inserted into an adjustment bolt insertion hole provided in a new horizontal frame portion of the new framework that is arranged along the base 16, and an adjustment bolt insertion hole provided in the second flange 62 of the base 16. At this time, the adjustment nut 74 to which the support portion 71 is fixed engages with the shaft 73a of the adjustment bolt 73. The shaft 73a of the adjustment bolt 73 is inserted until the end opposite to the head 73b comes into contact with the first flange 61 of the base 16. The lower portion 71b of the support portion 71 is located outdoors of the base 16 and below the upper portion 71a.

[0110] The method for renovating the building 10 includes an exterior wall material installation step for installing new exterior wall materials. In the exterior wall material installation step, the new exterior wall material is placed on the support portion 71 of the support unit 17. In this embodiment, the new exterior wall material is placed on the lower portion 71b of the support portion 71. By placing the new exterior wall material on the support portion 71, the new exterior wall material is supported by the support portion 71. The new exterior wall materials in this embodiment are the fifth to seventh exterior wall materials 55 to 57. Therefore, in the exterior wall material installation step of this embodiment, the fifth to seventh exterior wall materials 55 to 57 are placed on the support portion 71. The fifth exterior wall material 55 is provided on the outdoor side of the fifth frame 45. The sixth exterior wall material 56 is provided on the outdoor side of the sixth frame 46. The seventh exterior wall material 57 is provided on the outdoor side of the seventh frame 47.

[0111] In the exterior wall material installation process, if the vertical position of the new exterior wall material differs from the vertical position of the adjacent exterior wall material 15, the vertical position of the new exterior wall material is adjusted by the adjustment unit 72. In this embodiment, the worker adjusts the vertical position of the new exterior wall material by rotating the head 73b of the adjustment bolt 73. Note that if the vertical position of the new exterior wall material is the same as the vertical position of the adjacent exterior wall material 15, this adjustment process is omitted.

[0112] In this embodiment, when the vertical position of the fifth exterior wall material 55 differs from the vertical position of the first exterior wall material 51, the adjustment unit 72 adjusts the vertical position of the fifth exterior wall material 55. When the vertical position of the seventh exterior wall material 57 differs from the vertical position of the second exterior wall material 52, the adjustment unit 72 adjusts the vertical position of the seventh exterior wall material 57. When the vertical position of the sixth exterior wall material 56 differs from the vertical positions of the fifth exterior wall material 55 and the seventh exterior wall material 57, the adjustment unit 72 adjusts the vertical position of the sixth exterior wall material 56.

[0113] [Operation of this embodiment] The operation of this embodiment will be described. The base 16 is provided with a support unit 17 having a support portion 71 that is located outdoors relative to the base 16 and supports the new exterior wall material, and an adjustment portion 72 for adjusting the vertical position of the support portion 71. In this embodiment, the adjustment portion 72 has an adjustment bolt 73 that has a shaft portion 73a and a head portion 73b, and an adjustment nut 74 that engages with the adjustment bolt 73. The shaft portion 73a passes through the second flange 62 of the base 16 in the vertical direction. The end of the shaft portion 73a opposite the head portion 73b is positioned on the first flange 61. The support portion 71 is fixed to the adjustment nut 74.

[0114] When the adjustment bolt 73 rotates, the position of the adjustment nut 74 relative to the adjustment bolt 73 changes in the axial direction of the shaft portion 73a. As a result, the vertical position of the support portion 71 fixed to the adjustment nut 74 also changes. Therefore, by rotating the adjustment bolt 73, the worker can adjust the vertical position of the new exterior wall material.

[0115] Furthermore, according to the method for renovating the building 10 of this embodiment, the position of an opening in the building 10 can be freely changed. This point will be explained below. When moving an opening frame during renovation of a building 10 in which the frame 14 and the anchor bolts 12 of the foundation 11 are directly fixed, if the base 16 is not used as in this embodiment, it is necessary to position a new vertical frame portion for fixing the new opening frame on the anchor bolts 12. This limits the position of the opening frame. In this regard, according to the method for renovating the building 10 of this embodiment, the base 16 is placed in the part of the foundation 11 where the target frame was located. Then, the new opening frame is fixed to the base 16. This allows the new vertical frame portion to be positioned on the base 16 regardless of the position of the anchor bolts 12, easing the restrictions on the position of the opening frame.

[0116] Furthermore, when the foundation 16 having the stiffeners 66 is used in the method of renovating the building 10, the following effect is achieved. The new vertical frame portion of the new frame is fixed to the portion of the foundation 16 where the stiffeners 66 are provided. As a result, the load of the new vertical frame portion of the new frame is transmitted to the foundation 11 via the stiffeners 66 and the first flanges 61. When the building 10 is renovated, the frame 14 is changed to a structure that is not fixed to the anchor bolts 12, but the above-mentioned arrangement of the stiffeners 66 of the foundation 16 and the new vertical frame portion of the new frame can maintain the strength of the building 10 before and after the renovation, or can prevent a decrease in the strength of the building 10.

[0117] [Effects of this embodiment] The effects of this embodiment will be described. (1) A building 10 before renovation has a foundation 11, beams 13, a frame 14 having vertical and horizontal frame portions arranged between the foundation 11 and the beams 13, and exterior wall materials 15 provided on the outdoor side of the frame 14. The frame 14 is fixed to anchor bolts 12 protruding from the foundation 11. A method for renovating such a building 10 includes a removal process, a base installation process, a frame installation process, and an exterior wall material installation process.

[0118] The removal process is a process of removing the target exterior wall material, which is the exterior wall material 15 to be replaced, and the target frame, which is the frame 14 to be replaced. The base installation process is a process of placing a base 16 in the part of the foundation 11 where the target frame was located, and then fixing the base 16 to the anchor bolts 12 to which the target frame was fixed. The frame installation process is a process of placing a new frame having new vertical frame portions and new horizontal frame portions between the base 16 and the beams 13, and then fixing the new frame to the base 16. The exterior wall material installation process is a process of installing new exterior wall materials.

[0119] The base 16 is provided with a support unit 17 having a support part 71 and an adjustment part 72 for adjusting the vertical position of the support part 71. The support part 71 is attached to the base 16 so as to be positioned closer to the exterior than the base 16. In the exterior wall material installation process, a new exterior wall material is placed on the support part 71.

[0120] According to this method, by adjusting the vertical position of the support part 71 using the adjustment part 72, the vertical position of the new exterior building material supported by the support part 71 can be adjusted. (2) The base 16 has a first flange 61 fixed to the anchor bolt 12, a second flange 62 located above the first flange 61 and to which a new framework is fixed, and a web 63 connecting the first flange 61 and the second flange 62. The adjustment portion 72 has an adjustment bolt 73 having a shaft portion 73a and a head portion 73b, and an adjustment nut 74 engaged with the adjustment bolt 73. The shaft portion 73a passes through the second flange 62 of the base 16 in the vertical direction. The end of the shaft portion 73a opposite to the head portion 73b is positioned on the first flange 61. A support portion 71 is fixed to the adjustment nut 74.

[0121] When the adjustment bolt 73 rotates, the position of the adjustment nut 74 relative to the adjustment bolt 73 changes in the axial direction of the shaft portion 73a. As a result, the vertical position of the support portion 71 fixed to the adjustment nut 74 also changes. Therefore, by rotating the adjustment bolt 73, the worker can adjust the vertical position of the new exterior wall material.

[0122] Furthermore, the head 73b of the adjustment bolt 73 is located above the second flange 62. For this reason, even when the new siding material is supported by the support portion 71, that is, when the space surrounded by the first flange 61, the second flange 62, and the web 63 is covered by the new siding material, the worker can easily rotate the adjustment bolt 73.

[0123] (3) For example, if the support portion 71 is flat, even if the support portion 71 is lowered to a position where the lower surface of the support portion 71 contacts the first flange 61, the upper surface of the support portion 71 will be located above the first flange 61. Therefore, the new exterior wall material supported by the support portion 71 will also be located above the first flange 61. Therefore, the new exterior wall material cannot cover the entire base 16.

[0124] In contrast, in this embodiment, the support part 71 has an upper step part 71a to which the adjustment nut 74 is fixed, a lower step part 71b that is located outdoors from the base 16 and below the upper step part 71a and on which a new exterior wall material is placed, and a step part 71c that connects the upper step part 71a and the lower step part 71b. This allows the lower step part 71b to be located below the first flange 61, and therefore the new exterior wall material supported by the support part 71 can also be located below the first flange 61. Therefore, the entire base 16 can be covered with the new exterior wall material, improving the appearance of the building 10 after renovation.

[0125] (4) The foundation 16 has a first end plate 64 located at a first end in the direction in which the foundation 16 extends, and a second end plate 65 located at a second end in the direction in which the foundation 16 extends. In the foundation installation process, the first end plate 64 forms part of the existing frame and is fixed to a vertical frame portion adjacent to the first end plate 64. In addition, the second end plate 65 forms part of the existing frame and is fixed to a vertical frame portion adjacent to the second end plate 65. As a result, the foundation 16 is fixed not only to the anchor bolts 12 but also to the existing frame, making it possible to more firmly fix the foundation 16.

[0126] (5) The base 16 has a stiffener 66 that connects the first flange 61, the second flange 62, and the web 63. The stiffener 66 is provided in a position corresponding to the new vertical frame portion of the new framework in the extension direction of the base 16. As a result, the portion of the base 16 where the new vertical frame portion is attached, which is a portion that is likely to be subjected to load, is reinforced by the stiffener 66. Therefore, deformation of the base 16 can be suppressed.

[0127] Furthermore, by providing a new vertical frame in the portion of the base 16 reinforced with the stiffener 66, the load applied to the new vertical frame is transmitted to the foundation 11 via the stiffener 66 and the first flange 61. Therefore, compared to when the stiffener 66 is not provided near the new vertical frame in the base 16, the load applied from the framework 14 to other members can be reduced, making the building 10 more stable.

[0128] (6) The stiffener 66 is provided in a portion of the base 16 in the extension direction that is different from the portion that is fixed to the anchor bolt 12. This prevents the stiffener 66 from interfering with the anchor bolt 12, improving workability when fixing the base 16 to the anchor bolt 12 in the base installation process.

[0129] (7) In the frame installation process, the two new vertical frame portions are attached so as to be adjacent to each other in the extension direction of the base 16. The base 16 has stiffeners 66, which include a first stiffener 66a, a second stiffener 66b, and a third stiffener 66c. The first stiffener 66a is provided at a position corresponding to one of the two adjacent new vertical frame portions. The second stiffener 66b is provided at a position corresponding to the other of the two adjacent new vertical frame portions. The third stiffener 66c is provided between the first stiffener 66a and the second stiffener 66b. As a result, the portions of the base 16 where the two new vertical frame portions are attached, which are particularly susceptible to load, are reinforced by the first to third stiffeners 66a to 66c. This further suppresses deformation of the base 16.

[0130] (8) In the frame installation step, the sixth frame 46, which is an open frame having an opening 460, is installed. For example, when fixing an open frame to the anchor bolts 12 to which the target frame was fixed, it is necessary to position a new vertical frame portion on the anchor bolts 12, which limits the position of the open frame in the extension direction of the beam 13. In other words, it is not possible to create an opening at any position in the extension direction of the beam 13. In order to create an opening at any position in the extension direction of the beam 13, it is necessary to install new anchor bolts 12 to fix the open frame.

[0131] In contrast, when the base 16 is fixed to the anchor bolts 12 to which the target frame was fixed and an opening frame is fixed to the base 16, the new vertical frame portion can be fixed to the base 16 even if the new vertical frame portion is not positioned on the anchor bolts 12. Therefore, the opening frame can be placed at any position in the extension direction of the base 16 without providing new anchor bolts 12 to fix the new frame. In the frame installation process of this embodiment, the pair of sixth vertical frame portions 46c, 46d of the sixth frame 46 are fixed to a portion other than both end portions of the base 16. Therefore, an opening 460 can be provided in the center of the base 16 in the extension direction.

[0132] (9) For example, when a new frame is fixed to the anchor bolts 12 to which the target frame was fixed, when a new vertical frame part is placed between the foundation 11 and the beam 13, it is necessary to lift the new frame upward so that the lower end of the new vertical frame part does not interfere with the tip of the anchor bolt 12. For this reason, as shown by the two-dot chain line in Figure 8, for example, if the arm 18b supporting the eaves 18a is placed adjacent to the beam 13, the upper end of the vertical frame part will interfere with the arm 18b, and the new frame cannot be lifted upward.

[0133] In contrast, in this embodiment, the base 16 is fixed to the anchor bolts 12 to which the target frame was fixed, and the new frame is fixed to the base 16. In this case, when placing the base 16 between the footing 11 and the beam 13, it is necessary to lift the base 16 upward so that the lower end of the base 16 does not interfere with the tip of the anchor bolt 12. However, because there is sufficient space between the base 16 and the beam 13, the upper end of the base 16 does not interfere with the arm 18b even if the arm 18b is adjacent to the beam 13. Therefore, the base 16 can be placed between the footing 11 and the beam 13. Furthermore, because no bolts protrude from the upper surface of the second flange 62 of the base 16, it is not necessary to lift the new vertical frame when placing the new vertical frame between the base 16 and the beam 13. Therefore, even if the arm 18b is adjacent to the beam 13, the new vertical frame can be placed between the base 16 and the beam 13.

[0134] (10) The adjustment unit 72 has an adjustment bolt 73 and an adjustment nut 74. Therefore, for example, compared to when the adjustment unit 72 is configured so that the vertical position of the new exterior building material can be adjusted in stages, it is easier to fine-tune the vertical position of the new exterior building material.

[0135] <Example of change> The above-described embodiments are examples of the methods for renovating the building 10 and the forms that the building 10 can take, and are not intended to limit the forms. The methods for renovating the building 10 and the building 10 can take forms different from those exemplified in the above-described embodiments. Examples of such forms include forms in which part of the configuration of the embodiments is replaced, modified, or omitted, or forms in which new configurations are added to the embodiments. Modified examples of the embodiments are shown below.

[0136] As long as the frame 14 has horizontal and vertical frame portions, the configuration of the frame 14 may be changed as appropriate. In the above embodiment, the number of target frame units is two, the third frame unit 43 and the fourth frame unit 44, but it may be one, or three or more.

[0137] In the above embodiment, the number of new frames is three, namely, the fifth to seventh frames 45 to 47, but it may be two or less, or four or more. In the above embodiment, the base 16 is made of a channel steel, but this is not limiting. The base 16 may be made of, for example, an H-shaped steel. In this case, the base 16 also has a first flange 61, a second flange 62, and a web 63.

[0138] The base 16 does not have to have the stiffener 66. Even in this case, at least the effect (1) above can be achieved. The stiffener 66 may be provided at a position other than the position corresponding to the new vertical frame portion in the extension direction of the base 16.

[0139] The stiffeners 66 may be provided to the foundation 16 at the construction site of the building 10, or may be provided in advance to the foundation 16 at a factory where the foundation 16 is manufactured. When the stiffeners 66 are provided in advance to the foundation 16 at a factory, a plurality of stiffeners 66 may be provided in the foundation 16, and some of the plurality of stiffeners 66 may be provided at positions corresponding to the new vertical frame portions.

[0140] The support unit installation process may be carried out at the construction site of the building 10 or at the factory where the foundation 16 is manufactured. In the above embodiment, the method for renovating the building 10 and the building 10 are applied to renovations for changing the position of an opening, but the present invention is not limited to this.

[0141] The method for renovating the building 10 and the building 10 may be applied to renovations for creating a new opening, for example. In this case, the new framework includes an opening framework. The method for renovating the building 10 and the building 10 may be applied to a renovation to remove an existing opening, for example. In this case, the new framework does not include an opening framework.

[0142] The method for renovating the building 10 and the building 10 may be applied to renovations to replace, for example, the frame 14 that has deteriorated over time. The configuration of the adjustment unit 72 may be changed as needed. For example, the adjustment unit 72 may be configured to adjust the vertical position of the support unit 71 in stages.

[0143] In the above embodiment, the adjustment of the vertical position of the support portion 71 was performed after the new exterior wall material was supported by the support portion 71, but it may also be performed before the new exterior wall material is supported by the support portion 71.

[0144] This specification discloses the following techniques: [Appendix 1] A method for renovating a building having a foundation, beams, a frame having vertical frame portions and horizontal frame portions arranged between the foundation and the beams, and exterior wall materials provided outdoors of the frame and frame, the frame being fixed to anchor bolts protruding from the foundation, the method comprising the steps of: removing the target exterior wall material that is the exterior wall material to be replaced and the target frame and frame that is the frame to be replaced; and placing a base in the part of the foundation where the target frame and frame were located, and fixing the base to the anchor bolts where the target frame and frame were fixed. A method for renovating a building, comprising: an installation step; a frame installation step of placing a new frame having new vertical frame sections and new horizontal frame sections between the foundation and the beams and fixing the new frame to the foundation; and an exterior wall material installation step of installing new exterior wall materials, wherein the foundation is provided with a support unit having a support section and an adjustment section for adjusting the vertical position of the support section, the support section being attached to the foundation so as to be positioned outside of the foundation, and the exterior wall material installation step involves placing the new exterior wall material on the support section.

[0145] [Appendix 2] In the building renovation method described in Appendix 1, the foundation has a first flange fixed to the anchor bolt, a second flange located above the first flange and to which the new frame is fixed, and a web connecting the first flange and the second flange, the adjustment part has an adjustment bolt having a shaft and a head, and an adjustment nut that engages with the adjustment bolt, the shaft part passes through the second flange in the vertical direction, the end of the shaft part opposite the head is positioned on the first flange, and the support part is fixed to the adjustment nut.

[0146] [Appendix 3] In the building renovation method described in Appendix 2, the support portion has an upper portion to which the adjustment nut is fixed, a lower portion located outdoors from the base and lower than the upper portion in the vertical direction and on which the new exterior wall material is placed, and a step portion connecting the upper portion and the lower portion.

[0147] [Appendix 4] In the building renovation method described in Appendix 1, the foundation has a first end plate located at a first end in the direction in which the foundation extends and a second end plate located at a second end in the direction in which the foundation extends, and in the foundation installation process, the first end plate constitutes the existing frame, which is the frame that was not removed in the removal process, and is fixed to the vertical frame portion adjacent to the first end plate, and the second end plate constitutes the existing frame and is fixed to the vertical frame portion adjacent to the second end plate.

[0148] [Appendix 5] In the building renovation method described in Appendix 1, the foundation has a first flange fixed to the anchor bolt, a second flange located above the first flange and to which the new frame is fixed, a web connecting the first flange and the second flange, and a stiffener connecting the first flange, the second flange, and the web, and the stiffener is provided at a position corresponding to the new vertical frame portion of the new frame in the direction in which the foundation extends.

[0149] [Appendix 6] In the building renovation method described in Appendix 5, the stiffener is provided in a part different from the part fixed to the anchor bolt in the extension direction of the base.

[0150] [Appendix 7] In the building renovation method described in Appendix 5, in the frame installation process, the two new vertical frame sections are installed so that they are adjacent to each other in the direction in which the base extends, and the base has a first stiffener as the stiffener provided at a position corresponding to one of the two adjacent new vertical frame sections, a second stiffener as the stiffener provided at a position corresponding to the other of the two adjacent new vertical frame sections, and a third stiffener as the stiffener provided between the first stiffener and the second stiffener.

[0151] [Appendix 8] In the building renovation method described in Appendix 1, in the frame installation process, the new frame, which is an open frame with an opening, is installed, and the new vertical frame portion of the open frame is fixed to a part of the base other than both ends.

[0152] [Appendix 9] A building comprising a foundation, beams, a frame having vertical and horizontal frame sections arranged between the foundation and the beams, and exterior wall materials arranged outdoors relative to the frame, wherein the building also comprises a base arranged between the foundation and the beams and fixed to anchor bolts protruding from the foundation, the frame being arranged between the base and the beams and fixed to the base, and the base being provided with a support unit having a support section that supports the exterior wall material and an adjustment section for adjusting the vertical position of the support section. [Explanation of symbols]

[0153] 10...Building, 11...Foundation, 12...Anchor bolt, 13...Beam, 14...Frame, 15...Exterior wall material, 16...Base, 17...Support unit, 43...Third frame as target frame, 44...Fourth frame as target frame, 45...Fifth frame as new frame, 46...Sixth frame as new frame, 47...Seventh frame as new frame, 53...Third exterior wall material as target exterior wall material, 54...Fourth exterior wall material as target exterior wall material, 55...Fifth exterior wall material as new exterior wall material, 56 ...6th exterior wall material as a new exterior wall material, 57...7th exterior wall material as a new exterior wall material, 61...first flange, 62...second flange, 63...web, 64...first end plate, 65...second end plate, 66...stiffener, 66a...first stiffener, 66b...second stiffener, 66c...third stiffener, 71...support portion, 71a...upper portion, 71b...lower portion, 71c...step portion, 72...adjustment portion, 73...adjustment bolt, 73a...shaft portion, 73b...head portion, 74...adjustment nut, 460...opening.

Claims

1. A method for renovating a building having a foundation, a beam, a frame having vertical frame portions and horizontal frame portions arranged between the foundation and the beam, and an exterior wall material provided outside the frame, the frame being fixed to anchor bolts protruding from the foundation, a removal process of removing a target exterior wall material that is the exterior wall material to be replaced and a target frame that is the frame to be replaced; a base installation process of placing a base on the portion of the foundation where the target frame was placed and fixing the base to the anchor bolts where the target frame was fixed; a frame installation process of placing a new frame having a new vertical frame portion and a new horizontal frame portion between the foundation and the beam and fixing the new frame to the foundation; An exterior wall material installation process for installing new exterior wall materials; and a support unit having a support portion and an adjustment portion for adjusting a vertical position of the support portion is provided on the base, and the support portion is attached to the base so as to be located outdoors relative to the base; In the exterior wall material mounting step, the new exterior wall material is placed on the support portion.

2. The base has a first flange fixed to the anchor bolt, a second flange located above the first flange and to which the new framework is fixed, and a web connecting the first flange and the second flange, the adjustment portion includes an adjustment bolt having a shaft portion and a head portion, and an adjustment nut that engages with the adjustment bolt, The shaft portion passes through the second flange in the up-down direction, an end of the shaft portion opposite the head portion is disposed on the first flange; The method for renovating a building according to claim 1, wherein the support portion is fixed to the adjustment nut.

3. The method for renovating a building as described in claim 2, wherein the support portion has an upper portion to which the adjustment nut is fixed, a lower portion located outdoors from the base and lower than the upper portion in the vertical direction and on which the new exterior wall material is placed, and a step portion connecting the upper portion and the lower portion.

4. The base has a first end plate located at a first end in the extension direction of the base and a second end plate located at a second end in the extension direction of the base, In the base mounting step, The first end plate constitutes an existing frame that is the frame that was not removed in the removal step, and is fixed to the vertical frame portion adjacent to the first end plate, The method for renovating a building according to claim 1, wherein the second end plate is fixed to the vertical frame portion that constitutes the existing framework and is adjacent to the second end plate.

5. The base has a first flange fixed to the anchor bolt, a second flange located above the first flange and to which the new framework is fixed, a web connecting the first flange and the second flange, and a stiffener connecting the first flange, the second flange, and the web, The method for renovating a building according to claim 1, wherein the stiffener is provided at a position corresponding to the new vertical frame portion of the new framework in the direction in which the foundation extends.

6. The method for renovating a building according to claim 5, wherein the stiffener is provided at a portion different from the portion fixed to the anchor bolt in the direction in which the base extends.

7. In the frame installation step, the two new vertical frame portions are installed adjacent to each other in the extension direction of the base, The base is A first stiffener as the stiffener provided at a position corresponding to one of the two adjacent new vertical frame portions; A second stiffener as the stiffener provided at a position corresponding to the other of the two adjacent new vertical frame portions; a third stiffener as the stiffener provided between the first stiffener and the second stiffener; The method for renovating a building according to claim 5, comprising:

8. The method for renovating a building as described in claim 1, wherein in the frame installation process, the new frame is an open frame having an opening, and the new vertical frame portion of the open frame is fixed to a part other than both ends of the foundation.

9. The basics and Beams and a framework having vertical frame portions and horizontal frame portions arranged between the foundation and the beam; An exterior wall material provided outside the framework; A building comprising: a base disposed between the foundation and the beam and fixed to anchor bolts protruding from the foundation; the frame is disposed between the foundation and the beam and fixed to the foundation; A building in which the foundation is provided with a support unit having a support portion that supports the exterior wall material and an adjustment portion that adjusts the vertical position of the support portion.

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